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EP2008159B1 - Timepiece comprising a dual time zone mechanism - Google Patents

Timepiece comprising a dual time zone mechanism Download PDF

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Publication number
EP2008159B1
EP2008159B1 EP07727745A EP07727745A EP2008159B1 EP 2008159 B1 EP2008159 B1 EP 2008159B1 EP 07727745 A EP07727745 A EP 07727745A EP 07727745 A EP07727745 A EP 07727745A EP 2008159 B1 EP2008159 B1 EP 2008159B1
Authority
EP
European Patent Office
Prior art keywords
time
heart
wheel
piece
display means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP07727745A
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German (de)
French (fr)
Other versions
EP2008159A2 (en
Inventor
Marco Rochat
Simon Guenin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Frederic Piguet SA
Original Assignee
Frederic Piguet SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Frederic Piguet SA filed Critical Frederic Piguet SA
Priority to EP07727745A priority Critical patent/EP2008159B1/en
Publication of EP2008159A2 publication Critical patent/EP2008159A2/en
Application granted granted Critical
Publication of EP2008159B1 publication Critical patent/EP2008159B1/en
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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/007—Gearwork with differential work
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/001—Clutch mechanism between two rotating members with transfer of movement in both directions, possibly with limitation on the transfer of power
    • G04B11/003—Clutch mechanism between two rotating members with transfer of movement in both directions, possibly with limitation on the transfer of power with friction member, e.g. with spring action
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/221—Arrangements for indicating different local apparent times; Universal time pieces mechanisms for correcting the hours hand only, i.e. independently for minutes and seconds hands

Definitions

  • the present invention relates to a timepiece comprising a mechanism with two time zones.
  • the time of one of the timezones is provided by means of a smaller size device which is difficult to read.
  • a first object of the present invention is to overcome this disadvantage as well as others by proposing to simplify the display in a timepiece dual time zone and selectively indicate the time of one either of the two time zones by the same display.
  • Timepieces have already been proposed in which the same display could selectively indicate two different pieces of information.
  • the patent document CH 693'155 discloses a display mechanism for a watch arranged to be switched so as to display with the same needle at least a first and a second information different from the first. From the brief indications given by this document, it is understood that a core integral with the planet wheel of a planet gear is provided for analogically storing the difference between the value of the first and the value of the second piece of information, while the first information (eg time) is displayed.
  • a first input of the planetary gear is kinematically connected to the needle, while the second input is driven to represent the value of the second information.
  • the angular position of the planet wheel, or differential output wheel in principle reflects the difference between the value taken by the second information and that indicated by the needle.
  • the display mechanism is switched to the second information, the kinematic link between the first information and the needle is disengaged.
  • a hammer is lowered against the heart, to rotate the heart and bring him and the planet wheel, in angular position "zero".
  • the needle is kinematically connected to the planet gear, it is driven by it and moves to indicate the value taken by the second piece of information. Then, as long as the display mechanism indicates the second piece of information, the planet wheel is immobilized by the hammer.
  • the movements of the second differential input wheel are therefore transmitted to the needle whose position evolves according to the value taken by the second piece of information.
  • the kinematic link disengageable between the first information and the needle is constituted by a second core cooperating with a second hammer.
  • the present invention therefore also aims to provide a timepiece including a mechanism capable of selectively indicating the time of one or the other of the two time zones by the same display, and which makes greater use of the specificities of jet lag.
  • the present invention relates to a timepiece such as a wristwatch which is in accordance with claim 1.
  • the present invention provides a timepiece capable of indicating two time zones by means of a single hour hand, this hand indicating the choice of the time of a first or second time zone and passing successively from the indication of one of these hours to the other by the action of the wearer.
  • L local time, or time zone
  • H reference time
  • the figure 1 illustrates the display of local time "L” by the display means of the timepiece of this example.
  • the figure 2 illustrates the display of a reference time "H" by the same display means.
  • These display means comprise a main dial (referenced C ) above which rotates conventionally an hour hand H and a minute hand.
  • a date hand D rotates over a second smaller dial which is subdivided into 31 divisions to indicate the date.
  • a third dial associated with a hand j / n making a turn in 24 hours is still planned to give an indication of the day or the night.
  • a needle s two positions (L and H) is used to indicate which of the local time or the reference time corresponds to the time displayed.
  • needle s selection shows the letter "L" indicating that the time displayed is the local time. So it's 7:08 in Los Angeles.
  • the day / night hand d / n points to the beginning of the night. We can conclude that it is in fact 19h08.
  • An additional needle D also linked to the hour hand H indicates the date of 31.
  • the selection of needle s rotates and moves to the "H" Dial C.
  • the hour hand H swivels and moves 9 hours, which corresponds to the difference between the two time zones of Los Angeles and Geneva. Since the time zone corresponding to Geneva is ahead of the time zone corresponding to Los Angeles, the hour hand H pivots in a clockwise direction and is placed on the fourth index 14 of the dial C ( figure 2 ). During its rotation, the hour H drives hand day / night j / n 9 o'clock on the dial in 24 hours.
  • the day / night hand j / n will therefore be positioned on the indication of the end of the night of the dial C1 . It is therefore easy to deduce that it is 4 am in Geneva.
  • the date hand D also driven by the hour hand H will advance to the date corresponding to "1" since the hour hand H will have passed midnight. To return to the local time, it is sufficient to exert a new pressure on the pusher P.
  • the shift of a time zone relative to another time zone is at most ⁇ 23 hours (except for half-time zones). Note however that in the case of a watch that does not indicate the date, the maximum offset can be limited for example + 12h in one direction and - 11h in the other.
  • the figure 3 and 4 represent a particular embodiment of the mechanism that allows the selection between two time zones in a timepiece according to the present invention.
  • This mechanism comprises a core 18 which is designed to cooperate with one or the other of two levers 20 and 25.
  • the core 18 is carried by an axis 17 ( figure 3 ) which still carries a wheel 16 visible on the figure 10 and hereinafter called the selector output wheel.
  • the selector output wheel 16 is provided to drive the hour hand through a differential gear which will be described later in connection with the figures 10 and 11 .
  • the different gear ratios are chosen so that a half turn of the core 18, and therefore of the output wheel 16, corresponds to two turns (24 hours) performed by the hour hand. .
  • the figure 5 allows to understand in more detail the operation of one of the two levers provided to cooperate with the heart 18.
  • the lever 20 is intended to pivot about an axis 23 whose one end is engaged in an opening in the board of a fixed wheel 19 ( figure 3 ).
  • the view from above shows that the lever 20 comprises a hammer-shaped arm (referenced 20 ") and a spout (referenced 20 ')
  • the spout 20' is provided to cooperate with the internal toothing 22 'of a crown 22.
  • the figure 5 also shows that a spring 21 is provided to return the lever 20 against the internal toothing 22 'of the ring gear 22.
  • This ring is rotatably mounted on the cylindrical shoulder (not shown) of an annular flange 28 (visible on the figure 3 ) which in particular fulfills the function of centering ring.
  • the ring 22 can thus turn around, and coaxially with, the core 18 and the axis 17. According to its angular position, the ring 22 presents alternately a tooth 22 'or a vacuum at the spout 20' of the lever 20. When the spout 20 'is facing one of the inner teeth, it pushes the lever, and is therefore lowered the hammer 20. "The latter is thus pressed against the heart 18.
  • the lever 25 is mounted to pivot about an axis whose one end is engaged in an opening of the plate of a wheel 24 ( figure 3 ).
  • the spout 25 'of the lever 25 encounters a tooth 27' of the selection ring 27, the hammer 25 "is forced against the heart 18, which has the effect of rotating the heart to cause it to occupy a predetermined rest position relative to the hammer 25 ".
  • the spring 26 can recall the lever 25 so as to lift the hammer 25 "and to release the heart 18.
  • the pivot 23 of the lever 20 is fixed, while the pivot of the lever 25 is integral with the plate of a moving wheel 24 (shown in FIG. figure 3 ) which is rotatably mounted on the axis 17.
  • a moving wheel 24 shown in FIG. figure 3
  • the angular offset between the lever 20 and the lever 25 can be varied.
  • the core 18 can be brought into one or the other of two angular positions, depending on whether it is the lever 20 or the lever 25 'which is active.
  • the core 18 is provided to drive the rotating hour hand. So, as visible at the figure 4 by constraining either the lever 20 or the lever 25 against the heart, the display is controlled to indicate either the time of a first time zone or that of another time zone.
  • reference time the time indicated by the needles when the lever 20 is active
  • local time the time indicated by the needles when the lever 25 is active.
  • the Figures 5 to 9 illustrate the control of the selection mechanism just described.
  • the column wheel comprises a star 30 provided to cooperate with the pusher 29.
  • the star 30 By actuating the push button 29, the star 30, which is held by the jumper 31, is advanced by one step.
  • the star 30 has twelve teeth, the column wheel rotates 30 ° (one twelfth of a turn) each time. that the pusher 29 is actuated.
  • the column wheel also carries a gear wheel 32 which is provided to drive the gear ring 22 via a gear wheel 33.
  • the selection crown 22 advances in steps of 1/24 th of a turn.
  • the internal toothing of the ring 22 has twelve teeth 22 'separated by as many voids.
  • the ring 22 successively has a tooth, then a vacuum at the nose 20 'of the lever 20.
  • the lever 20 therefore pushes the heart 18 in every other step.
  • the figure 5 still shows a spring 34, which is provided to return the pusher 29 to its initial position when the user releases it.
  • the figure 5 still shows a feeler 36 which is biased by a spring 37 against the columns 35 of the column wheel.
  • the probe 36 is mounted to pivot about an axis which is intended to carry the selection needle s ( Figures 1 and 2 ). The latter therefore indicates the display mode of the watch, based on the angular position of the column wheel.
  • the function of the pusher 29 is not limited to advancing the selection ring 22. Indeed, as already said, when the lever 20 is actuated, the lever 25 must be released, and vice versa. Thus, when the selection crown 22 advances one step, the selection crown 27 must also advance one step.
  • the figures 6 and 7 describe the driving mechanism of the selection ring 27.
  • the driving of the selection ring 27 by the pusher 29 is through a control differential dif2, so as to preserve the possibility of moving the ring 27 independently pusher 29 to change the time difference.
  • the control differential comprises the wheels 46 and 42, the transmission 47, the pinion 43 and the satellite mobile 44.
  • the pinion 43 ( figure 7 ), which is driven on the column wheel, is the first input of the differential.
  • the wheel formed by the wheel 42 driven on the return 47 is a second differential input, coaxial with the first, which is left free in rotation.
  • the satellite mobile 44 comprises a wheel and a pinion which mesh respectively with the pinion 43 and the reference 47.
  • the satellite mobile 44 is rotatably mounted around a pin 45 driven into the wheel 46 of the board.
  • the wheel 46 constitutes the differential output.
  • the control mechanism associated with the pusher 29 includes an isolator flip-flop 40 provided to block the second differential input 42 when the pusher 29 is actuated.
  • the isolator rocker 40 is controlled by a cam 39 integral with a control finger 38.
  • the control finger 38 is itself actuated by the pusher 29 via a pin 29 'driven on the pushbutton 29.
  • the cam 39 pivots and releases the isolator rocker 40 which, constrained by a spring 41, falls and blocks the differential input wheel 42.
  • the pusher 29 advances one step the star 30 (visible on the figure 5 ), and thus also the differential input gear 43, thereby rotating the satellite mobile 44.
  • the second differential input is blocked by the isolator rocker 40, the reference 47 is also blocked.
  • the differential output wheel 46 which is rotated by the satellite mobile 44.
  • the wheel 46 meshes with the selection ring 27, the latter is driven step by step by the action 29.
  • both selection rings 22 and 27 can rotate synchronously in steps of 1/24 of a turn under the action of the plunger 29.
  • the cam 39 separates the isolator rocker 40 from the teeth of the wheel 42, releasing the latter.
  • the gear train connecting the selection ring 27 to the wheel 42 is free to rotate. It is therefore possible to rotate the selection ring 27 without rotating the column wheel.
  • the figures 8 and 9 describe the mechanism provided for modifying the angular position of the lever 25 relative to the lever 20. This mechanism makes it possible to adjust the time difference between the reference time and the local time.
  • the mechanism for adjusting the time difference comprises a lower flange 50 secured to the board (not shown) and which carries a star fixed to twelve teeth 49, and a shaft 48.
  • a movable annular spring 53 is provided to cooperate with the star 49.
  • a wheel 51 and an upper flange 52 ( figure 9 ) is rotatably mounted on the shaft 48. The wheel 51 meshes with the wheel 24, and it is integral with the upper flange 52 and the annular spring 53.
  • the wheel 51 By bringing the winding stem (not shown) in the second drawn position T2 the wheel 51, and therefore the upper flange 52 and the annular spring 53 can be rotated.
  • the annular spring 53 being positioned by the star 49, the wheel 51 moves under the action of the winding stem. in steps of 1/12 th of a turn. Since the gear ratio between the wheel 51 and the wheel 24 is 1/4, the wheel 24 moves in steps of 1/48 th of a revolution.
  • the wheel 24 drives the lever 25, the return spring 26 and the selection ring 27.
  • the lever 25 is constrained against the heart 18, the wheel 24 also drives the heart itself into its seat. rotation.
  • the core 18, when rotating causes the rotation of the hour wheel 8 via the selector output wheel 16.
  • the figures 10 and 11 describe the training of the display of the hour hand H.
  • the hour hand can be driven at the same time by the selector output wheel 16 and the movement of the watch. This is the reason why, in the present example, the driving of the hour hand is done through a differential gear (referenced dif1 on the figure 11 ).
  • This differential gear comprises a first differential input mobile formed of a wheel 3 integral with a pinion 4 via the axis of the differential 3 ', and a second differential input wheel formed by a wheel 15 'and its pinion 6 which are rotatably mounted on the axis 3'.
  • the gear also includes a differential output wheel 7 which is rotatably mounted on the axis 3 ', and a satellite mobile 5 rotatably mounted around a pin g driven into the wheel board 7.
  • the mobile satellite is composed of a wheel 5 'which meshes with the pinion 6 and a pinion 5' meshing with the pinion 4.
  • an extra hour wheel 2 is driven on the hour wheel 1 of the movement.
  • This wheel 2 meshes with the first input wheel 3 of the differential gear.
  • the selector output wheel 16 meshes with the second input wheel 15 '.
  • the input wheel 3 is integral with the differential gear 4
  • the movement of the watch causes the moving satellite 5 to rotate through the pinion 4.
  • the pinion 6 is integral with the wheel 15 ', it is usually blocked by the selector output wheel 16.
  • the differential output wheel 7 which is rotated by the satellite mobile 5.
  • the differential output wheel meshes with the wheel itself. with barrel 8, thus driving the hour hand H.
  • the different gear ratios are chosen so that two turns of the 8-wheel wheel correspond to one revolution of the differential output wheel 7. The wheel 7 thus performs one revolution per twenty-four hours.
  • the embodiment which is the subject of this example also comprises a needle D provided for displaying the date, the needle D is integral in rotation with a date star 12 having 31 teeth.
  • the date star 12 is held in the position corresponding to a given date by a date jumper 13, itself constrained by a spring jumper spring 14.
  • the differential output wheel 7 accomplishes a revolution in twenty-four hours. She wears a date drive finger 11 which is provided for every day at midnight, to push a tooth of the date star 12. figure 11 shows again that the toothing of the star 12, like the drive finger 11, is symmetrical. This feature allows the date to be not only incremented, but possibly also decremented when the date associated with the local time and the date associated with the reference time are different, as was the case in the example described above. high with Geneva and Los Angeles.
  • Fig. 10 still shows a day / night display wheel 10. This wheel is driven by the barrel wheel 8 via a return 9.
  • the day / night display wheel 10 accomplishes a turn in 24 hours. and its axis carries the day / night needle j / n .
  • the control of the wheel 24 should also be adapted so that the wheel 24 moves in steps of 1/24 th of a turn rather than in steps of 1/48 th of a turn.
  • This effect can be obtained for example by reducing the gear ratio between the wheel 51 and the wheel 24 to 1 ⁇ 2.
  • the time difference is within an asymmetrical interval extending from - 11 h. at + 12h. or from 12 to 11 h
  • the top of the heart of the figure 12 is positioned at 11.30 instead of 12, allowing for maximum offsets of -11h. and + 12h.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

The invention concerns a timepiece such as a wristwatch comprising a dual time zone mechanism for indicating a reference time corresponding to the time of a location where the user of the watch normally lives and a local time corresponding to the time of a location where the user is temporarily residing. The invention is characterized in that it comprises a core (18) associated with two levers (20, 25) controlled by a common push-button (P; 29), the time shift between the local time and the time zone being adjustable by moving at least one of the levers about the core, the time shift between said local time and said reference time being determined by the position of one lever (25) relative to the other (20).

Description

La présente invention concerne une pièce d'horlogerie comprenant un mécanisme à deux fuseaux horaires.The present invention relates to a timepiece comprising a mechanism with two time zones.

Dans la plupart des montres-bracelets à double fuseau horaire, l'indication de l'heure de l'un des fuseaux horaires est fournie au moyen d'un dispositif de plus petites dimensions dont la lecture est malaisée.In most dual-time wristwatches, the time of one of the timezones is provided by means of a smaller size device which is difficult to read.

Un premier but de la présente invention est de remédier à cet inconvénient ainsi qu'à d'autres encore en proposant de simplifier l'affichage dans une pièce d'horlogerie à double fuseau horaire et en faisant indiquer sélectivement l'heure de l'un ou l'autre des deux fuseaux horaires par le même affichage.A first object of the present invention is to overcome this disadvantage as well as others by proposing to simplify the display in a timepiece dual time zone and selectively indicate the time of one either of the two time zones by the same display.

On a déjà proposé des pièces d'horlogerie dans lesquelles le même affichage pourrait indiquer sélectivement deux informations différentes. Le document de brevet CH 693'155 , notamment, décrit un mécanisme d'affichage pour montre prévu pour être commuté de manière à pouvoir afficher avec la même aiguille au moins une première et une deuxième information différente de la première. À partir des indications succinctes données par ce document, on comprend qu'un coeur solidaire de la roue porte satellite d'un engrenage planétaire est prévu pour mémoriser analogiquement la différence entre la valeur de la première et la valeur de la deuxième information, pendant que la première information (par exemple l'heure) est affichée. À cette fin, une première entrée de l'engrenage planétaire est reliée cinématiquement à l'aiguille, alors que la deuxième entrée est entraînée de manière à représenter la valeur de la deuxième information. Dans ces conditions, la position angulaire de la roue porte-satellite, ou roue de sortie de différentiel, reflète en principe l'écart existant entre la valeur prise par la deuxième information et celle indiquée par l'aiguille. Lorsque le mécanisme d'affichage est commuté sur la deuxième information, le lien cinématique entre la première information et l'aiguille est débrayé. Simultanément un marteau est abaissé contre le coeur, pour faire tourner le coeur et l'amener, lui et la roue porte-satellite, en position angulaire « zéro ». Comme l'aiguille est reliée cinématiquement à l'engrenage planétaire, elle est entraînée par celui-ci et se déplace pour indiquer la valeur prise par la deuxième information. Ensuite, tant que le mécanisme d'affichage indique la deuxième information, la roue porte-satellite est immobilisée par le marteau. Les déplacements de la deuxième roue d'entrée de différentiel sont donc transmis à l'aiguille dont la position évolue en fonction de la valeur prise par la deuxième information. D'autre part, le lien cinématique débrayable entre la première information et l'aiguille est constitué par un deuxième coeur coopérant avec un deuxième marteau. Un avantage lié au principe de fonctionnement exposé dans ce document antérieur est que les deux informations différentes à afficher n'ont pas besoin d'évoluer au même rythme. L'écart entre les valeurs des deux informations peut varier sans contraintes.Timepieces have already been proposed in which the same display could selectively indicate two different pieces of information. The patent document CH 693'155 in particular, discloses a display mechanism for a watch arranged to be switched so as to display with the same needle at least a first and a second information different from the first. From the brief indications given by this document, it is understood that a core integral with the planet wheel of a planet gear is provided for analogically storing the difference between the value of the first and the value of the second piece of information, while the first information (eg time) is displayed. For this purpose, a first input of the planetary gear is kinematically connected to the needle, while the second input is driven to represent the value of the second information. Under these conditions, the angular position of the planet wheel, or differential output wheel, in principle reflects the difference between the value taken by the second information and that indicated by the needle. When the display mechanism is switched to the second information, the kinematic link between the first information and the needle is disengaged. Simultaneously a hammer is lowered against the heart, to rotate the heart and bring him and the planet wheel, in angular position "zero". As the needle is kinematically connected to the planet gear, it is driven by it and moves to indicate the value taken by the second piece of information. Then, as long as the display mechanism indicates the second piece of information, the planet wheel is immobilized by the hammer. The movements of the second differential input wheel are therefore transmitted to the needle whose position evolves according to the value taken by the second piece of information. On the other hand, the kinematic link disengageable between the first information and the needle is constituted by a second core cooperating with a second hammer. An advantage related to the operating principle explained in this prior document is that the two different information to display do not need to evolve at the same rate. The difference between the values of the two pieces of information can vary without constraints.

Il semble qu'il serait possible d'adapter le mécanisme d'affichage décrit dans ce document de manière à indiquer l'heure de deux fuseaux horaires différents. Toutefois, le décalage horaire, ou autrement dit l'écart, entre deux fuseaux horaires, présente la particularité avantageuse de ne pas changer au cours du temps. La démarche d'adapter le mécanisme décrit ci-dessus à l'affichage de deux fuseaux horaires conduirait donc à une pièce d'horlogerie inutilement compliquée et coûteuse à réaliser.It seems that it would be possible to adapt the display mechanism described in this document to indicate the time of two different time zones. However, the time difference, or otherwise the difference, between two time zones, has the advantageous feature of not changing over time. The approach of adapting the mechanism described above to the display of two time zones would therefore lead to a timepiece that is unnecessarily complicated and expensive to produce.

La présente invention a donc également pour but de fournir une pièce d'horlogerie comprenant un mécanisme capable de faire indiquer sélectivement l'heure de l'un ou l'autre des deux fuseaux horaires par le même affichage, et qui mette davantage à profit les spécificités du décalage horaire.The present invention therefore also aims to provide a timepiece including a mechanism capable of selectively indicating the time of one or the other of the two time zones by the same display, and which makes greater use of the specificities of jet lag.

À cet effet, la présente invention concerne une pièce d'horlogerie telle qu'une montre-bracelet qui est conforme à la revendication 1.For this purpose, the present invention relates to a timepiece such as a wristwatch which is in accordance with claim 1.

Grâce à ces caractéristiques, la présente invention fournit une pièce d'horlogerie capable d'indiquer deux fuseaux horaires au moyen d'une aiguille des heures unique, cette aiguille indiquant au choix l'heure d'un premier ou d'un deuxième fuseau horaire, et passant successivement de l'indication de l'une de ces heures à l'autre par l'action du porteur.Thanks to these features, the present invention provides a timepiece capable of indicating two time zones by means of a single hour hand, this hand indicating the choice of the time of a first or second time zone and passing successively from the indication of one of these hours to the other by the action of the wearer.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée qui va suivre d'un mode de réalisation de l'invention, donnée uniquement à titre d'exemple non limitatif, et faite en référence aux dessins annexés dans lesquels:

  • la figure 1 est une vue de face du cadran de la montre selon l'invention en mode d'affichage de l'heure locale ;
  • la figure 2 est une vue de face du cadran de la montre selon l'invention en mode d'affichage de l'heure de référence ;
  • la figure 3 est une vue de côté du mécanisme de commutation entre l'heure locale et l'heure de référence ;
  • la figure 4 est une vue en perspective de dessus du mécanisme de la figure 3 ;
  • la figure 5 est une vue en perspective de dessus de la partie du mécanisme à poussoir qui commande l'affichage de l'heure de référence ;
  • la figure 6 est une vue en perspective de dessus de la partie du mécanisme à poussoir qui commande l'affichage de l'heure locale ;
  • la figure 7 est une vue en perspective de dessus qui serait identique à celle de la figure 6, si certaines roues n'avaient été omises pour laisser voire des éléments qui sont masqués sur la figure 6 ;
  • la figure 8 est une vue en perspective de dessus du mécanisme permettant de modifier le décalage horaire entre l'heure locale et l'heure de référence ;
  • la figure 9 est une vue en perspective de dessus qui serait identique à celle de la figure 8, si certaines pièces omises sur la figure 8, n'avaient pas été rajoutées ;
  • la figure 10 est une vue en perspective de dessus de l'engrenage différentiel prévu pour entraîner l'aiguille des heures et le quantième ;
  • la figure 11 est une vue en perspective de dessus de l'engrenage de la figure 10, certaines roues ayant été omises pour laisser voir des éléments qui sont masqués sur la figure 10 ;
  • la figure 12 est une vue en plan d'un coeur asymétrique qui peut être utilisé dans une variante de la présente invention.
Other features and advantages of the present invention will appear on reading the following detailed description of an embodiment of the invention, given solely by way of non-limiting example, and with reference to the accompanying drawings in FIG. which:
  • the figure 1 is a front view of the dial of the watch according to the invention in the local time display mode;
  • the figure 2 is a front view of the dial of the watch according to the invention in the display mode of the reference time;
  • the figure 3 is a side view of the switching mechanism between the local time and the reference time;
  • the figure 4 is a perspective view from above of the mechanism of the figure 3 ;
  • the figure 5 is a perspective view from above of the portion of the push mechanism that controls the display of the reference time;
  • the figure 6 is a perspective view from above of the portion of the push mechanism that controls the display of the local time;
  • the figure 7 is a perspective view from above that would be identical to that of the figure 6 , if some wheels had been omitted to leave even elements that are hidden on the figure 6 ;
  • the figure 8 is a perspective view from above of the mechanism for changing the time difference between the local time and the reference time;
  • the figure 9 is a perspective view from above that would be identical to that of the figure 8 , if certain parts omitted on the figure 8 , had not been added;
  • the figure 10 is a perspective view from above of the differential gear provided for driving the hour hand and the date;
  • the figure 11 is a perspective view from above of the gear of the figure 10 , some wheels have been omitted to reveal elements that are hidden on the figure 10 ;
  • the figure 12 is a plan view of an asymmetric heart that can be used in a variation of the present invention.

Dans tout ce qui suit, on désignera par « L » et on appellera heure locale, ou heure de fuseau, l'heure d'un lieu où le porteur de la montre selon l'invention se trouve temporairement, et on désignera par « H », et on appellera heure de référence, l'heure du lieu où le porteur a son domicile habituel.In what follows, denote by "L" and will be called local time, or time zone, the time of a place where the wearer of the watch according to the invention is temporarily, and will be designated by "H" ", And will be called reference time, the time of the place where the wearer has his usual place of residence.

La figure 1 illustre l'affichage de l'heure locale « L » par les moyens d'affichage de la pièce d'horlogerie du présent exemple. La figure 2 illustre l'affichage d'une heure de référence « H » par les mêmes moyens d'affichage. Ces moyens d'affichage comprennent un cadran principal (référencé C) au dessus duquel tourne de façon conventionnelle une aiguille des heures H et une aiguille des minutes. Une aiguille de quantième D tourne au dessus d'un deuxième cadran plus petit qui est subdivisé en 31 divisions pour indiquer la date. Un troisième cadran associé à une aiguille j/n faisant un tour en 24 heures est encore prévu pour donner une indication du jour ou de la nuit. Finalement, une aiguille s à deux positions (L et H) sert à indiquer laquelle, de l'heure locale ou de l'heure de référence, correspond à l'heure affichée.The figure 1 illustrates the display of local time "L" by the display means of the timepiece of this example. The figure 2 illustrates the display of a reference time "H" by the same display means. These display means comprise a main dial (referenced C ) above which rotates conventionally an hour hand H and a minute hand. A date hand D rotates over a second smaller dial which is subdivided into 31 divisions to indicate the date. A third dial associated with a hand j / n making a turn in 24 hours is still planned to give an indication of the day or the night. Finally, a needle s two positions (L and H) is used to indicate which of the local time or the reference time corresponds to the time displayed.

Pour expliquer le fonctionnement des moyens d'affichage des figures 1 et 2, on peut considérer l'exemple d'une personne en déplacement à Los Angeles (Etats-Unis) et désirant connaître l'heure qu'il est à Genève, lieu de résidence habituel de cette personne.To explain the operation of the display means of Figures 1 and 2 we can consider the example of a person traveling to Los Angeles (United States) and wishing to know the time it is in Geneva, the usual place of residence of this person.

Sur la figure 1 l'aiguille de sélection s indique la lettre "L" indiquant que l'heure affichée est l'heure locale. Il est donc 7h08 à Los Angeles. L'aiguille jour/nuit j/n pointe sur le début de la nuit. On peut conclure qu'il est en fait 19h08. Une aiguille supplémentaire D également liée à l'aiguille des heures H indique la date du 31.On the figure 1 needle s selection shows the letter "L" indicating that the time displayed is the local time. So it's 7:08 in Los Angeles. The day / night hand d / n points to the beginning of the night. We can conclude that it is in fact 19h08. An additional needle D also linked to the hour hand H indicates the date of 31.

Lors de la sélection du second fuseau correspondant à l'heure de référence, la personne presse sur le poussoir P disposé à 8 heures sur la carrure de la montre. L'aiguille de sélection s pivote et se place sur la lettre "H" du cadran C. L'aiguille des heures H pivote et se délace d'une valeur de 9 heures qui correspond à l'écart entre les deux fuseaux horaires de Los Angeles et de Genève. Le fuseau horaire correspondant à Genève étant en avance sur le fuseau horaire correspondant à Los Angeles, l'aiguille des heures H pivote dans le sens des aiguilles de la montre et se place sur le quatrième index 14 du cadran C (figure 2). Au cours de sa rotation, l'aiguille des heures H entraîne l'aiguille jour/nuit j/n de 9 heures sur le cadran de 24 heures. L'aiguille jour/nuit j/n se positionnera donc sur l'indication de la fin de la nuit du cadran C1. Il est donc aisé de déduire qu'il est 4 heures du matin à Genève. L'aiguille de la date D également entraînée par l'aiguille des heures H avancera jusqu'à la date correspondant au "1" puisque l'aiguille des heures H aura passé minuit. Pour revenir à l'heure locale, il suffit d'exercer une nouvelle pression sur le poussoir P.When selecting the second time corresponding to the reference time, the person presses the P button willing to 8 hours on the middle of the watch. The selection of needle s rotates and moves to the "H" Dial C. The hour hand H swivels and moves 9 hours, which corresponds to the difference between the two time zones of Los Angeles and Geneva. Since the time zone corresponding to Geneva is ahead of the time zone corresponding to Los Angeles, the hour hand H pivots in a clockwise direction and is placed on the fourth index 14 of the dial C ( figure 2 ). During its rotation, the hour H drives hand day / night j / n 9 o'clock on the dial in 24 hours. The day / night hand j / n will therefore be positioned on the indication of the end of the night of the dial C1 . It is therefore easy to deduce that it is 4 am in Geneva. The date hand D also driven by the hour hand H will advance to the date corresponding to "1" since the hour hand H will have passed midnight. To return to the local time, it is sufficient to exert a new pressure on the pusher P.

En toute généralité, pour une montre qui indique le quantième, le décalage d'un fuseau horaire par rapport à un autre fuseau horaire est au maximum de ± 23 heures (exception faite des demi-fuseaux horaires). Précisons toutefois que, dans le cas d'une montre qui n'indique pas le quantième, le décalage maximum peut être limité par exemple à + 12h dans un sens et - 11 h dans l'autre.In general, for a watch that indicates the date, the shift of a time zone relative to another time zone is at most ± 23 hours (except for half-time zones). Note however that in the case of a watch that does not indicate the date, the maximum offset can be limited for example + 12h in one direction and - 11h in the other.

La figure 3 et 4 représentent un mode de réalisation particulier du mécanisme qui permet la sélection entre deux fuseaux horaires dans une pièce d'horlogerie selon la présente invention. Ce mécanisme comprend un coeur 18 qui est prévu pour coopérer avec l'un ou l'autre de deux leviers 20 et 25. Le coeur 18 est porté par un axe 17 (figure 3) qui porte encore une roue 16 visible sur la figure 10 et appelée ci-après la roue de sortie de sélecteur. Conformément à ce qui sera expliqué plus loin, la roue de sortie de sélecteur 16 est prévue pour entraîner l'aiguille des heures par l'intermédiaire d'un engrenage différentiel qui sera décrit plus tard en relation avec les figures 10 et 11. Dans le présent exemple, les différents rapports d'engrenage sont choisis de manière à ce qu'un demi tour du coeur 18, et donc de la roue de sortie 16, corresponde à deux tours (24 heures) effectués par l'aiguille des heures.The figure 3 and 4 represent a particular embodiment of the mechanism that allows the selection between two time zones in a timepiece according to the present invention. This mechanism comprises a core 18 which is designed to cooperate with one or the other of two levers 20 and 25. The core 18 is carried by an axis 17 ( figure 3 ) which still carries a wheel 16 visible on the figure 10 and hereinafter called the selector output wheel. As will be explained below, the selector output wheel 16 is provided to drive the hour hand through a differential gear which will be described later in connection with the figures 10 and 11 . In the present example, the different gear ratios are chosen so that a half turn of the core 18, and therefore of the output wheel 16, corresponds to two turns (24 hours) performed by the hour hand. .

La figure 5 permet de comprendre plus en détail le fonctionnement d'un des deux leviers prévus pour coopérer avec le coeur 18. Le levier 20 est prévu pour pivoter autour d'un axe 23 dont une extrémité est engagée dans une ouverture aménagée dans la planche d'une roue fixe 19 (figure 3). La vue de dessus permet de voir que le levier 20 comporte un bras en forme de marteau (référencé 20") ainsi qu'un bec (référencé 20'). Le bec 20' est prévu pour coopérer avec la denture intérieure 22' d'une couronne 22. La figure 5 montre également qu'un ressort 21 est prévu pour rappeler le levier 20 contre la denture intérieure 22' de la couronne 22. Cette couronne est montée rotative sur l'épaulement cylindrique (non représenté) d'une flasque annulaire 28 (visible sur la figure 3) qui remplit notamment la fonction d'anneau de centrage. La couronne 22 peut donc tourner autour, et coaxialement avec, le coeur 18 et l'axe 17. Selon sa position angulaire, la couronne 22 présente alternativement une dent 22' ou un vide au bec 20' du levier 20. Lorsque le bec 20' est face à l'une des dents intérieures, celle-ci repousse le levier, et fait donc s'abaisser le marteau 20". Ce dernier vient ainsi presser contre le coeur 18. De façon connue de l'homme du métier, en raison du profil excentré du coeur 18, la pression du marteau 20" a pour effet de faire tourner le coeur autour de son axe, pour l'amener à occuper une position de repos prédéterminée relativement au marteau. Lorsque, en raison d'un déplacement de la couronne de sélection 22, la dent 22' est remplacée par un vide, le bec 20' est libéré. Le ressort de rappel 21 peut donc faire basculer le levier 20 de manière à soulever le marteau et à libérer le coeur.The figure 5 allows to understand in more detail the operation of one of the two levers provided to cooperate with the heart 18. The lever 20 is intended to pivot about an axis 23 whose one end is engaged in an opening in the board of a fixed wheel 19 ( figure 3 ). The view from above shows that the lever 20 comprises a hammer-shaped arm (referenced 20 ") and a spout (referenced 20 ') The spout 20' is provided to cooperate with the internal toothing 22 'of a crown 22. The figure 5 also shows that a spring 21 is provided to return the lever 20 against the internal toothing 22 'of the ring gear 22. This ring is rotatably mounted on the cylindrical shoulder (not shown) of an annular flange 28 (visible on the figure 3 ) which in particular fulfills the function of centering ring. The ring 22 can thus turn around, and coaxially with, the core 18 and the axis 17. According to its angular position, the ring 22 presents alternately a tooth 22 'or a vacuum at the spout 20' of the lever 20. When the spout 20 'is facing one of the inner teeth, it pushes the lever, and is therefore lowered the hammer 20. "The latter is thus pressed against the heart 18. In a manner known to those skilled in the art, in Due to the eccentric profile of the core 18, the pressure of the hammer 20 "has the effect of rotating the core about its axis, to cause it to occupy a predetermined rest position relative to the hammer. When, due to a displacement of the selection ring 22, the tooth 22 'is replaced by a vacuum, the spout 20' is released. The return spring 21 can therefore tilt the lever 20 so as to lift the hammer and release the heart.

Le deuxième levier (visible sur la figure 4 et référencé 25) du mécanisme de sélection est prévu pour coopérer avec la denture intérieure d'une couronne 27 pour fonctionner de manière tout à fait analogue à celle du levier 20. On peut voir sur les figures 3 et 4 que la flasque annulaire 28 occupe une position intercalaire entre la couronne 22 et la couronne 27. Cet arrangement permet à la flasque 28 d'assurer le guidage en rotation des deux couronnes 22 et 27.The second lever (visible on the figure 4 and referenced 25) of the selection mechanism is provided to cooperate with the internal toothing of a ring 27 to operate in a manner quite similar to that of the lever 20. It can be seen on the Figures 3 and 4 that the annular flange 28 occupies an intermediate position between the ring 22 and the ring 27. This arrangement allows the flange 28 to ensure the rotational guidance of the two rings 22 and 27.

Le levier 25 est monté pour pivoter autour d'un axe dont une extrémité est engagée dans une ouverture du plateau d'une roue 24 (figure 3). Comme précédemment, lorsque le bec 25' du levier 25 rencontre une dent 27' de la couronne de sélection 27, le marteau 25" est contraint contre le coeur 18, ce qui a pour effet de faire tourner le coeur pour l'amener à occuper une position de repos prédéterminée relativement au marteau 25". Lorsque la dent 27' est remplacée par un vide, le ressort 26 peut rappeler le levier 25 de manière à soulever le marteau 25" et à libérer le coeur 18. Précisons que, conformément à ce qui sera expliqué plus loin, les positions des deux couronnes de sélections 22 et 27 relativement aux leviers 20 et 25 sont déterminées de manière à ce que lorsque le marteau 20" est abaissé, le marteau 25" est soulevé, et inversement. La commande des couronnes de sélection 22 et 27 constitue donc ce qu'on appelle un mécanisme à deux temps.The lever 25 is mounted to pivot about an axis whose one end is engaged in an opening of the plate of a wheel 24 ( figure 3 ). As previously, when the spout 25 'of the lever 25 encounters a tooth 27' of the selection ring 27, the hammer 25 "is forced against the heart 18, which has the effect of rotating the heart to cause it to occupy a predetermined rest position relative to the hammer 25 ". When the tooth 27 'is replaced by a vacuum, the spring 26 can recall the lever 25 so as to lift the hammer 25 "and to release the heart 18. Let us specify that, in accordance with what will be explained later, the positions of the two Selection rings 22 and 27 relative to the levers 20 and 25 are determined so that when the hammer 20 "is lowered, the hammer 25" is lifted, and vice versa, the control of the selection crowns 22 and 27 therefore constitutes what a two-step mechanism is called.

Comme on l'a déjà mentionné, dans le présent mode de réalisation, le pivot 23 du levier 20 est fixe, alors que le pivot du levier 25 est solidaire du plateau d'une roue mobile 24 (représentée dans la figure 3) qui est montée rotative sur l'axe 17. On comprendra donc, qu'en faisant tourner la roue 24, on peut faire varier le décalage angulaire entre le levier 20 et le levier 25. Ainsi, lorsque les deux leviers occupent des positions décalées, le coeur 18 peut être amené dans l'une ou l'autre de deux positions angulaires, selon que c'est le levier 20 ou le levier 25' qui est actif.As already mentioned, in the present embodiment, the pivot 23 of the lever 20 is fixed, while the pivot of the lever 25 is integral with the plate of a moving wheel 24 (shown in FIG. figure 3 ) which is rotatably mounted on the axis 17. It will thus be understood that by turning the wheel 24, the angular offset between the lever 20 and the lever 25 can be varied. Thus, when the two levers occupy offset positions , the core 18 can be brought into one or the other of two angular positions, depending on whether it is the lever 20 or the lever 25 'which is active.

Comme on l'a vu, le coeur 18 est prévu pour entraîner l'aiguille des heures en rotation. Ainsi, comme visible à la figure 4, en contraignant, soit le levier 20, soit le levier 25 contre le coeur, on commande l'affichage pour indiquer soit l'heure d'un premier fuseau horaire, soit celle d'un autre fuseau horaire. Dans la suite de cette description on appellera « heure de référence » l'heure indiquée par les aiguilles lorsque le levier 20 est actif, et on appellera « heure locale » l'heure indiquée par les aiguilles lorsque le levier 25 est actif. On comprendra également de ce qui précède que, conformément à l'invention, les heures des deux fuseaux ne sont pas gérées comme deux heures indépendantes, mais bien en fonction du décalage que présente l'heure locale par rapport à l'heure de référence.As has been seen, the core 18 is provided to drive the rotating hour hand. So, as visible at the figure 4 by constraining either the lever 20 or the lever 25 against the heart, the display is controlled to indicate either the time of a first time zone or that of another time zone. In the following description will be called "reference time" the time indicated by the needles when the lever 20 is active, and will be called "local time" the time indicated by the needles when the lever 25 is active. It will also be understood from the foregoing that, in accordance with the invention, the times of the two time zones are not managed as two independent hours, but according to the time difference of the local time with respect to the reference time.

Les figures 5 à 9 illustrent la commande du mécanisme de sélection qui vient d'être décrit. On voit notamment sur la figure 5 un poussoir 29, une roue à colonnes (formée par l'assemblage des éléments coaxiaux 30, 32 et 35), ainsi qu'un sautoir 31. La roue à colonnes comporte une étoile 30 prévue pour coopérer avec le poussoir 29. En actionnant le poussoir 29, on fait avancer d'un pas l'étoile 30 qui est maintenue par le sautoir 31. Comme l'étoile 30 compte douze dents, la roue à colonnes effectue une rotation de 30° (soit un douzième de tour) chaque fois que le poussoir 29 est actionné. On voit sur la figure 5 que la roue à colonnes porte également une roue dentée 32 qui est prévue pour entraîner la couronne de sélection 22 par l'intermédiaire d'un renvoi 33. Le rapport d'engrenage entre la roue dentée 32 et la couronne de sélection 22 et de 1/2. Ainsi, la couronne de sélection 22 avance par pas d'un 1/24ème de tour. La denture intérieure de la couronne 22 comptant douze dents 22' séparées par autant de vides. La couronne 22 présente successivement une dent, puis un vide au bec 20' du levier 20. Le levier 20 pousse donc le coeur 18 lors d'un pas sur deux. La figure 5 montre encore un ressort 34, qui est prévu pour rappeler le poussoir 29 dans sa position initiale lorsque l'utilisateur le relâche.The Figures 5 to 9 illustrate the control of the selection mechanism just described. We see in particular on the figure 5 a pusher 29, a column wheel (formed by the assembly of the coaxial elements 30, 32 and 35), and a jumper 31. The column wheel comprises a star 30 provided to cooperate with the pusher 29. By actuating the push button 29, the star 30, which is held by the jumper 31, is advanced by one step. As the star 30 has twelve teeth, the column wheel rotates 30 ° (one twelfth of a turn) each time. that the pusher 29 is actuated. We see on the figure 5 that the column wheel also carries a gear wheel 32 which is provided to drive the gear ring 22 via a gear wheel 33. The gear ratio between the gear wheel 32 and the gear ring 22 and 1 / 2. Thus, the selection crown 22 advances in steps of 1/24 th of a turn. The internal toothing of the ring 22 has twelve teeth 22 'separated by as many voids. The ring 22 successively has a tooth, then a vacuum at the nose 20 'of the lever 20. The lever 20 therefore pushes the heart 18 in every other step. The figure 5 still shows a spring 34, which is provided to return the pusher 29 to its initial position when the user releases it.

La figure 5 montre encore un palpeur 36 qui est rappelé par un ressort 37 contre les colonnes 35 de la roue à colonnes. Le palpeur 36 est monté pour pivoter autour d'un axe qui est prévu pour porter l'aiguille de sélection s (figures 1 et 2). Cette dernière indique donc le mode d'affichage de la montre, sur la base de la position angulaire de la roue à colonne.The figure 5 still shows a feeler 36 which is biased by a spring 37 against the columns 35 of the column wheel. The probe 36 is mounted to pivot about an axis which is intended to carry the selection needle s ( Figures 1 and 2 ). The latter therefore indicates the display mode of the watch, based on the angular position of the column wheel.

La fonction du poussoir 29 ne se limite pas à faire avancer la couronne de sélection 22. En effet, comme on l'a déjà dit, lorsque le levier 20 est actionné, le levier 25 doit être relâché, et inversement. Ainsi, lorsque la couronne de sélection 22 avance d'un pas, la couronne de sélection 27 doit également avancer d'un pas. Les figures 6 et 7 décrivent le mécanisme d'entraînement de la couronne de sélection 27. L'entraînement de la couronne de sélection 27 par le poussoir 29 se fait au travers d'un différentiel de commande dif2, de façon à préserver la possibilité de déplacer la couronne 27 indépendamment du poussoir 29 pour modifier le décalage horaire. Le différentiel de commande comprend les roues 46 et 42, le renvoi 47, le pignon 43 ainsi que le mobile de satellite 44. Le pignon 43 (figure 7), qui chassé sur la roue à colonnes, constitue la première entrée du différentiel. Le mobile constitué par la roue 42 chassée sur le renvoi 47 constitue une deuxième entrée de différentiel, coaxiale à la première, qui est laissée libre en rotation. Le mobile de satellite 44 comprend une roue et un pignon qui engrènent respectivement avec le pignon 43 et le renvoi 47. Le mobile de satellite 44 est monté rotatif autour d'une goupille 45 chassée dans la planche de la roue 46. La roue 46 constitue la sortie de différentiel.The function of the pusher 29 is not limited to advancing the selection ring 22. Indeed, as already said, when the lever 20 is actuated, the lever 25 must be released, and vice versa. Thus, when the selection crown 22 advances one step, the selection crown 27 must also advance one step. The figures 6 and 7 describe the driving mechanism of the selection ring 27. The driving of the selection ring 27 by the pusher 29 is through a control differential dif2, so as to preserve the possibility of moving the ring 27 independently pusher 29 to change the time difference. The control differential comprises the wheels 46 and 42, the transmission 47, the pinion 43 and the satellite mobile 44. The pinion 43 ( figure 7 ), which is driven on the column wheel, is the first input of the differential. The wheel formed by the wheel 42 driven on the return 47 is a second differential input, coaxial with the first, which is left free in rotation. The satellite mobile 44 comprises a wheel and a pinion which mesh respectively with the pinion 43 and the reference 47. The satellite mobile 44 is rotatably mounted around a pin 45 driven into the wheel 46 of the board. The wheel 46 constitutes the differential output.

Le mécanisme de commande associé au poussoir 29 comprend une bascule d'isolateur 40 prévue pour venir bloquer la deuxième entrée de différentielle 42 lorsque le poussoir 29 est actionné. On voit sur la figure 6, que la bascule d'isolateur 40 est commandée par une came 39 solidaire d'un doigt de commande 38. On peut voir également que le doigt de commande 38 est lui-même actionné par le poussoir 29 via une goupille 29' chassée sur le poussoir 29. Lors d'une pression sur le poussoir 29, la came 39 pivote et libère la bascule d'isolateur 40 qui, contrainte par un ressort 41, tombe et vient bloquer la roue d'entrée de différentiel 42. Continuant sa course, le poussoir 29 fait avancer d'un pas l'étoile 30 (visible sur la figure 5), et donc également le pignon d'entrée de différentiel 43, entraînant ainsi en rotation le mobile de satellite 44. La deuxième entrée de différentiel étant bloquée par la bascule d'isolateur 40, le renvoi 47 est également bloqué. Ainsi, c'est la roue de sortie de différentiel 46 qui est entraînée en rotation par le mobile de satellite 44. Comme la roue 46 engrène elle-même avec la couronne de sélection 27, cette dernière est entraînée pas à pas par l'action du poussoir 29. Grâce au mécanisme qui vient d'être décrit, les deux couronnes de sélection 22 et 27 peuvent tourner de façon synchrone, par pas de 1/24ème de tour, sous l'action du poussoir 29. Une fois la pression sur le poussoir 29 relâchée, ce dernier reprend sa place sous l'effet du ressort 34, et la goupille 29' ramène le doigt de commande 38. Ainsi, la came 39 écarte la bascule d'isolateur 40 des dents de la roue 42, libérant cette dernière. Ainsi, lorsque le poussoir 29 est relâché, le train d'engrenages reliant la couronne de sélection 27 à la roue 42 est libre de tourner. Il est donc possible de faire tourner la couronne de sélection 27 sans faire tourner la roue à colonnes.The control mechanism associated with the pusher 29 includes an isolator flip-flop 40 provided to block the second differential input 42 when the pusher 29 is actuated. We see on the figure 6 , that the isolator rocker 40 is controlled by a cam 39 integral with a control finger 38. It can also be seen that the control finger 38 is itself actuated by the pusher 29 via a pin 29 'driven on the pushbutton 29. When pressing on the pusher 29, the cam 39 pivots and releases the isolator rocker 40 which, constrained by a spring 41, falls and blocks the differential input wheel 42. Continuing its travel, the pusher 29 advances one step the star 30 (visible on the figure 5 ), and thus also the differential input gear 43, thereby rotating the satellite mobile 44. The second differential input is blocked by the isolator rocker 40, the reference 47 is also blocked. Thus, it is the differential output wheel 46 which is rotated by the satellite mobile 44. As the wheel 46 meshes with the selection ring 27, the latter is driven step by step by the action 29. with the push mechanism just described, both selection rings 22 and 27 can rotate synchronously in steps of 1/24 of a turn under the action of the plunger 29. once the pressure on the pusher 29 released, the latter resumes its place under the effect of the spring 34, and the pin 29 'returns the control finger 38. Thus, the cam 39 separates the isolator rocker 40 from the teeth of the wheel 42, releasing the latter. Thus, when the pusher 29 is released, the gear train connecting the selection ring 27 to the wheel 42 is free to rotate. It is therefore possible to rotate the selection ring 27 without rotating the column wheel.

Les figures 8 et 9 décrivent le mécanisme prévu pour modifier la position angulaire du levier 25 relativement au levier 20. Ce mécanisme permet de régler le décalage horaire entre l'heure de référence et l'heure locale. Le mécanisme de réglage du décalage horaire comprend une flasque inférieure 50 solidaire de la planche (non représentée) et qui porte une étoile fixe à douze dents 49, ainsi qu'un arbre 48. Un ressort annulaire mobile 53 est prévu pour coopérer avec l'étoile 49. Une roue 51 et une flasque supérieure 52 (figure 9) sont montées rotatives sur l'arbre 48. La roue 51 engrène avec la roue 24, et elle est solidaire de la flasque supérieure 52 ainsi que du ressort annulaire 53. En amenant la tige de remontoir (non représentée) en deuxième position tirée T2, on peut faire tourner la roue 51, et donc la flasque supérieure 52 ainsi que le ressort annulaire 53. Le ressort annulaire 53 étant positionné par l'étoile 49, la roue 51 se déplace, sous l'action de la tige de remontoir, par pas de 1/12ème de tour. Le rapport d'engrenage entre la roue 51 et la roue 24 étant de 1/4, la roue 24 se déplace donc par pas de 1/48ème de tour. Dans sa rotation, la roue 24 entraîne le levier 25, le ressort de rappel 26 et la couronne de sélection 27. De plus, si le levier 25 est contraint contre le coeur 18, la roue 24 entraîne également le coeur lui-même dans sa rotation. De plus, le coeur 18, lorsqu'il tourne, provoque la rotation de la roue des heures 8 via la roue de sortie de sélecteur 16.The figures 8 and 9 describe the mechanism provided for modifying the angular position of the lever 25 relative to the lever 20. This mechanism makes it possible to adjust the time difference between the reference time and the local time. The mechanism for adjusting the time difference comprises a lower flange 50 secured to the board (not shown) and which carries a star fixed to twelve teeth 49, and a shaft 48. A movable annular spring 53 is provided to cooperate with the star 49. A wheel 51 and an upper flange 52 ( figure 9 ) is rotatably mounted on the shaft 48. The wheel 51 meshes with the wheel 24, and it is integral with the upper flange 52 and the annular spring 53. By bringing the winding stem (not shown) in the second drawn position T2 the wheel 51, and therefore the upper flange 52 and the annular spring 53 can be rotated. The annular spring 53 being positioned by the star 49, the wheel 51 moves under the action of the winding stem. in steps of 1/12 th of a turn. Since the gear ratio between the wheel 51 and the wheel 24 is 1/4, the wheel 24 moves in steps of 1/48 th of a revolution. In its rotation, the wheel 24 drives the lever 25, the return spring 26 and the selection ring 27. In addition, if the lever 25 is constrained against the heart 18, the wheel 24 also drives the heart itself into its seat. rotation. In addition, the core 18, when rotating, causes the rotation of the hour wheel 8 via the selector output wheel 16.

Les figures 10 et 11 décrivent l'entraînement de l'affichage de l'aiguille des heures H. L'aiguille des heures peut être entraînée tout à la fois par la roue de sortie de sélecteur 16 et par le mouvement de la montre. C'est la raison pour laquelle, dans le présent exemple, l'entraînement de l'aiguille des heures se fait au travers d'un engrenage différentiel (référencé dif1 sur la figure 11). Cet engrenage différentiel comprend un premier mobile d'entrée de différentiel formé d'une roue 3 solidaire d'un pignon 4 par l'intermédiaire de l'axe du différentiel 3', et un deuxième mobile d'entrée de différentiel formé par une roue 15' et son pignon 6 qui sont montés rotatif sur l'axe 3'. L'engrenage comprend également une roue 7 de sortie de différentiel qui est montée rotative sur l'axe 3', ainsi qu'un mobile de satellite 5 monté rotatif autour d'une goupille g chassée dans la planche de la roue 7. Le mobile de satellite est composé d'une roue 5' qui engrène avec le pignon 6 et d'un pignon 5" engrenant avec le pignon 4.The figures 10 and 11 describe the training of the display of the hour hand H. The hour hand can be driven at the same time by the selector output wheel 16 and the movement of the watch. This is the reason why, in the present example, the driving of the hour hand is done through a differential gear (referenced dif1 on the figure 11 ). This differential gear comprises a first differential input mobile formed of a wheel 3 integral with a pinion 4 via the axis of the differential 3 ', and a second differential input wheel formed by a wheel 15 'and its pinion 6 which are rotatably mounted on the axis 3'. The gear also includes a differential output wheel 7 which is rotatably mounted on the axis 3 ', and a satellite mobile 5 rotatably mounted around a pin g driven into the wheel board 7. The mobile satellite is composed of a wheel 5 'which meshes with the pinion 6 and a pinion 5' meshing with the pinion 4.

Comme on peut le voir sur les figures 10 et 11, une roue des heures supplémentaire 2 est chassée sur la roue des heures 1 du mouvement. Cette roue 2 engrène avec la première roue d'entrée 3 de l'engrenage différentiel. On peut voir également que la roue de sortie de sélecteur 16 engrène avec la deuxième roue d'entrée 15'. Comme la roue d'entrée 3 est solidaire du pignon de différentiel 4, le mouvement de la montre entraîne le mobile de satellite 5 en rotation par l'intermédiaire du pignon 4. Comme le pignon 6 est solidaire de la roue 15', il est habituellement bloqué par la roue de sortie de sélecteur 16. Ainsi, c'est la roue de sortie de différentiel 7 qui est entraînée en rotation par le mobile de satellite 5. Enfin, la roue de sortie de différentiel engrène elle-même avec la roue à canon 8, entraînant ainsi l'aiguille des heures H. Dans le présent exemple, les différents rapports d'engrenages sont choisis de manière à ce que deux tours de la roue à canon 8 correspondent à un tour de la roue de sortie de différentiel 7. La roue 7 effectue donc un tour par vingt-quatre heures.As can be seen on the figures 10 and 11 , an extra hour wheel 2 is driven on the hour wheel 1 of the movement. This wheel 2 meshes with the first input wheel 3 of the differential gear. It can also be seen that the selector output wheel 16 meshes with the second input wheel 15 '. As the input wheel 3 is integral with the differential gear 4, the movement of the watch causes the moving satellite 5 to rotate through the pinion 4. As the pinion 6 is integral with the wheel 15 ', it is usually blocked by the selector output wheel 16. Thus, it is the differential output wheel 7 which is rotated by the satellite mobile 5. Finally, the differential output wheel meshes with the wheel itself. with barrel 8, thus driving the hour hand H. In the present example, the different gear ratios are chosen so that two turns of the 8-wheel wheel correspond to one revolution of the differential output wheel 7. The wheel 7 thus performs one revolution per twenty-four hours.

Comme on l'a vu, le mode de réalisation qui fait l'objet du présent exemple, comporte également une aiguille D prévue pour afficher le quantième, L'aiguille D est solidaire en rotation d'une étoile de quantième 12 comptant 31 dents. Comme on peut le voir sur les figures 10 et 11, l'étoile de quantième 12 est maintenue dans la position correspondant à une date donnée par un sautoir de quantième 13, lui-même contraint par un ressort de sautoir de quantième 14. D'autre part, comme on l'a déjà dit, la roue de sortie de différentiel 7 accomplit un tour en vingt-quatre heures. Elle porte un doigt d'entraînement de quantième 11 qui est prévu pour, chaque jour à minuit, pousser d'une dent l'étoile de quantième 12. La figure 11 montre encore que la denture de l'étoile 12, comme le doigt d'entraînement 11, est symétrique. Cette caractéristique permet au quantième d'être non seulement incrémenté, mais éventuellement aussi décrémenté lorsque la date associée à l'heure locale et celle associée à l'heure de référence sont différentes, comme c'était notamment le cas dans l'exemple décrit plus haut avec Genève et Los Angeles.As we have seen, the embodiment which is the subject of this example, also comprises a needle D provided for displaying the date, the needle D is integral in rotation with a date star 12 having 31 teeth. As can be seen on the figures 10 and 11 , the date star 12 is held in the position corresponding to a given date by a date jumper 13, itself constrained by a spring jumper spring 14. On the other hand, as has already been said, the differential output wheel 7 accomplishes a revolution in twenty-four hours. She wears a date drive finger 11 which is provided for every day at midnight, to push a tooth of the date star 12. figure 11 shows again that the toothing of the star 12, like the drive finger 11, is symmetrical. This feature allows the date to be not only incremented, but possibly also decremented when the date associated with the local time and the date associated with the reference time are different, as was the case in the example described above. high with Geneva and Los Angeles.

La figue 10 montre encore une roue d'affichage jour/nuit 10. Cette roue est entraînée par la roue à canon 8 par l'intermédiaire d'un renvoi 9. La roue d'affichage jour/nuit 10 accomplit un tour en 24 heures et son axe porte l'aiguille jour/nuit j/n.Fig. 10 still shows a day / night display wheel 10. This wheel is driven by the barrel wheel 8 via a return 9. The day / night display wheel 10 accomplishes a turn in 24 hours. and its axis carries the day / night needle j / n .

On comprendra en outre que diverses modifications et/ou améliorations évidentes pour un homme du métier peuvent être apportées au mode de réalisation qui fait l'objet de la présente description sans sortir du cadre de la présente invention définie par les revendications annexées. En particulier, au lieu de prévoir un seul coeur 18 présentant une épaisseur relativement importante, il est possible d'utiliser deux coeurs d'épaisseur réduite qui sont coaxiaux et solidaires en rotation. Selon cette variante, un des coeurs pourrait être disposé au niveau de la couronne de sélection 22 pour coopérer avec le levier 20, et l'autre coeur pourrait être disposé au niveau de la couronne 27 pour coopérer avec le levier 25.It will be further understood that various modifications and / or improvements obvious to those skilled in the art can be made to the embodiment which is the subject of the present description without departing from the scope of the present invention defined by the appended claims. In particular, instead of providing a single core 18 having a relatively large thickness, it is possible to use two cores of reduced thickness which are coaxial and integral in rotation. according to this variant, one of the hearts could be disposed at the level of the selection ring 22 to cooperate with the lever 20, and the other heart could be disposed at the level of the ring 27 to cooperate with the lever 25.

D'autre part, on a vu que le décalage d'un fuseau horaire par rapport à un autre fuseau peut aller de - 23h. à + 23h. C'est la raison pour laquelle, dans le mode de réalisation qui a été décrit en détail, un tour du coeur 18 et donc de la roue de sortie de sélecteur 16 correspond à 48 heures. Toutefois, nous avons déjà dit que, dans le cas d'une montre qui n'indique pas le quantième, le décalage horaire se limite à des valeurs comprises dans un intervalle inférieur à 24 heures. L'homme du métier comprendra donc que le mode de réalisation décrit pourrait être facilement adapté à cet intervalle plus petit. En particulier, un tour du coeur 18 et donc de la roue de sélecteur 16 pourrait ainsi correspondre à 24 heures. Dans ces conditions, la commande de la roue 24 devrait également être adaptée pour que la roue 24 se déplace par pas de 1/24ème de tour plutôt que par pas de 1/48ème de tour. Cet effet peut être obtenu par exemple en réduisant le rapport d'engrenage entre la roue 51 et la roue 24 à ½. Dans le cas où le décalage horaire est compris dans un intervalle asymétrique s'étendant de - 11 h. à + 12h. ou de - 12h à + 11 h., il est avantageux d'utiliser pour le coeur 18 un coeur asymétrique comme celui représenté par la figure 12. En effet, le sommet du coeur de la figure 12 est positionné à 11 h.30 au lieu de 12h., ce qui permet d'accommoder des décalages maximum de -11h. et + 12h.On the other hand, we have seen that the shift of one time zone compared to another time zone can go from - 23h. at + 23h. This is the reason why, in the embodiment which has been described in detail, a turn of the core 18 and thus of the selector output wheel 16 corresponds to 48 hours. However, we have already said that in the case of a watch that does not indicate the date, the time difference is limited to values within a range of less than 24 hours. Those skilled in the art will understand that the described embodiment could be easily adapted to this smaller range. In particular, a turn of the heart 18 and therefore of the selector wheel 16 could thus correspond to 24 hours. Under these conditions, the control of the wheel 24 should also be adapted so that the wheel 24 moves in steps of 1/24 th of a turn rather than in steps of 1/48 th of a turn. This effect can be obtained for example by reducing the gear ratio between the wheel 51 and the wheel 24 to ½. In the case where the time difference is within an asymmetrical interval extending from - 11 h. at + 12h. or from 12 to 11 h, it is advantageous to use for the heart 18 an asymmetric heart such as that represented by the figure 12 . Indeed, the top of the heart of the figure 12 is positioned at 11.30 instead of 12, allowing for maximum offsets of -11h. and + 12h.

Finalement, l'homme du métier comprendra également qu'il est éventuellement possible de réduire la complexité et le coût de fabrication de la pièce d'horlogerie de la présente invention en substituant par exemple un mécanisme de débrayage à l'un ou à chacun des deux engrenages différentiels diff1 et diff2.Finally, one skilled in the art will also understand that it is possible to reduce the complexity and the manufacturing cost of the timepiece of the present invention by substituting for example a disengaging mechanism for one or each of the two differential gears diff1 and diff2.

Claims (11)

  1. Timepiece, such as a wristwatch, including time display means (H, j/n) and a mechanism for switching said display means to indicate the time of one or other of two time zones, wherein the mechanism includes a heart-piece (18) that is mobile in rotation and connected to the time display means by a kinematic chain, characterized in that the heart-piece is arranged for cooperating selectively with a first lever (20), to make the display means indicate the time of one of the two time zones, and with a second lever (25), to make the display means indicate the time of the other time zone, wherein the switching between the first and second levers is controlled manually, and the time difference between the two time zones is determined by the relative position of one lever in relation to the other.
  2. Timepiece according to claim 1, characterized in that the time display means (H, j/n) include a twelve hour time display (H).
  3. Timepiece according to claim 1 or 2, characterized in that the time display means (H, j/n) include a twenty-four hour time display (j/n).
  4. Timepiece according to claim 3, characterized in that the gear ratios of the kinematic chain connecting the heart-piece (18) to the time display means (H, j/n) are selected such that one complete revolution of the heart-piece corresponds to 24 hours.
  5. Timepiece according to claim 4, characterized in that the heart-piece (18) is asymmetrical, wherein the tip of the heart-piece is positioned at + 11:30 or at - 11:30.
  6. Timepiece according to any of claims 1, 2 or 3, characterized in that it includes means indicating the date (D).
  7. Timepiece according to claim 6, characterized in that the gear ratios of the kinematic chain that connects the heart-piece (18) to the time display means (H, j/n) are selected such that one complete revolution of the heart-piece corresponds to 48 hours.
  8. Timepiece according to any of the preceding claims, characterized in that it includes control means for adjusting the time difference between the two time zones by altering the position of at least one of the levers (25) around the heart-piece (18).
  9. Timepiece according to claim 8, characterized in that the control means provided for adjusting the time difference include a stem that is also for winding and setting the time of the timepiece.
  10. Timepiece according to any of the preceding claims, characterized in that the kinematic chain that connects the heart-piece (18) to the time display means (H, j/n) includes a differential gear (5', 5", 6, 7, 15).
  11. Timepiece according to any of the preceding claims, characterized in that the switching between the first and second levers (20, 25) is controlled using a push-button (P; 29).
EP07727745A 2006-04-07 2007-04-03 Timepiece comprising a dual time zone mechanism Active EP2008159B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07727745A EP2008159B1 (en) 2006-04-07 2007-04-03 Timepiece comprising a dual time zone mechanism

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06007396 2006-04-07
EP07727745A EP2008159B1 (en) 2006-04-07 2007-04-03 Timepiece comprising a dual time zone mechanism
PCT/EP2007/053274 WO2007115984A2 (en) 2006-04-07 2007-04-03 Timepiece comprising a dual time zone mechanism

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EP2008159A2 EP2008159A2 (en) 2008-12-31
EP2008159B1 true EP2008159B1 (en) 2010-06-09

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DE (1) DE602007007070D1 (en)
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2013030268A1 (en) * 2011-09-01 2013-03-07 Rolex S.A. Time piece capable of displaying two time zones
EP3599520A1 (en) 2018-07-26 2020-01-29 ETA SA Manufacture Horlogère Suisse Method of permutation of the time display mode of an electronic watch with analogue display, and associated watch

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EP2128719A1 (en) * 2008-05-29 2009-12-02 Frédéric Crettex Display device
EP2136271B1 (en) * 2008-06-17 2010-12-22 Montres Breguet S.A. Display device for displaying one of two different indications using the same indicating element of a timepiece
EP2362277B1 (en) * 2010-02-25 2012-10-31 Montres Breguet SA On-demand time zone displayed on the main hand of a timepiece
EP2362276B1 (en) 2010-02-25 2012-10-31 Montres Breguet SA Programmable and reprogrammable mechanical memory wheel for a timepiece
CH703261B1 (en) * 2010-06-08 2014-11-28 Bulgari Horlogerie S A Timepiece fitted with a mobile time indication needle between two positions.
EP2444861B1 (en) * 2010-10-22 2013-05-01 Audemars Piguet (Renaud et Papi) SA Function selector
EP3462251B1 (en) * 2017-09-29 2020-06-10 Montres Breguet S.A. Time-setting mechanism for a clock movement
CH719538B1 (en) 2022-03-25 2025-10-15 Parmigian Fleurier S A A watch movement comprising a display device for at least two time zones.

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US3503203A (en) * 1967-11-14 1970-03-31 Bulova Watch Co Inc Two-zone timepiece
CH693155A5 (en) * 1998-11-04 2003-03-14 Andreas Strehler Timepiece display mechanism has single display organ switched between alternate display modes

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013030268A1 (en) * 2011-09-01 2013-03-07 Rolex S.A. Time piece capable of displaying two time zones
US9405274B2 (en) 2011-09-01 2016-08-02 Rolex Sa Time piece capable of displaying two time zones
EP3599520A1 (en) 2018-07-26 2020-01-29 ETA SA Manufacture Horlogère Suisse Method of permutation of the time display mode of an electronic watch with analogue display, and associated watch
CN110780574A (en) * 2018-07-26 2020-02-11 Eta瑞士钟表制造股份有限公司 Method for rearranging the time display mode of an electronic watch with an analog display and related watch
CN110780574B (en) * 2018-07-26 2021-04-27 Eta瑞士钟表制造股份有限公司 Method for rearranging the time display mode of an electronic watch with an analog display and related watch
US11906938B2 (en) 2018-07-26 2024-02-20 Eta Sa Manufacture Horlogere Suisse Method for permutation of the time display mode of an electronic watch with an analogue display, and the associated watch

Also Published As

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ATE470891T1 (en) 2010-06-15
EP2008159A2 (en) 2008-12-31
WO2007115984A3 (en) 2007-11-29
WO2007115984A2 (en) 2007-10-18
DE602007007070D1 (en) 2010-07-22

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