US2200110A - Time switch - Google Patents

Description

May 7, 1940. H. H. ANDERSEN TIME SWITCH Filed Feb. 24,' 1939 Pima any 1, 1940 Ylui'niirr OFFICE jrum swrron Herbert n. menen, Beverly, Man., signor to General Electric Company, a corporation of New York Application February 24, 193s, semi No. :sans

9 clammcl. zoo-ss) My invention relates to time switches audits primary object is to provide a time switch in which the levers used for setting the time of operation of the switching mechanism are arl ranged to be concentric to and indicate on a central clock dial in a practicable and simple manner. Another feature is to employ a switchV controlling lever and certain stops against which it operates as a signaling switch. A switch of l the general type to which my invention is applied is disclosed in United States Ratent No.

2,056,400, October 6, 1936. In said patent two rotary switch setting time dials are provided separate from and in addition to an ordinary clock dial. Where the switch is used as a range timer for controlling a domestic cooking range,

' for'example, the presence of the three dials, two

of which rotate, and the necessity of adjusting switch setting levers with respect to the rotating dials becomes confusing to the ordinary user of such switches. According to my invention only one stationary normal time-telling lclock dial is used for all of these time-telling and time-adjusting purposes, and the switch setting levers are adjusted concentrically about such dial in a straightforward simple manner that makes the desired adjustment a simple, Jreadily understood procedure. The main feature of my invention is in the machinsm which makes this simplification possible without introducing other objectionable complications. j

Fig. 1 o! the drawing represents an exploded perspective view of the complete switch mechanism embodying my invention.- At the right in Fig. 1 I have also represented a manual control vswitch and circuit connections often used in conjunction ywith the type of time switch represented for convenience in shifting the automatic time controllingl function to different appliances and which is of assistance herein explaining the double contact arrangement of the time switch itself. Fig. 2 represents a front perspective view of the timer in its casing,

The time switch embodies a time-telling clock which is driven in this instance by a self-starting synchronous motor the stator of which is represented at I9, the eld winding at and a rotor enclosing gear casing at I2. The motor drives a minute hand shaft I3 through a gear train I4 and a slip friction clutch I i, the clutch being provided to facilitate setting of theclock hands. The minute hand I9 is secured to the forward end of shaft I3 and is driven in a clockwise direction one revolution per hour. The hour 89 hand I1 is secured to a hollow sleeve Il concentric with minute hand shaft I3 and is driven from shaft I3 through back gears I9, 20, 2| and 22. The minute and hour hands cooperate with a twelve hour clock dial 23. It is thus seen that I have introduced no complications in the well s known simple form o f clock driving mechanism The switch which istime controlled is represented as a double pole switch having movable spring blades 24 and 25 cooperating respectively l0 with stationary contacts 26 and 21. The movable blades are mechanically connected by an insulating post 28 secured through switch blade 24. The left or rear end of post 2B as here shown rests against a movable strip of insulating matel5 rial 29. insulating strip 29 has its upper free end arranged to be moved to the right by the cam action of a lever 30 secured to a shaft 3|. In theposition shown, the high shoulder 32 of lever 30 pushes strip 29 to the right against the spring 20 tension of contact blades 24 and 25 and holds the switch contacts open. This position of lever 30, may for convenience be referred to as position I. If, now, lever 30 and its shaft 3| be rotated counter-clockwise to a position II, the low cam 25 surface at 33 will be opposite strip 29 and allow the strip together with post 28 and resilient contacts 24 vand 25 to move to the left to close the switch. Further rotation of lever 30 and shaft 3| to a position III will cause another high 30 shoulder 34 to move strip 29 back tothe right an'd open the switch again while still further rotation to a position IV will bring low part 35 Opposite strip 29 and allow the switch to close. The four positions of lever 30 just referred to 35 are approximately indicated by the dash lines labelled I, II, III, and IV. Lever 30 is urged to rotate in the counter-clockwise direction from position I to position IV by a spring 36. I-Iowever, lever 30may be held in any one of the four 40 designated positions by stops or abutments 31, 33, 39 and the lower part of strip 29 acting as an abutment.

Abutments 31 and 38 are parts of control levers 40 and 4| respectively which levers are se- 45 cured on sleeves 42 and 43 respectively and pivot on shafts 44 and 49 respectively. These abutment levers 40 and 4| are normally held in the locking positions shown by a tension spring 49 which is fastened between them. The action of 50 spring' 46 is such as to tend to rotate both levers in clockwise directions about their pivot points and against each other as shown with the abutment projections in locking position with respect to the path of travel of the end of lever ment levers are essentially alike and the parts for controlling abutment 31 will now be described.

Sleeve 42 is fastened to a clutch part 49 which vhas clutch teeth, ner than illustrated, cut in its near surface. A gear wheel 50 is rotated continuously in a counter-clockwise direction at one revolution in twelve hours byv being geared to hollow hour hand shaft I8 through gear 5l. Gear 59 is coaxial with clutch part 49 and rotates independently thereof except when these parts are clutched together. Gear 50 has an opening near its periphery through which clutch fingers 52 extend toward and in alignment with the toothed side periphery of clutch part 49but normally out of engagement therewith. These clutch flngersare a part of a spring 53 riveted to the near side of gear 50 which spring is biased to normally hold fingers 52 away from the clutch member 49. This spring clutch nger structure also includes a cam-like projection 54 extending axially forward in line with the rearward extending.clutch fingers.A This cam projection cooperates with the rounded rear end of a cam inger 55 which is fastened to and extends to therear from a gear wheel 56. Cam nger 55 is fastened near the periphery of,gear 56 and gear 55 has the same axis of rotation of gear 58 so that once per revolution of gear 58 the cam projection 54 comes against cam finger 55 and the former is forced to the rear while these parts pass each other. During this cam action teeth 52 are forced into engagement with the toothed surface of clutch part 49 and cause sleeve 42 and the parts carried thereby to rotate counter-clockwise with gear 50. When c am 54' has moved past pin 55, spring 53 pulls teeth 52 from engagement with clutch part 49 and the latter is released and it then rotates clockwise under tension of spring 46 to again bring abutment 31 into position to block counterclockwise rotation of lever 39 past this point.

The time of day when the automatic operation just described is performed depends upon the rotative position of pin 55 and this can be ad- .justd as desired by rotation of gear 55 which is in driving connection with setting pointer 41 through sleeve 51 and gear wheel 58. Sleeve 51 is concentric to hollow hour hand shaft i8 and to an intervening stationary sleeve H and is free to be rotated thereon. Pointer 41 is fastened to the forward end and gear 58 lto the rear end of sleeve 51. The parts 49, D and 55 are all rotatively mounted about a post 44 parallel with shaft I3 independently of each other except as described above. Gear- 50 rotates continuously, clutch part 42 rotates counter-clockwise a short distance when clutched to gear 58 and clockwise the same distance by spring 46 when released, and gear 56 is'rotated manually in a direction and extent determined -by the setting movement of setting pointer 41 with respect to the regular clock dial 23. A friction spring part 59 or its equivalent is preferably provided to hold gear 55 stationary except when set manually. Parts 60 are merely spacing collars; .Y

The corresponding parts which are employed for setting the time of release and for releasing arm 38 at abutment 38 are substantially duplicates of those parts which have been described and are identified by similar reference characters followed by the letter a. Setting gear 58a is on a sleeve 51a which is slightly larger and surrounds sleeve 51. Hence sleeve 51 is longer than 51a. The gear 22 which drives gear 50a is one of the back gears between the minute and hour hand shafts. The gear shown at 6l meshing with gear 50a is on a shaft 62 extending forward through the face 64 of the clock casing and is -provided with a suitable thumb piece 63 for setting the clock. This clock setting drive might be connected'at any other convenient point in the time train. For convenience the principal gears in the central group which rotate continuously with the clock have arrows indicating their directions of rotation.

In assembling the parts, pointer 41'is so rotatively positioned with respect to parts 53 and 54, and pointer 48 is so rotatively positioned with respect to par 55a and 54a, that the timesat which abutment stops 31 and 38 are withdrawn Will be indicated by the position of pointers 41 -and 48 on the clock dial 23, and this will also be consistentwith the time indicated by hands l5 and I1 on the clock dial. It is further seen that the direction of setting movement of pointer 41 about clock dial 23 is correct with respect to the direction of movement of cam finger 53 and the movement of continuously rotating cam part 54 past cam linger 55 to bring this about. For example, pointer 41 is shown set to cause withdrawal of stop abutment 31 at about 1l oclock.

If pointer 41 is now moved counter-clockwise for v an earlier setting., cam finger 55 is moved clockwise for a correspondingly earlier cam operation on cam 54. Normal setting of the clock hands also sets cams 54 and 54a accordingly Aby the proper amount and in the proper direction so that ,this does not interfere with the desired correlation arrangement for subsequent correct operation. Setting pointers 41 and -48 may be set by movement in either clockwise or counter-clockwise direction. It is thus seen that the time is indicated and the time switch setting is made all with respect to a single central stationary clock dial in its normal upright time-telling position. The time switch setting is thus made direct, simple and convenient and can moreover be made with improved accuracy because the clock dial is made much larger than it is practicable to make separate switch setting dials and at the same time keep the dimensions of the device within reasonable The mechanism which I have devised to accomplish this concentric time- .telling and switch-setting arrangement is relatively simple, compact and inexpensive. The time switch setting and operating parts are properly correlated with the time as indicated by the clock hands on the same time-tellingahd switch-seb ting dial and the only thing necessary for correct operation is to see that the clock is correct.

It will be noted that to permit free movement of setting pointers 41 and 48 about the clock dial 23 and have these pointers extend from behind, around the outer edge and indicate on the front periphery of clock dial 23, it is impossible to support the clock dial at its outer edge as is customary. The clock dial is therefore staked and supported at its center to the vforward end antonio of stationary sleeve IIb. I'he rear end fthis sleeveI is staked to and supported by a supplementary clock plate III. Stationary sleeve IIU surrounds the minute and hour hand shafts I8 and I8 and is inside of sleeves i1 and 51a. All of these parts I3, I8, IIB, 51 and 51a are concentric, the shortest being on the outside and the longest inside in order that the parts which rotate may have the necessary driving connecof setting pointers-41 and 48, and a circular open-4 ing is provided between the clock dial structure and casing H3 in which setting pointers 41 and 48 are freely movable. I'he complete dial structure including the glass and rim II2 is supported from the forward end of stationary sleeve IIII staked to the dial near its Jcenter. Y

'I'he shafts on which setting knobs 68, 88 and 85 are mounted extend through small holes in the front of the casing and these lmobs are removable `from their shafts in order that the cover casing may be removed by withdrawing it from the front. I'he central dial assembly which is inde-l pendent of the casing is not disturbed when the casing is removed.

It has been explained how the stops 31 and 38 are automatically removed from the path of switch-operating arm 30 in accordance with time-setting of pointers 41 and 48. These stops are also arranged to be 4moved out of the path oi' arm 3U when it is rotated clockwise manually from position III to position I, for example. This manual movement of arm 30 in a clockwise direction simply rotates stop levers 40 and 4I counterclockwise against the tension of spring 48 a sumcient amount to allow the end of lever 30 to clear the stop, afterA which they return to stop positions. 'I'his is analogous to an ordinary ratchet retracting operation and is inherent in the arrangement. The stop 39 at the normal switch open position III is also arranged to permit of clockwise manual rotation of arm 30 past it. For this purpose the stop 39 has a shoulder 88 and is pivoted on its center to a pin 85 and is biased in the position shown by a weight 88 resting on a stop $1. When so positioned only the upper corner 39' of this stop projects into the path of the outer end of arm 88. It will thus hold the arm from rotation past this point in a counter-clockwise direction.v However, if arm 30 be moved past this stop manually in a clockwise direction, it will rotate the stop counter-clockwiseI suillciently to allow the arm to passby the low or fiat part of the .squared s top and then the stopl will rota back to the position shown.

Arm 38 is rotated manually clockwise or cocked by means of the knob 88 on the forward end' of shaft 3|. Such rotation also winds spring 88. Shaft 3| is normally urged endwise towards the handle 88 by this same spring 88 and, if rotated while in this forward position, it will engage the various abutments in positions I, II and III past which it is rotated. However, the shaft II is arranged to have suillcient endwise play that inward pressure on handle 88 will move the shaft inward to a point where if the arm 30 be rotated, it will clear the inside end of the various stops at positions I, II and III and move past without touching the stops. The arm 30 may thus be pressed in and cocked in case an abutment such as 38 happens to be clutched to gear 50a at the time the arm 30 is manually rotated clockwise and is holding stop 38 against quick retracting movement. Also, the arm may be manually released irom any one of the stops at positions I, II and III when resting at such positions, if that is! desirable, by simply pushing in on handle 88 until the end of lever 30 clears the inner edge of the stops. The spring 36 will then rotate the lever to the next position or to the ilnal position IV, if pressure on the handle is not immediately relieved. i

If it is desired that the switch contacts 24, 26 and 25, 21 remain closed with no automatic time switch operation, lever 30 is moved to position IV.

.If it is desired that these switch contacts remain open with no automatic time switch operation, lever 38 is positioned at position III. If it is desired that the switch be closed and later opened automatically at a predetermined time, lever 30.

is cocked to position II and hand 48 is set at the time it is desired that the switch be opened. At such time stop 88 is temporarily retracted by the automatic time switch mechanism and allows arm '30 to 'rotate it position III, thus opening the switch.

If it be desired that the switch be closed at a predetermined time and opened at a later predetermined time, lever 30 is cocked to position I and lever 41 set at 'the time for the switch closing and. lever 48 set for the time of switch opening. When stop 31 is temporarily Withdrawn automatically in accordance with the time setting of lever 41, arm 3l!"r rotates from position I to position II and closes the switch. Then later stop 88 is withdrawn temporarily in accordance with the time-setting of pointer 48 and lever 30 rotates from position lI to position III to open the switch. y

It is immaterial whether the cooking actionbe made before or after the setting of levers 41 and 48 unless, of course, lever 41 be in such a position thatit will release arm 30 in setting lever 41 to the new position; Levers 41 and 48 may be rotated in either direction in setting them and if desired may be positioned as to move past each other although this is unnecessary. For example,

`with the pointers 41 and 48 in the positions shown, if it is desired to move pointer 41 tothe opposite side of pointer 48, say to the one oclock position, it may y done by simply rotating pointer 41 counter-clockwise to such position. I

prei'er to mark lever 41 with a B and lever 48 with an E, designating beginning and ending of time period during which the switch will be closed when set for automatic operation. Also the handle 88 may be provided with a pointer 69 cooperating with a dial 10 having the important positions of lever 3|! designated in some suitable way. For example,v with lever cocked for li tton 89. Other appropriate markings may be used, supplemented with suitable instructions.

Forfurther convenience in using this switch I provide a small low-voltage signal lamp 1| which is lit when lever 88 is in either of the automatic operating positions I or Il but not otherwise.

Lamp 1| has an energizing circuit consisting of a low-voltage transformer coil 12 on the stator Il of the electric-motor. The motor coil acts as the primary of this transformer. One side of this circuit is grounded after going through the lamp to the metal part of the switch structure as indicated at 18. The other side of coil 12 is connected to shaft 8| by wire 14. Shaft 8| and all metal parts connected thereto are insulated from the rest of the clock structure except at the outer end of metal lever 88. Thus shaft 8| has insulated bearing bushings such as shown at 15.

When lever 88 rests on either metal stop 81 or 88 the circuit of lamp 1| is completed back through the metal grounded part of the switch structure ras represented by the ground at 16.

At position III the lamp will not be lit sincel stop 88 is insulated from the general metal structure of the clock. Hence the lamp serves as a warning when lit that the switch is set for automatic operation. c

As a further convenience to the housewife and cook I have provided a signal bell 18 operated by the timer mechanism by means of which the desired ending of short cooking periods or other short time reminder periods may be signaled. For this purpose a shaft 18 may be connected in driving relation with the timer motor through clutch 88, gear 8| and gear 82. Shaft 18 is movable endwise. It is biased forward by a spring 88 which is also a bell clapper member and which bears against the rear end oi shaft 18. Near the front end of shaft 18 it has fastened to it an eccentric finger 84 and a pointer knob 85. Pointer knob indicates on a minute dial 88 and finger 84 cooperates with the front clock plate 84 and in the zero minute indicating position of pointer 85, finger 84 .registers with an opening 81 in the clock plate and in such position will enter, the opening under tension of 'me shaft 1s is thus heid 1n this rearward position by reason of finger 84 bearing against the rear of plate 84. In such position gears 8| and 82 are in mesh and shaft 18 is driven clockwise. in this case, at the rate of one revolution per hour. Spring 88 is under tension. In thirty minutes finger 84 will register with opening 81, shaft 18 will quickly move forward, gear 8| will be -demeshed from gear 82 and the upper end of clapperspring 88 will strike the bell, giving a signal. This mechanism then remains out of operation until reset by pushing in on knob 85 and turning it to the left to the position desired. Shaft 18 may thus be turned when pushed to the rear and gears 8| and 82 are in mesh by.:

. ample, suppose eggs boiled exactly four minutes are desired. The time required for the water to come toa boil is indefinite since it depends, .for

' example, on the original temperature of the water. As soon as the water starts to boil, the

armario.

curancy in setting and timing. This signaling.

convenience, while operated by the same timing mechanism as the time switch and clock, does not interfere with their independent or simultaneous operation, as will be more fully explainedi. A front view appearance of this timer in its casing is represented in Fig. 2 and is covered by Design Patent 110,906, August 16, 1938 to Patten. At the right in Fig. 1 I have shown a manual switch, the rotary operating shaft of which is designated by reference character 88 by means of which the automatic time switch may be selectively connected to control a circuit through a switch 8|-, a convenience outlet 82 or a switch 88. Switch 8| is assumed to lead to a cooker and switch 88 to an oven to correspond to the designations opposite pointer 84 on/shaft 88.

The supply circuit to the installation is a 220 volt circuit with a neutral wire 85 and it is assumed that the switches 8| and 88 are designed to connect the cooker and oven respectively for 220 volt operation of their respective circuits. In the position of switch 88 shown it connects theA cooker switch 8| to the supply circuit through the automatic time switch and switch 8| may be connected for -either or 220 volt operation of its circuit and have that circuit controlled by the time switch. At the same time, the circuit ,to the convenience outlet 82 is closed for 110 volt operation and the circuit to oven switch 88 is 'closed for manual operation of the oven circuit for 110l or 220 volt operation. Shaft 88 has on it five cams numbered 88 to |88 and each of these cams controls a single pole, double throw contact member cooperating with stationary contacts which for convenience may be referred to as right and left contacts according to their disposition at the right or left in the drawing.

Outside supply wire |8| does not go to any lbut that it goes directly to one side of the heater elements controlled by said switches. 'Iiming motor coll is also permanently connected across neutral wire 85 and outside wire |8| for 110 volt operation and hence runs continuously.

. jAlso the circuit of signal lamp 1| which receives energy through the motor is independent of :any .of thevswitches mentioned.

Viith the switch 88 connected as shown for automaticcontrol of the circuit through switch 8| a circuit is closed from wire |8I, circuit 8|, wire |88, right contact' 81 of switch 88, time switch contacts 25 and 21 to outside wire |82. Hence if switch 8| is connected for 220 volt operation, it' will be controlled by the time switch. Another circuit is connected from wire |8| to .switch 8| back -through wire |84, left contact 88 v0i' switch 88, contacts 28 and 24 -of the time tion from wire |0|, wire |05, right contact 99 to neutral wire 95. The 110 volt circuit to switch 93 is closed from 'wire |0|, right contact |00 of switch 90 to the neutral wire 95 and the 220 volt circuit is closed to switch 90 from wire |0|, wire |09, lett switch contact 99 to outside supply wire If, now, switch 90 be rotated 90 degrees counter-clockwise for automatic. time switch operation to outlet 92, the latter will be connected from wire |0|, wire |05, left contact 99, time switch contacts 29 and 24 to neutral wire 95. At this time a 110 volt circuit is closed to switch 9| from wire |0l, wire |09, right contact 99 to neutral 95 and a 220 volt circuit is connected from wire |0|. wire |09-, left contact 91 to wire |02.

Y At this time also a 110 volt circuit is connected to switch 93 from wire |0|, right switch contact |00 to neutral wire 95 and a 220 volt circuit is connected through wire |0|, wire |09, left contact 99 to wire |02. l

If, now, switch be turned 90 degrees 'f urther counter-clockwise, ovenswitch 99 is connected for time switch control, the 220 volt circuit being from wire |0|, wire |09, right contact 99, time switch contacts 25 and 21 to outside wire |02 and the 110 volt circuit being from wire |0| left contact |00, time switch/contacts 29l and 24 to neutral wire 95. At this time outlet 92 is connected for 110 volt operation from wire |0I, wire |05, right contact 90 to neutral Wirel 95. Also 110 and 220 volt circuits are connected to switch 9|,

the'110 volt circuit being from wire |0| wire"|0l,.

right contact 99 to neutral and the 220 volt circuit from wire |0|, wire |09, lett contact 91 to wire |02. y

When switch 90 is turned to the designation Nonautdnone of the circuits to 9|, 92 or 93 go through the time switch contacts but all are -nevertheless energized, switches 9| and 93 for either 110 or 220 volt operation. The 110 volt circuit for switch 9| is from wire |0|, wire |00, right contact` 99 to neutral and the 220 volt circuit through wire l03, left contact 91 to wire |02. The 110 volt circuit to outlet 92 is through wire |05, right contact 99 to neutral.

AThe 110 volt circuit to switch 93 is through right Contact |00 to neutral and the 220 volt cirlcuit`is through wire |06, left contact to outside The need for two independent circuits through the time switch is thus explained. These circuits at the time switch contacts should be well insulated from each other, as illustrated, and so arranged that regardless of which circuit therethrough is being used, the time switch setting procedure is the same i'for both.

It is also seen how the signal bell timer feature may be of considerable convenience in timing a cooking operation on one circuit while the time switch is in use controlling another of the circuits described. V

What I claim as new and desire to secure by Letters Patent of the United States is:

1. A timer comprising a clock dial, clock hands cooperating with said dial, minute and hour hand shafts, a motor .for driving said shafts, a switch, a pair of means driven from said hour hand shaft for controlling different operations of said switch, J a pair of adjustable means for determining the times of operation of said controlling means on said switch, said adjustable means including a pair of pointers independently adjustable about said clock dial and a pair o! rotatable sleeves outside and concentric to said minute and hour hand shafts and to which said pointers are secured, and a stationary sleeve between said shafts and pair of sleeves and concentric thereto i'or supporting said clock dial from its central position, said pointers extending from the rear about the outer edge of said clock dial tto indicate on` the front periphery thereof.

2. A timer comprising a clock dial, minute and hour hands indicating on said dial, minute and hour hand shafts, a timer motor for driving said shafts and hands, a'switch,v a rotary lever for operating said switch, said lever having a rotary positon where the switch is open and a diierent rotary position where-the switch is closed, manually wound spring means for urging said lever to rotate through said positions, stops for said lever at said positions, a pair of means driven from said hour hand shaft for temporarily removing said stops to permit rotation of said lever through f j said positions, a pair of independently adjustable means for .determining when said stops shall be removed, including sleeves concentric to and rotatable about said shafts, pointers secured to said sleevesand independently adjustable about said clock dial to indicate thereon when said switch shall clbse'and open by the removal of said stops, and a stationary sleeve between said pair of sleeves and said tshafts lfor supporting said clock dial near its center, said shafts extending through the center of said clock dial and said pointers extending from the rear about the outer edge of 'said clock dial to indicate on the front periphery thereof. v

3. In a timer, the combination ofcontact apparatus, a control member governing said contact apparatus, said control member being adapted to b e moved from a normal position to a set position, means normally tending to cause a unidirectional dreturn motion to said control member from said set position bacl'r to said normal position, a movable stop biased to a stopping position at a point in-th'e path of such return movement, time re-` sponsive driving means for actuating said stop to release said control member, said drivingmeans `including a normally disengaged clutch, cam

means for temporarily engaging said clutch to cause said tripping stop to release said control member, and means for adjusting said cam means to release said tripping means at a predetermined time. f

A4. In a timer, a switch, a lever for operating said switch adapted to be moved from a normal position to a set position, ,means normally tending to cause a unidirectional return of said lever from a set position ,back to said normal position, a pair of movable stops biased to stopping positions at different points in the path .of such return movement, a timer motor, a pair' of driving connections between said timer motor and movable stops, each connection including a normally disengaged clutch, a pair of cam `means a cocked position, a movable stop normally biased into the path of the return movement of\said lever to hold it in cocked position, a timer motor, s

against the clutch surface of said wheel to engageI said clutch and move the stop to release said lever comprising a second cam extending into the path of rotation of said first mentioned cam and adjustable about the axis of rotation of said gear wheel to select the time when said lever shall be released.

6. In a timer, a clock dial, a support, a sta tionary sleeve fastened at its rear end to said support and secured at its frontend to the central portion of said dial and comprising the sole support for said dial, minute and hour hands indicating on the front of said dial, minute and' hour hand shafts extending through said stationary sleeve and supporting said hands on their forward ends, a timing motor and gear train for driving said shafts located to the rear of said stationary sleeve and its support, switching mechanism, means operated from said gear train for operating said switching mechanism, and rotary adjustable means for adjusting and indicating the time at .which said switch shall be operated, said means including a hollowA shaft supported on said stationary sleeve and having a pointer extending radially from theforward end of said hollow shaft back of said dial to its periphery and around the edge thereof to indicate on the front of said dial.

7. In a timer, a clock dial, a support, a fixed hollow sleeve secured at its rear end in said support and secured at its forward end to the central portion of said dial and constituting the sole support for said dial, minute and hour hands indicating on the front of said dial, minute and hour hand shafts extending through said hollow sleeve and dial, a timer motor and a gear train located to the rear of said hollow sleeve' for driv` ing said shafts, a switch, means controlled by said motor for closing said switch and means controlled by said motor for opening said switch,

said control means including continuously rotary parts geared to the hour hand shaft to the rear of said stationary sleeve and normally stationary adjustable rotary parts cooperating with the continuously rotating parts for determining the time at which said switch operations shall occur, said adjustable parts being geared to and including hollow sleeves concentrically and independently rotatively mounted on said iixed hollow sleeve and pointers indicating on the front periphery of said clock dial secured to said last mentioned hollow 'sleeves to indicate'the time of occurrence of said switching operations.

8. In a timer, a switch, a metallic rotary lever for operating said switch, said lever having different rotaryl switch controlling positions in -which it may be set, movable metallic stops for positioning said lever in said different switch controlling pomtions, time controlled means for.

comprising a stationary twelve-hour clock dial,

minute and hour hands indicating on the front of said dial, minute and hour hand shafts extending from the rear through said dial at its center for driving said hands, automatic operation time adjusting levers indicatingon and independently adjustable about the front periphery of said dial, hollow shafts concentric with said minute and hour hand shafts and surrounding them to which said adjusting levers are secured behindlsaid dial and a fixed hollow sleeve outside of the minute and hour hand shafts and inside of said hollowshafts comprising the sole support of said dial, said dial being secured near its center to the i'ront end o'f said fixed hollow sleeve.

. I-mRBERT H. ANDERSEN.

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