DE1200929B - Trip device for switch - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

HOIh

German class: 21 c - 69

Number: 1 200 929

File number: A 37922 VIII b / 21 c

Filing date: July 19, 1961

Opening day: September 16, 1965

The invention relates to a trip device for switches with one or more movable contact levers provided with contacts and interacting with fixed contacts are equipped. In known tripping devices, the one carrying the movable contacts takes Contact lever has two separate positions, namely the switch-on position and the switch-off position, the transition from one position to the other when triggered by stepping back a stop, a hook or the like. Caused which holds the contact lever in a position in which the contacts are closed during the closure of the switch getting closed. The retrieval of this stop or hook is generally done by controlled by a finger that responds to an overcurrent from the outside or by a finger Bimetal strip is actuated.

With such switches it has already become known to provide a vibrating impact member, which is locked in the on position of the switch and for adjusting the contact lever or levers at Switching off is used. The impact member used in the known switches acts directly on the Contact lever that this is taken. This embodiment is disadvantageous in that if this contact lever has considerable inertia, to carry out a momentary interruption of the current a relatively large spring is required, which is structurally and cost-wise requires a certain amount of effort. In addition, in these known devices, the Pivoting movement of the release lever causing energy not from a spring, but from a Bimetallic strip supplied, which due to its thermal inertia has a certain time delay conditional when working, so that the rotary movement of the release lever is not so quick and sudden can be done as if using a spring. In addition, in this known embodiment of the bimetal strip against the action of a Return spring work, which leads to a further delay in the operation and thus in the Switching speed leads.

The present invention has set itself the task of this adhering to the known devices To avoid disadvantages and to create a release device with the greatest possible Working accuracy can be operated and the lowest possible force and triggering it so that a small overcurrent is required.

This is the case with a trip release device described above for switches

Applicant:

Georges Allard, Bois-Colombes, Seine

(France)

Representative:

Dipl.-Ing. H. Seiler and Dipl.-Ing. H. Stehmann,

Patent attorneys, Berlin 19, Oldenburgallee 10

Named as inventor:

Georges Allard, Bois-Colombes, Seine

(France)

Claimed priority:

France of July 20, 1960 (833 659)

release device achieved according to the invention by at least one movable stop which is in the on position the contact lever or locks so that the contacts carried by him or them against the fixed contacts are held, the striker being provided when triggered to push back the stop from the position in which it blocks the contact lever or levers.

The impact member here expediently consists of a lever, one end of which is elastic against a stop member is held, which in turn by a bimetallic strip or an externally operable Button is controlled. The end of the lever acts with the contact lever or levers in the Together that their activation causes the lever to be cocked again.

The stop can pivot about a fixed point and the action of a return spring be exposed, which tends to return him to the position in which he or the contact lever locks.

A release device with a stop formed by a slat, a rod or the like Contact levers that can be pivoted around one of their points and one with another of their points Form support or a latch for the contact lever is a further embodiment of the invention characterized in that the impact member acts on a point of the stop so that it this by its stroke movement in the sense

509 687/327

3 4

pivots, which the stepping back of the support Fig. 5 shows schematically a triggering device

or the latching causes. The striker for a switch with a pivotable and

forming lever acts on an edge or a free sliding contact lever;

End of the pivotable stop by means of a F i g. 6 is a schematic view of the same

Hook or the like, which on one of its arms 5 device in the off position;

is attached. F i g. 7 is a top plan view of a tripod with a trigger

Another characterizing feature consists of the device according to the claims provided

in that one arm of the two-pole switch forming the striker;

pivotable lever when triggering or the F i g. 8 is a section along the line VIII-VIII

The switch is switched on again by the contact of FIG. 7;

lever or the contact lever of the switch so ver Fig. 9 is a section along the line IX-IX of the

is pivoted that an arm of the lever of Fig. 7;

newly latched to the stop member, F i g. 10 shows a detail in section X-X of FIG

The lever forming the striking member carries a F i g. 7;

Bimetallic strip, with which he is in the rest 15 Fig. 11 shows a detail in section along the

position on the stop member holding it from line XI-XI of FIG. 7;

supports. The stop member can in turn by F i g. 12 is a perspective view of a one Bimetal strips are formed, the particularity of the FIG. 7, which the contact lever, his Training is made so that the two bimetal stops and the trigger device used shows strip through fluctuations in the ambient temperature. The switch shown in FIGS. 1 and 2 carries Temperature are deformed parallel and in the same direction, the one base 1 with a fixed contact 2 and one kind that the adjustment required for the triggering at 4 pivotable contact lever 3, which is attached to a ment of the stop member remains practically constant. End of the moving contact carries. In the

The trigger value of the switching position of the striking member puts the contact lever with his

The bimetallic strip forming the lever is supported by the other end against a stop 6, which is at 7

adjustable on the outside with a screw. is pivotable and in the in F i g. 1 shown

In the case of a multi-pole switch, it is advisable to hold positions by a spring 8. The one or more one or more poles pulling a stop for the contact lever 3 is provided arranged striking members, each of which interacts with the end of the stop 7 opposite a separate stop member, the 30 nose 9, which is a bimetallic strip from a pivotable angle at 11 , an electromagnetic member lever 10 is worn. This lever lies with or. The like. Contains. the end of one of its arms 12 against the edge

The poles of the multi-pole switch will be of bar 13 of a bimetal strip 14 while carried separate arms, which is connected to a different arm 15 with a tension spring 16, common movable holder are attached, the 35 which normally the end of the arm 12 to the the switched-on position with a stop to the edge strip 13 holds.

cooperates, with each of the different impact At 17 is schematically an actuating button for members separated the withdrawal of this stop turning on the switch and at 18 a spring for it the simultaneous interruption of all contacts, which when triggered the contact lever of the switch can cause. 40 tilts in the direction of the arrow / to position 3 '. the

One or more shunts are parallel to the tripping can be done by the bimetal strip 14

the circuit containing the bimetallic strip, which is controlled by the action

section arranged, which optionally deformed an overcurrent in the direction of the arrow g

are. and thereby releases the lever 12, which in the sense of

The triggering device according to claims 45 arrow h pivots and strikes with its hook 9 against which enables the use of a striking member of stop 6 and pushes it back,
high impact force that immediately hits the stop. The contact lever 3 then tilts to 3 '. After the actuated and its retrieval the separation of the triggering of the switch entails the various contacts. The release of this part as shown in FIG. 2 position shown. In the case of Be-striking member, very low overcurrents can be achieved with the utmost accuracy when the button 17 is actuated in the opposite sense. Closing the contact lever is brought from 3 'to 3 and the lent enables the activation of the in-use contact to be restored. In doing so, the striking link formed in Beter manner is restored to the readiness for release of the release device, several poles in the case of multi-pole switches by pivoting the lever 10 in the direction from which the arrow g is controlled and in spite of the large mass and 55, so that the End inertia of the parts to be used with high of the arm 12 again in the edge bar 13 of the switching speed. Bimetal strip 14 engages. For this purpose, the marginal

The subject of the claims is hereinafter led to 13 a bent part 13 'on which

with reference to the drawing, by way of example, the end of the arm 12 slides before it enters its

explained. 60 Fig. 1 assumes the position shown again. Of the

F i g. 1 shows schematically a triggering device Bimetal strips 14 can of course also from the outside

for a switch with a pivotable contact lever; can be operated by an operating button.

Fig. 2 shows schematically the same device instead of the striking member through immediate leg the switch-off position; actuation by the contact lever 3 is operational again

F i g. 3 shows schematically a triggering device 65 ready, one can also use the

for a switch with a sliding contact lever; Provide contact lever rigidly connected part, which

Fig. 4 is a schematic view of the same device rather than the striking member in a corresponding manner in the off position; makes.

5 6

When executing the F i g. 3 and 4, the other approach 32 has a detent 38, which locks the contact lever 3 of the switch B a sliding movement pushbutton 21 in the on position, and has for this purpose, for. B. two axes 19 and 19 'if they have a projection 39 one at 41, which slide in slideways 20 and 20'. It is pivotable and down with a tension spring 42 supports two movable contacts 5, 5 ', which cooperates with two S-linked levers 40, which cooperate from the fixed contacts 2 and 2'. It is usually the mainspring in the form shown in FIG. 8 illustrated actuated by a push button 21, the shaft of which is held th position.

is guided in a slide 22. The contact lever The contact lever 3 is supported in the switched-on position by a retaining lug 23 position on a plate formed by a plate, which is hit by a flexible pin 24, the lower pivot edge 43 of which will bear a similar Task such as the one-above stop 6 provided in the base of the housing is fulfilled. This pin has a section 44 located. On this stop, two angled tab 25, which act opposite the end of the hammer 10 a and 10 b , which pivot about their axes 11 α and 11 b independently of each other of the arm 12 of the lever 10 of the release device. The bimetallic strip 14 is actuated here with its 15 bar and its striking movements are controlled by two edge strips 13 the other arm 15 of the lever 10 different bimetallic strips 14 a and 14 b via a nose 26 carried by this arm, which are in the circuits of each contact

In Fig. 4 the position that is switched on is indicated by dash-dotted lines.

different parts during tripping and full- The circuit runs z. B. for the movable

pulled out their position in the off position 20 contact 3 b via the input terminal 45, the conductive

shown. It can be seen that the contact lever at plate 46, the fixed contact block 2 b, the moving

its transition from 3 'to 3 "the lever 10 in borrowed contact block 3 b, the arm 296, the conductive

its original position returns, whereby the strand 47 to connect the arm 29 b with the

Nose 26 again with the edge strip 13 of the bimetallic strip 14 b, the conductive plate 48 and the

metal strip 14 is brought into engagement, so that 25 output terminal 49.

the release device is ready for operation again. The switch is switched on by

When executing the F i g. 5 and 6 is pressed on the push button 21. This is the assume that the axis 4 of the contact lever 3 of the plate 28 around the upper edge of the stop 6 switch C can slide in a slide 27, and pivots on which it is supported. At the end of at 3 'and 3 "(Fig. 5) are dot-dashed the up- 30 downward movement of the push button is the approach successive positions of the contact lever 32 detected by the lever 40, and the contact lever shown during triggering. The principle is recorded. In the event of an overcurrent, e.g. B. in that Borrowed mode of operation of the release device is the circuit of contacts 2 a to 5 a, the big corpse occurs As in the previous examples, they return metal strips 14 a and give the shock proof but here with a switch with trip-free 35 movement of the lever 10 a free, which combines the stop 6, measured the same working principle as in the previous

The pivot lever 10 can be pushed back by a sliding foregoing example. As a result of

Part to be replaced, which under the action of arrangement of a striking link for the circuit

one or more springs a corresponding one of each pole triggers the switch immediately if

Can perform percussive movement, the 40 an overcurrent occurs in one of these circuits.

Springs normally press against a stop, an externally actuated release button 57 can

its withdrawal in the same way by a withdrawal of the attack, if he

Bimetal strip or an externally actuated one is pressed in.

Finger or the like. Can be controlled. When the switch on the ambient temperature

In FIGS. 7 to 11 a two-pole switch element provided with a tripping device 45 is to be independent, the nose 9 of the striking of the above type can be represented by a bimetallic strip 50 (FIG. 11). The previous examples are dispensed with, the deformations of which are marked only by the speaking parts with the same reference changes in the ambient temperature. The contact lever 3 can be called a. This z. B. perform pivoting and sliding movement on the hammer 10 b. It comprises 50 mounted bimetallic strip 50 is on the edge of an insulating plate 28, on which two two loading ledge 13 of the Bimetallstreif ens 14 & engaged and α wegliche contacts 3 and 3 b-supporting arms 29 α its height, by means of an adjusting screw 51 one and 29 b are attached, and tear-off contacts 3 ' α are made. This screw enables the very and 3'b, that of the arms 29 α and 29 b, to set the tripping current intensity precisely. The fixed slats 30 a and 30 & are supported. 55 metal strips 146 and 50 can under the on-The plate 28 is actuated from the outside by a switch-on effect of the fluctuations of the ambient temperature button 21, which has two lugs 31 and 32, ratur parallel and co-directional deformations that are created by two recesses 33 and 34 in which the effects of this temperature swivel plate 28 occur, in which they can slide. On kungen canceled and the triggering bedem full part between the openings of the plate 60 acting deformation of the bimetallic strip 14 b, is supported during the switch-on movement, ie the tripping current, exactly constant knife-shaped projection 35, which is held between the.

both approaches 31 and 32 of the push button as in the section in F i g. 10, two can be formed and the pivot axis of the contact lever shunts 52 and 53 between the fixed configures. Coaxially to the approach 31 is a pressure 65 clock 2 b and the bimetallic strip 146 is provided spring 36, which are located with one end on the. These are supported from one another by an insulating plate 28 and the other end of which is located in a 54 insulated shunt at one end with a recess 37 of the housing 1 of the switch. Sockets 57 a and 58 connected normally

are pressed against the base of the housing by coaxial springs 59 which are between a insulating part 60 of the housing and provided on the foot of the sockets collars 61 arranged are.

Screws 55 and 56 coaxial with these sockets can slide in holes in the plate 48, while the sockets are slidable in bores 62 in the plate 60. The screws are normally held away from the sockets 57 a and 58 by coaxial springs 63. By means of these screws, contact between the shunts and the plate 48 can be established. For this purpose, the screws 55 and 56 can be screwed into threaded bores of the corresponding bushing from the outside so that they bring them into the position shown for the bushing 58. The corresponding shunt 53 is then connected in parallel to the circuit section containing the bimetal strip 146. As a result, the bimetal strip lies in a circuit section through which a current flows, which depends on the resistance of the shunts 52 and 53. One can therefore set a switch for several current levels by means of the shunts 52 and 53 and the screws 55 and 56, the transition from one current level to another taking place by simply screwing in or unscrewing the screws 55 and 56 .

Furthermore, by bridging or adjusting the bimetal strips of each Striker triggering the switch for different currents in the separate circuits the different poles of the switch are brought about.

Claims (13)

Patent claims: 1. Trip device for switches with one or more movable contacts provided and contact levers cooperating with fixed contacts, which have a vibrating Contains impact member that is locked in the on position of the switch and for adjustment the or the contact mist is provided when switching off, characterized by at least one movable stop (6) which, in the on position, the contact lever or levers (3) blocks so that the contacts (5) carried by him or them against the fixed contacts (2) are held, wherein the striking member (10) is provided to hit the stop when triggered (6) to push back from the position in which it locks the contact lever or levers. 2. Triggering device according to claim 1, characterized in that the striking member from a lever (10), of which one end (12) resiliently against a stop member (13) is held, which in turn by a bimetallic strip (14) or an externally operable Button is controlled. 3. Tripping device according to claim 2, characterized in that the lever (10) with its end (15) cooperates with the contact lever or levers in such a way that you Switching on causes the lever to be tensioned again. 4. Trip device according to claim 1, characterized in that the stop (6) around a fixed point (7) pivotably arranged and exposed to the action of a return spring (8) is, which endeavors to return him to the position in which he or the contact lever locks. 5. tripping device according to one of claims 1 to 4 with one by a lamella, a rod or the like. Formed stop of the contact lever, which can be pivoted about one of its points are and with another of their points a support or a latch for the Form contact lever, characterized in that the striking member is at a point of the stop acts in such a way that it pivots this through its flapping movement in the sense that causes the support or the latch to step back. 6. tripping device according to claim 5, characterized in that the striking member forming lever on an edge or a free end of the pivotable stop (6) by means of a hook (9) od. The like. Acts which is attached to one (15) of its arms. 7. tripping device according to claim 6, characterized in that an arm (15) of the Pivoting lever (10) forming the striking member when it is triggered or switched on again of the switch is pivoted by the contact lever or the contact lever (3) of the switch is that an arm (12) of the lever latches again on the stop member (13). 8. Tripping device according to one of claims 4 to 7, characterized in that the lever forming the striking member carries a bimetallic strip (50) with which it is in the rest position is supported on the stop member (13) holding it. 9. Trip device according to claim 8, characterized in that the stop member (13) is formed by a bimetal strip, the training being made so that the two bimetal strips parallel and in the same direction due to fluctuations in the ambient temperature are deformed in such a way that the adjustment of the stop member required for triggering remains practically constant. 10. Triggering device according to claim 8, characterized in that the trigger value of the from the outside through the bimetallic strip (50) carried by the lever forming the striking member a screw (51) is adjustable. 11. Tripping device according to one of claims 1 to 10, characterized in that in the case of a multi-pole switch, one or more striking links assigned to one or more poles are provided, each of which cooperates with a separate stop member that a bimetal strip, an electromagnetic member or the like. Contains. 12. Tripping device according to claim 11, characterized in that the poles of the switch supported by separate arms attached to a common movable holder are, which cooperates in the switched-on position with a stop, each of the different beat links separate the withdraw this stop for the simultaneous interruption of all contacts of the switch can (Figs. 8 to 11). 13. Tripping device according to one of claims 1 to 12, characterized in that one or more shunts (52, 53) parallel to the one containing the bimetal strip 10 Circuit section are arranged, which can be optionally switched on. Documents considered: German Patent No. 875 225; German explanatory documents No. 1040 668, 916. 1 sheet of drawings 509 687/327 9.65 © Bundesdruckerei Berlin