FR2538159A1 - TRIGGER DEVICE FOR AUTOMATIC OR CONTROLLED SWITCHING APPARATUS - Google Patents

Abstract

1. A tripping device for a switch apparatus having a local control member (2) and the opening of which is automatic when faults appear, comprising : - on the one hand, a first quick trip mechanism which holds in a first stable closure position (F) a transmission member (3) associated with the control member (2) and subjected to a resilient return force which urges it successively to a second stable tripped position (D) and to a third stable opening position (O) and which closes a control switch (50) of the apparatus solely for the closure position of this transmission member (3), - on the other hand, a second quick trip mechanism which is adapted, on the one hand, to trip the first mechanism for releasing the transmission member (3) and adapted, on the other hand, for cooperating with this latter in order to give it these stable tripped (D) and opening (O) positions, - this transmission member (3) being capable of communicating, for a fourth unstable resetting (R) position, resetting movements which are applied to the second mechanism and which are transmitted to resettable detector devices reacting sharply on the appearance of current overloads of different levels in a power circuit of the apparatus, which is closed and opened by an electromagnet (51) whose coil is in series with the control switch device in which the second quick trip mechanism comprises : - a trip lever (20) causing the first quick trip mechanism to be released which is held resiliently set by cooperation with a pawl (29) subjected to the action of sliders (43, 47) associated respectively with the detector devices (55, 56, 57) and which cooperates with a first surface (6) of the transmission member (3) to stop this latter in the tripper position (D) when cooperation of the pawl with the trip lever is interrupted by the action of at least one slide (43, 47), - a resetting lever (35) which is brought by the trip lever and in a given direction (M) adjacent a second surface (9) of the transmission member, when this latter reaches this tripped position (D) and which cooperates resiliently (27, 4) with this second surface for stopping this transmission member in the opening position (O), this second surface (9) of this transmission member being capable of communicating to this resetting lever and in the unstable resetting position (R) a movement in the reverse direction (N) which is transmitted on the one hand (25, 49) to the trip lever for re-establishing cooperation thereof with the pawl and, on the other hand (45, 46 respectively 41, 42) to the slides (47, 43) towards the resettable detector devices (55, 56, 57).

Description

TRIGGER DEVICE FOR A SWITCH DEVICE

AUTOMATIC OR ORDERED CUT

  The invention relates to a triggering device for an automatic or controlled switch-off device comprising on the one hand a first mechanism with sudden triggering

  which maintains in a stable first position

  ture, a transmission member subjected to an elastic return force which urges it to a second stable release position and respectively to a third stable position of successive opening, and which closes a control switch of the apparatus only for said position closing, and

  on the other hand, a second mechanism with

  that is able on the one hand to trigger the first

  to release the transmission device and to cooperate with the latter to provide it with these second and third positions and which is also capable of transmitting

  resetting actions to resettable devices, react

  when power surges from different

  Natural annuities appear in a power circuit of the device. 2- Such a mechanism is in particular applicable to a contactor device comprising a local control member and having automatic opening means that respond to the appearance in the circuit of the load of instantaneous overloads of current, such as those due to short-circuits -francs or impedant, or prolonged such as

those due to surcharges.

  An apparatus having the general constitution defined above is known from the French patent application

  No 8119919 filed on 9 November 1981 in the name of the

  In this known device, which makes use of moving parts in translation, one and the same organ of the second

  snap mechanism is used to unlock

  rust the first mechanism, to cooperate with the organ

  of transmission, and to effect the rearming of the

  resettable after the appearance of a defect.

  The invention proposes first of all to provide an apparatus

  killing the same functions as that of the prior art in which the trigger functions and the reset functions will be performed using separate parts allowing effective decoupling between the mechanical reset operations specific to the second mechanism and the rearming of the or resettable devices, and between

  operations which condition the rearmament and the

  the first trigger mechanism; in a mode

  particular embodiment, the invention is

  construction of an apparatus where friction will be reduced by

  in order to improve the sensitivity and speed of

  internally while reducing sensitivity to disturbances

  bations of external origin; finally, in the context of a particular combination of the apparatus, with a remote rearming device, the invention is concerned with the measurements that can be made by a motor rotating in a single direction, operations which are

  performed in both directions during a manual reset.

  According to the invention, the aim is achieved by virtue of the fact that the second snap action mechanism comprises a release lever, causing the release of the first snap action mechanism, which is held elastically reinforced by cooperation with a ratchet subjected to

  the action of two drawers associated respectively with the

  detectors, and which cooperates with a first surface of the transmission member to stop it in the triggered position "D" when the cooperation of the pawl with the release lever is interrupted by the action of at least one drawer , a reset lever which is brought by the release lever and in a given direction in the vicinity of a second surface of the transmission member, when the latter reaches this position and which cooperates elastically

  with this second surface to stop this organ of trans-

  mission in the open position, this second surface

  of that transmitting organ capable of communicating

  to this resetting lever in the unstable position of rearming a reverse movement which is transmitted on the one hand to the trigger lever to restore cooperation with the ratchet, and on the other hand to the drawers

  to the resettable sensor devices.

  Other features of the device as well as embodiments will be better understood on reading

  from the description below which is accompanied by five

figures among which

  FIG. 1 schematically represents a first dis-

positive according to the invention.

  FIG. 2 diagrammatically illustrates a second embodiment derived from that of FIG. 1 in position

closure.

-4-

  Figures 3 a, 3 b, 3 c show respectively a dis-

  positive according to Figure 2 in the successive positions

  trigger, open and reset.

  Figures 4a and 4b show an example of practical realization in which the transmission member is constituted by a rotating part, and o two positions, one triggered, the other closing in

  rearming courses are respectively

  FOA; the release lever and its ratchet have

  been here omitted for clarity.

  FIG. 5 diagrammatically represents a device according to FIG. 2 which is associated with a remotely controlled removable subassembly and able to reset the apparatus comprising the device, and FIG. 6 shows in perspective a view of the rotating part used in FIG. the device according to the

figure 4.

  Elements of a housing containing the mechanism are represented

1 in Figure 1.

  A manual control member 2 makes it possible to maneuver one.

  movable transmission member 3 which is associated with a tension spring 4 tending to move it in the direction L.

  This moving part has a first-edge 5 placed parallel to

  in parallel with L, a first bearing surface or inclined ramp 6 placed at a first level 7, a second edge or abutment surface 8 which is parallel to L, and a second inclined ramp

  or second support surface 9 placed at a level 40.

  This moving part that can take one of four posi-.

  F, D, O, R was shown in solid lines in the F position and only the bearing surfaces 6 and 9 were shown in dotted lines at other positions D

and O respectively D, O and -R.

  A locking lever 10 oscillating about a first fixed pivot 11 secured to the housing is held in a rest position, where it rests on a stop 12, under

  the action of a torque Cl of direction P supplied by a spring 13.

  This lever carries a movable pivot 14 around which oscillates a

  retractable latch 15 whose rest position is deter-

  undermined by its support, on a stop 16 of the lever, which is provided by the spring 17 This latch has an end 18 which cooperates with the surface 6 to keep the movable part 3 in the position F o the spring 4 is armed one end of the locking lever 10 next to the lock

carries an extension or spout 19.

  A rocking triggering lever 20 oscillating about a fixed pivot 21 comprises a hammer 22 placed opposite the

  extension 19, a stud 23, a stud 24 and a stud 25.

  A tooth 26 is disposed at one end of the part 20 which is also stressed by a torque C 4 provided by a spring 27 and tending to move it in the direction M. This trigger lever 20 finds an armed rest position for which the spring 27 is stretched when the tooth 26 is supported on a spout 28 belonging to a trigger pawl 29 which can oscillate around a fixed pivot 30 of the housing and which carries two arms 31 and 32; this trigger pawl has a rest position communicated to it by a spring 34 and which is defined by a

stop 33 of the housing.

  A reset lever 35 oscillating freely about a pivot 21 '(which may be of the same axis as that of the pivot 21 or a neighboring parallel axis pivot) has a first arm

  36, a second arm 37 and a third arm 38, one of which

  end face 39 is located at level 40,

  dotted, o moves the support surface 9.

  One end 41 of the arm 36 is placed with a certain clearance opposite a rim 42 belonging to a first slide 43, which moves in the housing for example in a rectilinear manner, in the direction E or G and which wear a finger

  44 placed opposite the arm 31 of the pawl 29 -

  One end 45 of the arm 37 is also placed with clearance in the vicinity of an end surface 46 belonging to a second slide 47 which moves in the housing for example in a straight line along the direction H or J and which

  carries a finger 48 placed opposite the arm 32 of the pawl 29.

  Finally, a surface 49 of the reset lever 35 remote from the pivot 21 'is placed facing the stud 25 so that an angular cooperation can be established between the reset and release levers in one of the directions M or N. Parts and members 13, 10, 3, 4 belong to a first snap action mechanism, and parts 20,

  27, 29, 34, 35 belong to a second trigger mechanism

abruptly.

  As the device that has just been described aims

  to commission or shut down a device that

  In the case of a fault, the opening opening is automatically manual via a local control device, a control switch 50 is placed in series with a coil 51 of a contactor electromagnet placed in the housing and shown schematically at 54, and comprises for example a fixed contact 52 carried by the housing and a movable contact 53, which is associated with it; in the example shown the movable contact is carried by the locking lever 10 and the switch 50 is closed when, the movable part 3 is in the position F, the locking lever is in the rest position against the stop 12; the slides (43) or (47) will be moved abruptly in the direction E or H, by means of resettable overload detectors or devices placed in the housing and represented diagrammatically by 55, 55 ', 56, 56' and 57, 57 'to respond to the occurrence of overcurrents of

  different levels in charge circuits 58 of the contact

  54; the marks 55 ', 56', 57 "may respectively represent magnetic strikers and vanes and bimetallic strips The operation of the device which has just been described is

the following.

  When the trigger pawl 29 is moved in the direction S, due to sudden displacements effected in the direction E, or in the direction H, by one of the sliders 43 or 47, the tooth 26 of the release lever 20 is released. and this one pivots in the direction M; during this sudden movement resulting from the expansion of the spring 27, the pin 24 abuts on an abutment surface for example on the abutment surface 8 ', to give the piece 20 a working position o the stud 23 is located at level 7 and opposite the support surface 6; this same movement due to the torque C 4 brings the percussion of the spout 19 by the hammer 22 and consequently the sudden tilting of direction Q, the locking lever 10, the latter resulting in turn a rupture of the mechanical contact between the surface of support 6 and

the end 18 of the lock 15.

  The moving part 3 which is thus released in its turn then moves in the direction L until the support surface 6 comes into contact with the pin 23 The moving part 3 then occupies a stable position D called trigger o the switch 50 is open; this opening is due to the fact that the end 18 of the lock 15, 5 e is applied

  against the edge 5 when the rocking lever 10 has suddenly taken

  It is in this position that the pin 25 is applied against the surface 49 of the cocking lever 35 and has moved it in such a way that the end surface 39 is placed at

  vicinity of the bearing surface 9 of the transmission member

mission 3.

  A maneuver exerted on the workpiece 3 in direction K in order to put the apparatus into service, that is to say in position F, can not be followed by effect, since the trigger lever 20, having escaped at the pawl 29, occupies a position which prevents the locking lever 10 from returning to its rest position, closing the switch 50, and placing

  the end 18 of the latch 15 against the bearing surface 6.

  On the other hand, the device can be voluntarily

  permanent opening "O" thanks to an external action

  upper member exerted on the member 2 in the direction "L", which causes first a slight tilting of the release lever 20 in the direction 'IN "through the action of the bearing surface 6 against the stud 23; this tilting, which allows the pin 23 to escape the abutment surface 6, and to come to bear on the surface 5-brings the bearing surface 9 to cooperate with the surface 39 of the arm 38 of the reset lever 35 to provide a position "O", stable, opening that results from the balance of antagonistic forces exerted by the springs 27 and 4 and transmitted by the pieces 27, 20, 25, 49, 35, 38,

  39 on the one hand and by the coins 4, 3, 9 on the other hand.

  The resetting of the device triggering devices after an automatic triggering must have the effect, on the one hand, of replacing the transmission member in position F and, on the other hand, of restoring the devices 55, 56, 57, 43 and 47 in a state corresponding to the absence of fault Ce

  resetting, which will provide "G" direction movements

  "J", to the sliders 43, 47, and will be transmitted by means schematized at 59, 60, 61, will result from the cooperation between the bearing surface 9 (or a ridge 62 separating this surface from the bearing surface 8) against

  end 39, of the cocking lever-35.

  This rearming is done during a displacement of the

  transmission gear 3 controlled by an external action on the member 2 and in the direction 'L', from the position "D" or "O" to the position "RX; the surface 9 repels _ 9 _

  lever arm 38, and on the one hand causes a pivot

  part 35 in the direction "N" and that of the lever 20 until the point where the pawl 29 can slide behind the tooth 26, and secondly a drive direction G and J of the slides 43, 47 by the ends 41 respectively 45 of the arms 36 respectively 37 The position "R"

  thus obtained is not stable because of the elastic action

  antagonistic tick transmitted from the spring 27 to the transmission member 3 by the levers 20 and 35, so that when the external action ceases, this member 3 tends to

return to the "O" position.

  In one embodiment shown in FIG.

  parts with the same functions as in the previous example.

  tooth have the same references, the two pivots 21, 21 'above have axes coinciding at 21, and the bearing surfaces 6' and 9 'are portions of neighboring surfaces

  belonging to the same surface The apparatus is here represented

  felt in the closed position "F".

  A trip lever 20 ', whose surface 24' here cooperates with a stop 8 'of the housing 1 to facilitate

  reading the drawing, could also find a posi-

  working pressure against an abutment surface 8 "

  similar to the abutment surface 8 of Figure 1.

  In the working position of the trip lever 20 ', the rim 231 of this lever is met by the surface

  6 'or an edge 62' which separates it from the sup-

  face 5, to give the transmission member 3, and therefore the local control member 2 connected thereto, a

  stable position triggered "D", see figure 3 a.

  The pivoting locking lever 10 (see FIG. 2) carries a contact lever 63 which is applied against a stop 64 of this lever by a spring 65 to have a rest position. This contact lever has an end 66 which can lift a movable contact 53 'to separate it from a fixed contact 52' belonging to a control switch

  having the same function as the preceding switch 50.

  The opening of this switch results here either from

  the lever 10 in the direction Q after release by the release lever, either when the lever 10 is tilted or not, the end 66 is pushed into the

  direction "K" thanks to a T action defined later.

  The abrupt character of the opening of the switch 50 'results either from the instantaneous switching which is communicated to the

  lever 10 by the trigger lever, that is to say

  instantaneous ration of the latch 15, 18 and the bearing surface 6 'when the transmission member 3' is displaced by

  the local controller 2 to the "o" position.

  In the first case an antagonistic torque 4 of direction M is communicated to the lever 10 by the spring 27 against a couple

  Cl of direction P communicated by the spring 13.

  In the second case, an external force communicated to the members 2 and 3 'is added to the force of the return spring 4 to first swing the eclipsable lock 15 into the

  meaning "Q" against a couple C 2 given to it by the res-

  spell 17; when a torque C 3 greater than the torque Cl is transmitted to the lever 10, it occurs due to the fact that the retractable lock has taken a position inclined relative to the surface 6 ', a very fast tilting of the lever 10 in the direction Q, which allows the latch 18 to slide along the edge 62 'and to be placed against the surface of

  stop 5 to keep the switch 50 'open.

  As in the case of FIG. 1, the positions D, O implement an antagonistic cooperation between the surfaces 6 ', 23' and respectively 9 ', 39' to give two stable positions to the transmission member and to the control organ

  local area, see figures 3a and 3b where the arrows opposite indicate

such cooperation.

  il - The unstable position "R" is again obtained by a return force towards the position "O" which is communicated to the transmission member 31 by the spring 27 whose action is transmitted by the release lever 201, an arm 25 'of the latter, the surface 49, the lever 359 and the end 39', the latter acting on the surface 93, see FIG. 3c, where the opposite arrows indicate antagonistic actions.

  In the two illustrated embodiments the movers

  ments of the transmission device were assumed to be

  lines; the devices are able to operate in the same way when these parts 3, 3 'are rotating parts, for example integral with a rotary knob 2 movable about an axis YY' perpendicular to tangential displacements K and L

  In an embodiment shown in an unlocked position

  "D" in Figure 4a, and o the same marks indicate the same functions -the piece 3 "rotating, which has the same functions as the previous piece 3 ', is movable around a pivot 68 whose axis is parallel to the axes of

  parallel pivots 11, 67, 14, 21 and 30.

  The contact lever 63 comprises, in addition to a first

  mité 66 'whose function will be specified later, a second insulating end 69 which cooperates with the contact

  mobile 53 'as previously done the end 66.

  For constructive reasons, the rearming lever 35 'shown in dashed lines has instead of the arms 41, 45 pins 411, 45' having, for performing rearming, the same functions as the arms 41 and 45 and this in cooperation with the The surfaces 6 'and 9' visible in FIG. 6 are aligned but offset axially along the rotating transmission part 3 "which furthermore comprises a cylindrical surface 8 U 12 - which serves as a stop on the surface. 24 A clearance 87 of the part 3 "(see Figure 4), allows the arm 38 not to enter

  in contact with this piece 3 "in another place than 9 '.

  The trip lever 20 "1 has an arm 25 'which cooperates with a pin 49' of the reset lever, whose

  function is the same as that of the previous 49 surface.

  The properties and modes of operation of the variants are substantially identical to those of the apparatus according to the

figure 1.

  Trigger mechanisms such as those shown in Figures 2 to 6 are particularly suitable for remote control by receiving external control actions; these are provided for example by a

  electric actuator, using a small synchronous motor

  chrone, designed to close the device; in

  remote operation of rearming and commissioning.

  The decoupling of these mechanisms between

  rearming, tripping and closing

  the control switch, as well as, on the one hand, the

  respective directions of the directions of movement of the

  carry out these functions and that, on the other hand,

  respective positions between the "IF, D, O and R" positions

  try to make a simple remote control of the appa-

  reil having this mechanism to reset it, remotely

after an automatic opening.

  It will indeed be observed that in the mechanisms described in FIGS. 2, 3, 4 and 6, the displacement of direction "KI supplied to the transmission member to bring it to position F, the movement of the arms 36 of the reset levers provided. to operate during a reset, and the movement that must be applied to the end 66 'of the lever of

  contact 63 to hold the switch open, are

and in the same sense.

  It is therefore possible to associate with these mechanisms, (see FIG. 5, where for the clarity of the drawing neither the release lever nor the pawl have been shown), an inner remote control slide 70 having three portions 71, 72 , 73 able to exert thrusts of the same direction (indicated by the arrows S, T, V) for example on a surface portion 74 of the transmission member 3 'which would be placed preferably at a third level 75 in the vicinity of levels 7 and 40, on the 66 'end and on the

arm 36.

  This slider 70 which is associated with a return spring 77 and a stop 76 of the housing to fix its rest position W is represented in the Z position that it occupies at the moment when it has just been engaged in position " F "of

  the transmission member (3 '), by the latch 15, 18.

  A subassembly 78 removably attached to the housing 1,

  and having two feed terminals 79, 80, between

  which are connected a small synchronous unidirectional motor 81 for example and a holding switch 82, has a pusher 83 which is actuated by the motor through a reducer 85 having a large reduction and a cam 90 This pusher 83 penetrates into the housing 1 through an opening 88 thereof to cooperate with the thrust surface 87 of the slider 70 after passing through a

opening 89 of the housing 1.

  The switch 82 which is only open when the pusher 83 is in the rest position W, and closes as soon as the latter moves in the direction K, ensures the continuity of the power supply to the motor when a short stopping voltage disappears. en route applied directly to the engine to

  using a switch 91 between terminal 79 and a third

  terminal 84; this voltage being applied at the moment o

  remote reset must be performed.

  The pusher 83 which is associated with a spring 86 and which

  kill once for each order a single move go

  meaning "K" and meaning return "L" extending between

  tions (W, B, X, B, W) thus communicates with

  bucket 70 WX amplitude displacements.

  14 - The rest position W of the slide corresponding to that of the pusher 70 is such that even for a reset position "R" given to the transmission member 3 'by a manual external action exerted on the control member local 2, the bearing surface 74 can not come into contact with the portion 71; likewise neither the arm 36 nor the arm 66 'can come against the portions 73 or 72 respectively to

  the position "D" of the transmission member.

  The maximum position X reached by the slider and given to the transmission member 3 'is such that the bearing surface 6' is placed slightly to the left of the latch 18 to

  allow it to be put in place under the effect of spring 13.

  In all the positions of the slide 70 located to the left of a position B, the portion 72 meets the end 66- 'of the contact lever and keeps open the switch 50'; if the reset attempt, communicated during the race from W to X to the trip lever 35 ', is

  actually followed by a hooking of the trigger lever

  by the pawl 29 during the return travel from W to B through Z, the lever 10 can take the position shown in Figure 5 and the switch 50 'can close only when the slide returns to the right of the position B However the hooking of the lever of

  20 'trigger by the ratchet 29 can indeed only-

  If no directional displacement H is given to the slider 47 by the snap action mechanism 57 (itself responsive to a bimetallic strip 57 'heated or still hot), this lever 20 "would come back again.

  lever 10 before point B is reached, if this

  Slice 47 could not resume a position directed towards J.

  The results obtained during the telecom operation

  of the device which has just been described are therefore

  to those achieved by a manual rearming and closing action on the local controller. In an embodiment according to FIG. 4b using a transmission member 3 "such as that of FIG. 6, a surface 74 'which has the same function as the surface 74 of FIG. 5, can be aligned with the surfaces 6 'and 9' while being axially offset so as not to interfere

  with surfaces 24 and 39, see Figure 6.

  The implementation of a slider such as 70 in the embodiment according to Figure 4a can be advantageously carried out because the parts or surfaces 66 e, 74 'and 41' which are all located below the axis 68 'move in the same direction K when the reset is performed (see Figure 4b the organs shown in

  found in a state comparable to that of Figure 5).

  During the various rearming processes, the engagement of the ratchet behind the tooth must be able to take place only if

  circumstances or faults that caused a trigger

  in position D have disappeared As the contactor has been opened, and as a result, no current flows in the charging circuit, the only circumstance that may prohibit

  the engagement of the ratchet is that which results from the

  bending of a bimetallic 57 'still heated as a result of prolonged overload; in this situation the action that is

  caused by an overload detector 57 and which is transmitted

  continuous setting during the cooling time of the bimetallic track 61, prevents the slider 47 to maintain a position directed towards J and thus prevents the pawl to take its rest position; consequently, the trip lever 20, 20 g, 20 ", respectively, can not assume its armed position when the transmission member leaves the position R to move towards the successive positions O

  and F Because of this impossibility, the lever of ver-

  rust 10 can therefore take its rest position, so that the switch 50 remains open, even if the piece 3 is brought to position F as a result, a reclosing of the charging circuit 58 can not be performed as long as a

bimetallic is still hot.

  16 - If the fault which caused the opening of the contactor, and thus the setting in position D of the transmission organ, results instantaneously from a short-circuit franc or an impedant short-circuit (which do not give at the bimetallic time to warm up), a reset movement from D to R, makes it possible to set the armed position of the trip lever 20 or 20 'or 20' because no permanent action from the detectors is magnetic 55 or 56

  either thermal 56 is transmitted by the channels 59 or res-

  respectively 60 to the corresponding drawer 43 or 47.

  An attempt to put the apparatus into service, effected by a displacement of the transmission member from R to F, therefore causes the locking lever 10 to tilt when this member reaches the position F because the hammer 22 of the lever 20 has taken a position away

  If the short circuit is still present, the

  setting of the 50 or 50 'control switch which allows

  therefore an excitation of the contactor 54, will cause an excitement

  at least one of the detecting members 55 or 56 and consequently the successive triggers of the levers 20, 20 ', 20' and 10, and the reopening of the switch 50 or 501 so that the charging circuit s' will open again by excitement of the solenoid 510

  This operation is established even if the transmitting

  sion 3 or 3 'is held in position F by external action

manually or not.

-17-

Claims (11)

Patent claims.   1 Trigger device for a device   switch having a local controller and whose opening   ture is automatic when defects appear   on the one hand, a first snap mechanism which maintains, in a first stable position of closure,   ture, a transmission organ associated with the communication organ   and subjected to an elastic force of return which sol-   lawful to a second stable position triggered and to a third stable position of successive opening, and   which closes a control switch of the uni-   for the closing position of this transmission member,   on the other hand, a second mechanism with   that is able on the one hand to trigger the first   to release the transmission device, and able to   to cooperate with the latter to provide him with   steady state triggered and open,   this transmission device being capable of communicating   quer, for a fourth unstable reset position, resetting movements that apply to the second mechanism and which are transmitted to resettable detector devices reacting sharply to the occurrence of current overloads of different levels in a power circuit of the device, which is closed, and opened by a   electromagnet whose coil is in series with the interrup-   control device, characterized in that the second snap action mechanism comprises: a release lever (20), causing the release of the first snap action mechanism, which is held resiliently cocked by cooperation with a ratchet   (29) subjected to the action of slides (43, 47) associated with   detecting devices (55, 56, 57), and 18 -   cooperates with a first surface (6) of the transmitting member   mission (3) to stop the latter in the   "D" when the engagement of the pawl with the trip lever is interrupted by the action of at least one slide, a reset lever (35) which is brought by the release lever and in a determined direction "M" in the neighbourhood   a second surface (9) of the transmission member,   that the latter reaches this position "D" and which cooperates elastically (27, 4) with this second surface for   stop this transmission organ in the open position   "O", this second surface (9) of this transmission member   mission being able to communicate to this reset lever and in the unstable position of rearming "R" a reverse movement "NI" which is transmitted on the one hand   (25, 49) to the trip lever to restore cooperation   with the ratchet, and on the other hand (45, 46 respec-   41, 42) to the drawers (47, 43) to the devices   resettable sensors (55, 56, 57).   2 Trigger device according to the claim   1, characterized in that the first snap mechanism comprises a pivoting lever <10) which is held in the rest position by a first pair (C1) developed by a first spring (13) and which carries a retractable pivotable latch ( 15) applied against this pivoting lever by a second spring (17), developing a second pair (C 2), this latch (15, 18) cooperating for this rest position with a holding surface (6) of the transmission (3)   in order to keep the latter in position F, or to release   instantaneously under the effect of the occurrence of an internal instantaneous action communicated by the release lever (20) of the second mechanism, and during which only the first spring (13) is biased by the torque (C 3) antagonist at (Cl), or an external action (L) exerted on the transmission member (3) and transmitted to the 19 - lock, during which the second spring (17 ') is first requested by an antagonistic pair - at {C 2) which eclipses this lock and which is transmitted back to the pivoting lever   (10) in the same direction Q as (C 3).   3 Trigger device according to the claim   1, characterized in that the release lever (20) and the reset lever (35) are pivoted about a same pivot axis (21) so that a torque (C 4) developed by a spring arming (27) of the trip lever (20)   transmitted to the reset lever (35) and that the posi-   stable "10" opening of the transmission   obtained when the torque (C 4) is opposed to an internal force   poured communicated by this second abutment surface (9) under the effect of a return spring (4) of the transmission member.   4 Trigger device according to the claim   3, characterized in that the first and second surfades (6 'or 9') are two adjacent portions of the same surface, perpendicular to the direction of movement K, L of the transmission member which are placed on this body of transmission (3 ') respectively (3 ") at two levels different (7, 40).   Trigger arrangement according to one of Claims 2 to 4, characterized in that the pivoting lever (10) of the first snap action mechanism carries a pivoting contact lever (63) which is pressed against it by a spring (65). ) and which has an end (66) able to open   the control switch (50 ') is when this pivot lever   Voting is released, or when this end is removed from the pivoting lever against the action of this spring (65) by a T external action (78) for performing the reset. -   6 Trigger device according to the claim tion 5,   characterized in that the transmission member (3 ') respects   (3 ") has a third surface (74) respectively   (74 ') adapted to cooperate with an internal movable part (70) able to be moved by an actuator (78) which is placed outside the switch device (1) and   who can communicate to that organ of   from 'D' position to 'X' position farther than 'F' position where lock (15) can hold the first surface (6 ').   7 Trigger device according to the claim   6, characterized in that said movable part (70) furthermore cooperates with an arm (36) of the reset lever (35 ') and with one end (66) (66') of the contact lever (63) during of displacement D to X of the transmission member (3 ') (3 ") so as to place the release lever (20) and the detector devices (55, 56, 57) in a   rearm position and respectively to open the   control switch (50 '), a displacement (XZB) of meaning   inverse of this piece (70) being communicated by the -action-   neur such that the switch (50 ') is still open when the latch (15) is adapted to cooperate with the first surface (6') in position F.   8 Trigger device according to the claim   7, characterized in that the movable part (70) is a slider which moves substantially rectilinearly to push the end (66) of the contact lever, the third surface (74) (74 ') and the arm ( 36) of the reset lever in the same direction (K).   9 Trigger device according to one of the   dications 1 to 8, characterized in that the transmission member is formed by a rotating part (3 '' ') which carries the local control member 21 (2) and has first, second and third surfaces (6' , 9 ', 74') at different levels superimposed   along the axis of rotation YY 'of this rotating part.   Trigger device according to claim 9, characterized in that the axis of rotation YY 'of a pivot (68)   of the rotating part (3 '' ') is parallel to the pivot axes   (11, 21, 21 ') locking levers, triggering   and arming (10 respectively 20 "respectively).   11 Trigger device according to the claim   10, characterized in that the trigger lever (20 ")   cooperates, when triggered, with a cylindrical surface   drique (8 '' ') of the rotating part (3' '') to take, under the effect of a return spring (27), a position for which a surface (23 ') of this trigger lever   serves to support the first surface (6 ') of the rotating part   nante (3 '' ') and gives the latter the angular position D   corresponding to the triggered state of the device.   12 Trigger device according to the claim 9 or 10,   characterized in that the first, second, third,   faces (6 ', 9', 74 '), the end (66') of the lever of the contact (63), and the arm (36) of the reset lever (35 ') are placed on the same side with respect to to the YY axis of the part rotating (3 '' ').