FR2475289A1 - Isolating switch with forced apart electrodes - uses double wound helical spring and electromagnet to operate moving electrode - Google Patents

Abstract

The isolating switch overcomes the comparatively large air gap and associated problems of electro-magnet methods of overcoming welding together of the breaker electrodes. Electrode separation is by a single double wound helical spring which also acts to close the switch when required. In one of several variations of the design a separate push-button is used to initiate closing and opening of the switch. The spring is wound over two shafts of a two stable condition lever combination operated by an extension of the open button, the lever system driving the moving contact carrier. The close button directly drives the core of an electromagnetic coil against a spring arm connected by a flexible lead to the moving electrode.

Description

 The subject of the present invention is an electrical circuit breaker switch, of the type comprising a fixed contact, a movable contact, manual engagement and disengagement control members, means for hooking the movable contact carrier and the control member. manual engagement in position n engaged ", and electro-hermic and / or electromagnetic means for actuating, in the direction of disengagement, the attachment means of the movable contact carrier, and subsequently releasing the control member manual engagement and neutralize it, the movable contact being subjected to the action of spring means tending to keep it applied to the fixed contact, and the engagement control member being subjected to the action of spring means tending to recall it in the "triggered" position.

A known circuit breaker of this type, with tripping caused by bimetallic strip and electromagnetic coil, is described, for example, in French patent N 2 137 387 in the name of the Applicant. In this particular embodiment, the movable contact carrier is a lever articulated around an axis, the bearings of which consist of openings made in the walls of the body of the apparatus, parallel to the axis of movement of the button. latching pushbutton, this structure ensuring the correct application of the movable contact against the fixed contact, with wear compensation. However, for breaking, this device has a simple opening, with arc splitting plates electric,
This frequently results in soldering or bonding of the contacts by fault currents, in particular on closing, due to the reaction time of the tripping mechanism, which means that the opening force of the contacts must be increased, which leads to the installation of very strong springs which, in the case of multi-pole breakers, harden the manual engagement control.

To avoid these difficulties, we were thus led to use an electromagnetic contactor, using the trip coil.

 Certain circuit breakers have magnetic means for extracting the contacts. However, in these circuit breakers, due to the locking stroke of the movable contact port and the pivoting of this movable contact linked to its wear, if one wishes to obtain a good separation of the contacts, while avoiding untimely detachment, it is necessary to provide an impol-aunt stroke of the movable core of the bobiae, that is to say a large air gap, to bring the support of the axis of the movable contact n stop and cause the movable contact to tip over.

 The present invention seeks to overcome all of these drawbacks by providing an improved interrupter-circuit breaker, in which the tripping mechanism, in itself, is designed to cause forced separation of the contacts, mechanism ensuring, moreover, all the usual functions.

To this end, the switch-circuit breaker according to the invention, of the type mentioned in the introduction, comprises a movable contact mounted to pivot on an axis located at one end - of the movable contact carrier itself, pivoting at its other end, on a fixed axis, axis on which is also pivotally mounted a cam having a spout cooperating with a notch of a trigger lever composed of one or two adjacent blades, pivotally mounted on another fixed axis, one branch of which is suitable for being actuated by electro-thermal and / or electro-magnetic means, or by the manual trigger control member, and of which another branch has a heel cooperating with the movable contact, said cam having a notch , with a notch close to its bottom, crossed by a movable axis which also passes through at least one light in the form of an arc of circles formed on the movable contact carrier, and which is guided in the radial direction on a rocker, mounted pivoting on an axis parallel to the pivot axis common in a movable contact carrier and to the cam, and linked to the manual engagement control member, the spring means acting on the movable contact and on said rocker
The main advantage of this mechanism is that at the moment of triggering, there is a kind of "shear" effect, which takes off.

forced contacts. The heel of the trigger lever, moved for example by the action of a rod secured to the movable core of an electromagnetic coil, pushes the movable contact and tends to simultaneously pivot this movable contact and the movable contact carrier, so which movable contact initially undergoes a translational movement, in the direction of the distance from the fixed pivot axis of the movable contact carrier, with sliding against the fixed contact, which results in shearing the bonding or soldering the contacts.

 According to an advantageous embodiment, the scale comprises two pins, introduced into bearings formed on the side walls of the boot of the apparatus, and two parallel parts whose inner faces have radial grooves located opposite, for the guide of the movable axis which crosses the lights of the movable contact carrier and the notch of the cam, the above-mentioned means & spring preferably being constituted by a single spring, in the shape of a stirrup, having two windings placed respectively around pins of the rocker, and a central part resting on the movable contact. This unique spring, with double winding, provides both the contact pressure functions in the "engaged" position, separation of the contacts when triggering or voluntary opening command, and- recall of the entire mechanism (rocker , cam, manual control member to engage) to the triggered position ".

 According to a first possibility, the apparatus includes a separate push button and a separate push button, the push button, mounted to slide with a certain lateral play, being articulated to the rocker.

 According to a second possibility> the device comprises a single control lever, for manual engagement and disengagement control, this handle being linked in rotation to the rocker.

 Given these various possibilities, and also to be able to easily "personalize the device which is the subject of the invention, it advantageously comprises a box, preferably consisting of two adjoining half-boxes, serving to hold the fixed pivot axes of the movable contact carrier, of the cam and of the trigger lever, and also forming the bearings of the rocker pins, this housing having, on the side of said rocker, an opening closed by an attached cover carrying the manual engagement control members and it is thus possible to store all identical circuit breakers, which are missing only the cover and the manual control members, fitted later, which considerably simplifies manufacturing and storage. subsequent of a cover carrying the manual control members also makes it possible to choose, depending on the type of fixing of the circuit breaker to its support, the type of cover app appropriate with the appropriate type of button.

 For the same purpose, in the bottom of the housing are provided taraddés-inserts allowing the subsequent attachment of the electrical connection means, whether these are constituted by pins or tongues.

 According to another characteristic, enabled by the structure of the triggering mechanism, with a view to removing the bimetallic strip and the movable contact from the destructive effects of the overload current for at least part of the duration of the electric arc, the triggering mechanism is such that, when the movable contact is as far as possible from the fixed contact, it is brought close to a conductive blade, constituting the support of the bimetallic strip, and located opposite a part of the fixed contact holder. The bimetallic strip is thus short-circuited by the electric arc, which is "transferred" from the movable contact to the aforementioned conductive strip.

 In the case where it is desired to associate several monopolar switch-circuit breakers, in order to produce a multipolar device, by coupling the various unitary devices so as to obtain a "cascade" trip, it is provided, according to the invention, that the switches circuit breakers are placed side by side, their rockers being linked in rotation by means of a key, coupling the neighboring pins of two rockers, while a slide, in the general shape of "E" and curved, housed and guided in lights in an arc formed on the adjacent walls of the housings of two unitary circuit breakers, cooperates with transverse rods carried by the cam and by the trigger lever of each interrupter - disjunctor. If the spring is united only, a characteristic already stated above, thwarted effects are however likely to be exerted on the slide; this is avoided by providing for a duplication of the trigger levers: each lever consists of two adjacent blades, pivotally mounted on the same axis, one of these blades having the cam hooking notch, as well as a tab supporting one of the aforementioned transverse rods, while the other blade includes the heel cooperating with the movable contact, the electro-thermal means, such as bimetal, acting on one of the blades of this lever, while the electro-magnetic or manual means, such as the movable core of electro coil, magnE- tick, act simultaneously on the two blades of the lever.

A certain connection between these two blades can be further provided by a spring wound on their common axis.

In any case, the invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawing representing, by way of nonlimiting examples, some embodiments of this circuit breaker switch
Figure 1 is a longitudinal sectional view of a monopolar circuit breaker according to the invention, with two control pushbuttons, in the "on"position;
Figure 2 is a cross-sectional view thereof, along 2-2 of Figure 1;
Figure 3 shows the same device, without its connection terminals or its manual controls, in the "triggered n"position;
Figure 4 is a cross-sectional view, along 4-4 of Figure 3;
Figure 5 is a longitudinal sectional view similar to Figure 1, illustrating the magnetic separation and the forced opening of the contacts;
Figure 6 shows, very schematically, the electrical circuit of the device in the "engaged"position;
Figure 7 is a partial view, on a larger scale, showing the detail of the mechanism of this device, in the "engaged"position;
Figures 8 to 12 are perspective views showing various parts isolated from this mechanism;
Figure 13 is another representation of the electrical circuit of the device, illustrating the transfer of the arc in short-circuit, when tripping ;;
Figure 14 is a longitudinal sectional view of another switch-circuit breaker according to the invention, similar in its mechanism to the device of Figure 1 but with a single pivoting control handle, and shown during tripping;
Figure 15 is a cross sectional view along 15-15 of Figure 14;
Figure 16 is a partial sectional view of a variant, with amplification of the electromagnetic trigger;
Figure 17 is a partial sectional view of another variant, with hydro-magnetic release;
Figure 18 is a longitudinal sectional view, along 18-18 of Figure 19, of an assembly making a xultipolar devicev
Figure 19 is a cross-sectional view of this assembly, along line 19-19 of Figure 18; ;
Figure 20 shows isolated F in perspective, the connecting piece between the scales of the unitary devices of this assembly;
Figure 21 shows, isolated and in perspective, the connecting piece between the cams and the trigger levers of the unitary devices of this assembly.

 Figures 1 to 5 show a first circuit breaker switch according to the invention, included an insulating housing 1, of generally parallelepipedal shape and consisting of two symmetrical dexi-bootmakers joined together, the upper part of which has a rectangular opening 2, closed by a cover reported 3. This cover 3 is traversed by an engagement push-button 4 and by a trigger push-button 5, axially movable in two parallel directions, the engagement push-button 4 being slidably mounted with a certain lateral clearance. face of the case 1 opposite the cover 3, project two pins 6 and 7, held by means of screws 8 and 9, and constituting the connection terminals of the switch-circuit breaker. The pin 7 is connected to a conductive part 10 fixed to the shoemaker 1 and constituting the fixed contact holder, while the fixed contact itself, located in the upper part and facing downwards, is indicated at 11. The another pin 6 is connected, by a conductor 12, to a first end of the winding of an electromagnetic coil 13.

The second end of this winding is connected, by a conductor 14, to the blade-shaped conductive support 15 of a bimetal strip 16. Finally, to close the electrical circuit, the free end of the bimetallic strip 16 is connected, by a conductor flexible 1 ?, to the movable contact 18 which cooperates with the fixed contact 11. In Figure 6 there is shown, very schematically, this electrical circuit.

 The movable contact 18 has a lever shape and is pivotally mounted, at an intermediate point, on a transverse axis 19 located at one end of a movable contact carrier 20, itself pivotally mounted, at its other end, on a fixed transverse axis 21 held between the two side walls of the boot 1. These side walls have two circular openings, located opposite, into which are introduced the two pins 22 of a rocker 23 which is further articulated, around dlun axis 24, to a yoke 25 integral with the interlocking push-button 4. The lever 23, formed of two parallel parts, has on the inside faces of these parallel parts two grooves 26, oriented radially (relative to the axis trunnions) and located opposite.

These grooves 26 serve to guide a movable transverse axis 27, which passes through two slots 28 in the form of an arc of a circle formed on the movable contact carrier 20.

 The movable contact carrier 20 is formed by two parallel parts, each having one of the above-mentioned openings 28, and between which is inserted a cam 29, of generally triangular shape, also pivotally mounted on the fixed axis 21. The cam 29 has a notch 30, of generally rectilinear shape but having, near its bottom, a slight notch 31. The movable axis 27, guided by the grooves 26 and passing through the slots 28, is also engaged in this notch 30.

 A spring 32, in the shape of a stirrup, has two windings placed respectively around the pins 22 of the rocker 23. One end of this spring 32 is supported on the fixed axis 21, and its other end is linked in rotation with the lever 23. The central part of the spring 32, in the shape of a stirrup, bears on the movable contact 18.

On another fixed transverse axis 33, also held between the two side walls of the housing 1, is still pivotally mounted a trigger lever 34. A first branch of the lever 34 has a notch 35, capable of cooperating with a spout 36 of the cam 29; the free end of this branch comes into mechanical contact with a movable rod 37, integral with the movable core 38 of the electromagnetic coil 13. This first branch of the lever 34 carries, moreover, a lug 39 whose free end comes to- below the bimetallic strip 16, this tab having, as
this can be seen in figure 15, a U-folded shape with
an adjustment screw 40. The other branch of the lever 34 compor
te, at its free end, a heel 41 which cooperates directly
lying with the movable contact 18, this heel 41 taking place,
like cam 29, between the two parallel parts of the
movable contact carrier 20.

To better explain the details of the mechanism, the
figure 7 gives a partial representation on scale
enlarged. In addition, Figures 8 to 12 show
in isolation, respectively: the snap button 4
with its yoke 25, the fixed contact carrier 10 (with the
fixed contact ??), read mobile contact 18, rocker 23, and
the spring 32 with double winding.

Between part of the fixed contact port 10 and the
support 15 of the bimetallic strip 16, located opposite, the shoemaker
1 also contains a series of deflectors 42 having the function of ensuring the breaking of a possible electric arc.

In the "engaged" position, shown on the
Figures 1 and 7, the engagement push button 4 is
obviously pressed, and the rocker 23, linked to the button 4 by the axis 24, comes to occupy a position such that the movable axis 27 is placed
on the one hand, near the left extremity (in the figures) of the lights 28 of the mobile contact holder 20; - on the other hand, near the bottom of the notch 30 of the cam 29, stopped against the notch 31.

 The cam 29 is itself stopped, by abutment of its beak 36 on the notch 35 of the lever 34, which requires the movable contact carrier 20 to remain in a raised position, for which the movable contact 18 is applied to the fixed contact Il by the action of spring 32.

 In the triggered N position ", shown in FIG. 3, the cam 29 occupies a position which is not very different from the previous one, but the lever 23 comes into another position, for which the movable axis 27 is place -on the one hand, at the right end of the lights 28 of the movable contact carrier 20; -on the other hand, in the part of the notch 30 of the cam 29 which is the furthest from the bottom of this notch.

 The position of the axis 27 then imposes on the movable contact carrier 20 a lowered position, for which the movable contact is kept away from the fixed contact 11. The action of the spring 32 on the rocker 23 tends to maintain the separation of the contacts Il and 18.

 The transition from the "engaged" position to the "triggered" position, defined above, can be carried out: - either under the sole action of the bimetallic strip @@ (deforming in the direction of the arrow 43 indicated in FIG. 1 ), the bimetallic strip carrying with it the trigger lever 34 by means of the tab 39; - or with intervention, in the event of a very high overcurrent, of the electromagnetic coil l) -, the rod 37 irises to the movable core 38 pushing the lever 34; either by voluntary manual action on the on-or-off end of triggering 5, ai makes it possible to push the lever 34 by means of the movable jewel 38 and the rod 37.

 In all three cases, the trigger lever 34 pivots in the direction of the arrow 43, so that, on the one hand, notch 35 in lowering releases the spout 36 from the cam 29 and, on the other hand, its heel 41 while rising pushes the part of the movable contact 18 located to the left C the pivot axis 19 of the latter. The release, by screen 35, of the spout 36 of the cam 29 allows the pivoting of the latter around the axis 21 in the opposite direction to the arrow 44, which allows the displacement of the axis 27 in the notch 26 of the rocker 23, in the direction of the opening of this notch. The movable contact carrier 20 is then pivoted in the same direction under the action of the spring 32 causing, therefore, the separation of the movable contact 18 and the fixed contact 11. During tripping, the movable contact 18 passes through an extreme lower position (see Figure 14), before coming to a stop in the "triggered" position of Figure 3.Simultaneously, the spring 32 rotates the rocker 23, in the opposite direction ire clockwise, corresponding to the recall of the engagement push button 4 in its "out" position. Through the movable axis 27, the cam 29 is also brought back into the " triggered "in Figure 3.

 If the triggering occurs while a pressure is maintained on the engagement button 4, the spring 32 pushes the movable contact 18 downward, which also drives the movable contact carrier 20 downwards. through the lights 28, the movable axis 27 moves radially and outward, relative to the rocker 23 kept stationary, which causes the cam 29 to pivot about the axis 21, in the direction of Clockwise.

 An important feature of tripping operation, illustrated in Figures 5 and 7, is the forced separation of the contacts. It is assumed that at the initial triggering moment, the movable contact 18 remains glued or welded to the fixed contact 11. The heel 41 of the trigger lever 34, while rising, pushes the part of the movable contact 18 located to the left of the axis 19, which also tends to pull upwards this axis 19, as well as the movable contact carrier 20, which pivots around the fixed axis 21 counterclockwise (arrow 44 It is understood that, in this way, 1 the right end of the movable contact 18, applied to the fixed contact 11, undergoes a translation along the arrow 45, by sliding against the fixed contact 11, which has for shearing effect bonding or soldering of contacts. As soon as the two contacts are thus separated, the mechanism is released and comes into the "tripped" position of FIG. 3, according to the process already described above.

 As shown in FIG. 13, during tripping, when the movable contact 18 departs from the fixed contact 11, the electric arc is transferred from the movable contact 18 to the support 15 in the form of a blade, so that the blade 16 becomes found short-circuited. The circuit is temporarily closed by terminal 6, the electromagnetic winding 13, the blade 15, the fixed contact carrier 10 and terminal 7. Maintaining the winding 13 in this circuit does not constitute a drawback, because this winding is robust and limits the current.

 To rearm the device, after a trigger, it is enough to press the engagement push-button 4, which makes the lever 23 pivot in the clockwise direction. The cam 29 pivots, in the same direction, about the axis 21, until its beak 36 is stopped by the notch 35 of the lever 34.

The position of the notch 30 is then fixed and, the rotation of the rocker 23 continuing, it forces the movable axis 2? to describe, in the grooves 26, a radial trajectory directed towards the center. The mobile contact holder 20 is thus pulled upwards, by means of its lights 28, which brings the mobile contact 18 back against the fixed contact 11. The whole mechanism is finally brought back to the "engaged" position already described above.

 If the fault which caused the sudden trip when the device is to be rearmed, the same trip is repeated even if the operator maintains his action on the locking device.

 FIGS. 14 and 15 show a first variant of the switch-circuit breaker according to the invention, in which the trigger push-button is eliminated, and the engagement push-button is replaced by a pivoting control lever 41. This lever is linked in rotation to the rocker 23, and constitutes a single control member, fulfilling both the role of engagement means and trigger means. The internal mechanism of the device is not modified and it is shown, in FIG. 14, during tripping, when the movable contact 18 is as far as possible from the fixed contact 11, and brought very close to the blade 15, to cause the transfer of the arc as already described above (with reference to FIG. 13).

 In FIG. 16 is shown, partially, another variant of the device according to the invention, with a device for amplifying the electromagnetic triggering, making it possible to lower the triggering threshold by the coil 13. indeed there is provided, between the rod 37 secured to the movable core 38 and the trigger lever 34, the insertion of a pivoting pallet 46 in the shape of a "T acting in the manner of a lever as shown in the dashed line .

 According to yet another variant, illustrated in FIG. 17, it is also possible to provide a hydromagnetic trip, with a movable core 38 of the coil 13 produced as a cylinder-piston assembly.

 Other variants and adaptations, not shown in the drawing, are conceivable - Instead of terminals 6 and 7 in the form of pins, the connection of the device to an electrical network is possible by any suitable means in the form of plugs, blades , bars, etc ..., fixed by any process. Connection can also be done directly by the internally threaded bushings 47 and 48 (see figure 14).

- A device for adjusting the triggering threshold of the device can be provided, in particular by providing that the support 15 of the bimetallic strip 16 is pivotally mounted between the side walls of the housing 1, its angular position (therefore that of the bimetallic strip) being fixed by a rotary adjustment cam.

The bimetallic strip 16 can also be supplemented by a system for compensating for its deformations due to the ambient temperature.

-Depending on the desired breaking capacity, the device ensuring the breaking of the electric arc can be sized and / or arranged differently from what is shown in the drawing, on the right side of Figures <, 3.5 and 14.

-This device can also be completed by a coil intended for the magnetic blowing of the arc.

-The device may include a case for auxiliary contacts, in which case the control of these contacts is easily ensured by means of a movable rod, actuated by a part 49 of the movable contact carrier 18.

 FIGS. 18 to 21 illustrate yet another variant of this device, showing the possibility of coupling several switch-circuit breakers, to make a multipole device. The example in the drawing shows the coupling of two circuit breaker switches.

In this case, these are placed with their boxes 1 arranged side by side, the openings 2 being in the same plane (see Figure 19). On the side walls of these two housings 1 applied one against the other, lights are formed in an arc of a circle 50. Each switch-circuit breaker has an internal mechanism partially shown, and produced as described above. The connection between these mechanisms is ensured - on the one hand, by means of a rotating part 51, constituting a kind of key, the shape of which characterized by diametrical ribs 52 is clearly visible in FIG. 20, and which rotates the two rockers coaxial 23, by coupling their neighboring pins 22 (which have diametrical slots 53, complementary to the ribs 52 nt can also receive the ends of the springs 32)) - on the other hand, by means of a movable part 54, so of slide in the general shape of "H" and curved, which is partially housed and guided in the lights in an arc of a circle 50, the configuration of the part 54 clearly appearing in FIG. 21.

 This last part 54 makes a coupling between the cams 29 and the levers 34 of the two unitary devices. To this end, each cam 29 carries a transverse rod 55, cooperating with a first end of the part in ts H n 54, while each lever 34. Carries another transverse rod 56, cooperating with the second end of the part in n H n 54.

 The coupling thus produced allows triggering "in cascade", the triggering of a device causing that of the other, thanks in particular to the sliding piece in "H" 54 which links the movement of the cam 29 of one of the devices to the trigger lever 34 of the other device.

To avoid thwarted effects on the part 54, it is however advisable to split the levers 34, according to an arrangement appearing in FIGS. 1 to 5, 7, 14 and 15.

Each lever 34 consists of two adjacent blades, pivotally mounted on the same axis 33. One 34a of these blades has the catch 35 for hooking the cam 29, as well as a lug 57 which supports the transverse rod 56. The other blade 34b has the heel 41 which causes the contacts to take off. The movable rod 37, integral with the core of the coil, acts simultaneously on the two blades constituting the lever 34. A spring 58 (see FIG. 7), wound around the common axis 33, ensures the return of the two blades in a common angular position.

 According to the same arrangements, it is obviously possible to produce a multipolar device by coupling more than two unitary circuit breakers.

 As is obvious, and as already follows from the above, the invention is not limited to the sole embodiments of this switch-circuit breaker which have been described above, by way of examples; on the contrary, it embraces all the variants produced according to the same principle, whatever the modifications and adaptations of detail.

Claims (4)

-CLAIMS 1.-Electrical switch-circuit breaker, of the type comprising a fixed contact, a movable contact, manual engagement and release control members, means for hooking the mobile contact holder and the control member manual latching in "latching" position of the electro-thermal and / or electromagnetic means for actuating, in the direction of disengagement, the attachment means of the movable contact carrier, and subsequently releasing the manual control member d and closing, the movable contact being subjected to the action of spring means tending to keep it applied to the fixed contact, and the latching control member being subjected to the action of spring means tending to recall it in the "tripped" position, characterized in that it comprises a movable contact (18) pivotally mounted on a pin (19) located at one end of the movable contact carrier (20) itself pivotally mounted, at its other end, on a fixed axis (21), axis on which are t further pivotally mounted a cam (29) having a spout (36) cooperating with a notch (35) of a trigger lever (34) consisting of a blade or two adjacent blades, pivotally mounted on another fixed axis (33 ), one branch of which is capable of being actuated by the electro-thermal (16) and / or electromagnetic (13) means, or by the manual triggering control member (5), and another branch has a heel (41) cooperating with the movable contact (18), said cam (29) having a notch (30) with a notch (31) close to its bottom, crossed by a movable axis (27) which passes through also at least one light in the form of an arc of a circle (28), formed on the movable contact carrier (20), and which is guided in the radial direction on a rocker (23), pivotally mounted on an axis parallel to the pivot axis (21) common to the movable contact carrier (20) and to the cam (29), and linked to the manual engagement control member (4; 4 '), the spring means (32) acting on the mobile contact (18) and on said rocker (23).  2.- switch-circuit breaker according to claim 1, characterized in that the rocker (23) comprises two pins (22), introduced in bearings formed on the side walls of the boot (1) of the device, and two parallel parts the inner faces of which have radial grooves (26) located opposite, for guiding the movable axis (27) which passes through the openings (28) of the movable contact carrier (20) and the notch ( 30) of the cam (29).  3. - Switch-breaker according to claim 2, characterized in that the aforementioned spring means are constituted by a single spring (32), in the shape of a stirrup, having two windings placed respectively around the pins (22) of the rocker (23), and a central part bearing on the movable contact (18).  4.- switch-circuit breaker according to claim 2 or 3, and coxpretant an engagement push button and a separate trigger push button, characterized in that the engagement push button (4), mounted sliding with a certain lateral clearance is articulated to the rocker (23).  5.- switch-circuit breaker according to claim 2 or 3, and comprising a single control handle, for manual control of switching on and off, characterized in that this lever (4 is linked in rotation to the rocker (23) 6.- switch-circuit breaker according to 1 any one of claims 2 to 5, characterized in that the movable contact carrier (20) is formed of two parallel parts, each having one of the two lights (28) through which movable axis (27), and between which the cam (29) is inserted, the heel (41) of the trigger lever (34) also taking place between these two parallel parts.  7. A switch-circuit breaker according to any one of claims 2 to 6, characterized in that it takes a housing (1), preferably consisting of two adjoining half-housings, serving to hold the fixed axes (21,  53) - pivoting of the movable contact carrier (20), of the ca  me (29) and the trigger lever (34), and also forming the  bearings of the pins (22) of the scale (23), this shoemaker  (1) having, on the side of said rocker (23), an open  structure (2) closed by an attached cover (3) carrying the  manual interlocking and tripping control elements  (4.5; 4t).  8.- Switch-circuit breaker according to any one of claims 1 to 7, characterized in that, with a view to subtracting the bimetallic strip (16) from the effects of the overload current during at least part of the duration of the arc  electric, the triggering mechanism is such that, when the movable contact (18) is as far as possible from the fixed contact (11), it is brought near a conductive blade (15), constituting the support for the bimetallic strip ( 16), and  located opposite a part of the fixed contact carrier (10).  9. A switch-circuit breaker according to any one of claims 2 to 7, characterized in that, in the case where it is desired to combine several monopolar interrupter-circuit breakers, to produce a multipolar device, by coupling the different devices unitary so as to obtain a "cascade" triggering, it is intended that the switch-breakers are placed side by side, their rockers (23) being linked in rotation by means of a key (51), coupling the pins neighbors (22) of two rockers (23), while a slide (54), in the general shape of n H n and curved, housed and guides in lights in an arc (50) formed on the adjacent walls of the bootmakers (1) of two dis-switches: Unit junctions, cooperates with transverse rods (55, 56) carried by the cam (29)  and by the release lever (34) of each switch  circuit breaker.  10.- switch-circuit breaker according to claim 9, characterized in that each trip lever (34) consists of two adjacent blades, pivotally mounted on the same axis (33), one (34a) of these blades having the notch for hooking (35) the cam (29), as well as a tab (57) supporting one (56) of the aforementioned transverse rods, while the other blade (34b) comprises the heel (41) cooperating with the movable contact (18), the manual and / or electromagnetic means, such as the movable core of the electromagnetic coil (13) acting simultaneously on the two blades (34a, 34b) of the lever (34) while the electro means -thermals, such as bilas (16) act only on a blade (34a) of the lever (34).