FR2673487A1 - PROTECTION SWITCH INCORPORATING A TRIGGERING MAGNETOTHERMAL SUB-ASSEMBLY. - Google Patents

Abstract

This protection switch of the double-break multipolar circuit breaker type comprises, for each pole, a contact bridge (17) with a median plane (P) as well as a magnetothermal tripping sub-assembly (30). This sub-assembly comprises a base (72) of rectangular shape extending longitudinally in a direction perpendicular to the median plane (P) and carrying a bimetal thermal trip unit (28) and an electromagnetic trip unit with striker lever (29) comprising a coil (91) wound around a tube (90) of the carcass-coil and a magnetic circuit housed in the tube and consisting of a fixed core (92) and a plunger (93) coaxially aligned. The bimetal (55) and the magnetic circuit (92, 93) are parallel and the striker lever (41) is coupled to the plunger core (93) and is pivotally mounted on the carcass of the coil extending laterally to the bimetal.

Description

PROTECTION SWITCH INCORPORATING A SUB-ASSEMBLY

TRIGGERING MAGNETOTHERMAL.

  The present invention relates to an electrical apparatus

  protective switch type double circuit breaker, comprising in a housing: at least one polar current path established between two electrical connection terminals and provided with a movable contact bridge with median plane, cooperating with fixed contacts; a tripping magnetothermal sub-assembly associated with one of the terminals of each polar path and comprising:

  a thermal trip device fitted with a bimetallic strip mounted

  pendulumally on a flat conductive support, at one end thereof, said bimetallic strip being electrically connected to one of the fixed contacts and being capable of controlling the opening of the contacts via a tripping mechanism in response to a current overload, an electromagnetic trip device comprising: a coil-shell molded in insulating material and having a tube around which is wound a control coil whose two ends are respectively connected to the bimetallic strip support and to the

  terminal associated by respective parts of liai-

  its electric sound, a fixed magnetic core and a mobile magnetic core mounted coaxially inside the tube of the coil carcass, the mobile core moving by sliding towards the fixed core in response to a short-circuit current and being recalled by rest position by an elastic return member, a striker associated with the movable core and capable of actuating a drive member of the contact bridge in the direction of opening of the contacts as a result of the displacement of the movable core in response

at a short circuit current.

  In such known circuit breaker devices, however, it turns out that by their design, the tripping magnetothermal sub-assemblies are relatively

  bulky and bulky These magnetic sub-assemblies

  are also relatively complex to achieve.

  due to difficulties in assembling the thermal trip unit and the electromagnetic trip device with striker

of each of them.

  The object of the invention is to remedy these drawbacks and to produce, for each pole of a switch device of the type mentioned above, the same magnetothermal tripping sub-assembly which is by design

great compactness.

  Another object of the invention is to provide such a sub-

  suitable magnetothermal assembly which is easy to

  assemble and mount in the switch device.

  According to the invention, an electrical switch device

  protection of the type described above, is more

  specifically characterized in that: the magnetothermal sub-assembly further comprises a

  base in insulating material of generally rectangular form

  strip extending longitudinally in one direction

  perpendicular to the median plane, exhibiting an

  -3- anterior part close to said median plane and serving as a receptacle in which is fixedly housed flat the support carrying the bimetallic strip in an arrangement such that the bimetallic strip is located in the vicinity of the anterior end of the base; the coil housing of the electromagnetic trip unit also has two parallel flat wings joined transversely by a flat spacer and mounted

  vertically, respectively on the two upper edges

  longitudinal laughs of the base, the carcass tube-

  coil perpendicularly surmounting said spacer

  so that said tube and the bimetallic strip are parallel

  coplanar links, one end of the movable core in the rest position projecting from the tube, on the side of the base; the striker of the electromagnetic trip device is a lever coupled to the projecting end of the movable core, pivotally mounted on at least one of the two wings of the coil carcass and extending laterally to the bimetal in the direction of the median plane and- beyond the end

anterior of the base.

  In a preferred embodiment, the two large faces of the bimetal strip are located in a plane parallel to the

  longitudinal direction of the support, and the lever percu-

  tor has two parallel arms connected transversely-

  ment by a coupling spacer integral with the projecting end of the movable core, one of the two arms being longer than the other and constituting a percussion arm extending laterally to one of the large faces of the bimetallic strip , these two arms carrying respectively, on their respective external faces, two pivots

  coaxial engaged in corresponding holes practi-

  qués in terminal conformations provided on the two wings of the coil carcass, at the base of these,

  and located substantially at the foot of the bimetallic strip.

  4 - The base of the magnetothermal sub-assembly and the wings

  of the coil carcass advantageously have nerves

  guide plates intended to slide in grooves made in the housing when mounting the magnetothermal sub-assembly in the housing. Other characteristics and advantages of the invention

  will appear better in the detailed description which follows

  and refers to the appended drawings given solely by way of nonlimiting example and in which: FIGS. 1 and 2 are schematic views

  partial elevation of a disjointed device

  double cut-off device equipped with a magnetothermal tripping sub-assembly according to the invention, respectively in the closed and open positions in the event of a short circuit; Figure 3 shows an enlarged view

  in exploded perspective of the magnetic sub-assembly

  thermal associated with a connection terminal according to Figure 1;

  Figure 4 is a perspective view of the sub-

  assembly of FIG. 3, after assembly of the

  thermal release on the base and assembly

  blocking of the components of the electro-

  magnetic striker in association with the terminal; Figure 5 is a top view of the striker lever of the electromagnetic trip device; Figure 6 is a perspective view of the striker lever coupled to the movable magnetic core of the electromagnetic trip device; -

  Figure 7 is a perspective view of the sub-

  assembly of FIG. 4, after assembly of

  the electromagnetic trigger association

  tick / terminal on the base; Figure 8 is a view similar to Figure 7 showing the association of the sub-assembly with a conductive part carrying a fixed contact; Figure 9 is a perspective view of the contact carrier part according to Figure 8;

  Figure 10 is a perspective view through

  part of the contact piece in the inverted position, showing the fixed contact; and Figure 11 shows schematically in

  partial cross section the device

  trunk of Figure 1 along a plane passing through the sliding axis of the movable core of the

  electromagnetic trigger, showing the pre-

  sence of grooves in the housing serving as guides for the magnetothermal sub-assembly during

of its mounting in the housing.

  The electrical protection switch, designated by the general reference 10 in FIGS. 1 and 2, is

  a double-pole low-voltage multipole circuit breaker

  pure of which only one pole has been represented.

  The apparatus 10 comprises an insulating housing 11 composed of a base 12 and a cover 13 The housing comprises, on its front face, a projecting part 14 and, on its rear face, elements 15 serving for the fixing of

  the device by snap-fastening on a standard profile.

  Each pole of the device 10 comprises a contact bridge 17 carrying two movable contacts 18, 19 arranged on either side -6- and on the other of a median plane P common to all

  poles and intended to occupy either a closed position

  in which they cooperate respectively with two fixed contacts 20, 21 formed on respective conductive parts 22, 23, that is to say an open position in which they are separated from the fixed contacts 20, 21 continued

  an automatic trip in the event of a surin- fault

  tensity or manual control.

  The conductive part 22, Figures 1 and 2, is directly connected to a first electrical connection terminal

  26, while the conductive part 23 is electrically connected

  next to a second electrical connection terminal

  27 via a series electrical assembly consisting of a declen-

  thermal bimetallic strip designated overall at 28 for protection against overload currents, and a

  electromagnetic trip device with striker designated globa-

  Also at 29 for protection against short-circuit currents. In accordance with the invention, the thermal 28 and electromagnetic trip releases 29 of each pole, as well as the associated connection terminal 27, are part

  integral of the same monobloc trigger trigger

  magneto-thermal designated by the general reference 30,

  which will be described in detail later.

  The apparatus 10, FIGS. 1 and 2, also comprises a triggering mechanism with lock 31, common to

  all the poles and arranged in a central compartment

  tral 32 of flat shape, i.e. relatively thick

  vement weak perpendicular to the median plane P. In Figure 1, there is partially shown an embodiment of the lock 31 in the armed position; this one

  comprises a pivoting hook 33 having a through spout

  sant a light 36 formed in a side wall 31 a

  of the lock located on the side of the magneto- sub-assembly

  7 - thermal 30, and being engaged with a bearing surface of an opening 37 made in the vicinity of the upper end of a flat piece in the form of a strip 38 adjacent to the side wall 31a of the lock, thus that an opening member 39 subject to the action of the cro-

chet 33.

  In this example, the striker of the electromechanical release

  gnetics 29 of each pole is a pivoting lever 41 which, in normal service (Figure 1), on the one hand is engaged with a bearing surface of an opening 42 formed in the vicinity of the lower end of the strip 38 and, on the other hand, opens out as close as possible to the median plane P by passing through a lumen 43 formed in the

  side wall 31 has lock 31.

  The contact bridge 17, FIG. 1, is biased in the direction of closing of the contacts by a return and pressure spring 44 furthermore bearing against the bottom of the housing 11 The contact bridge 17 is controllable in the direction of the opening of the contacts by a drive pusher 45 carrying the bridge and belonging to a

  part common to all the poles, which part

  taking as many pushers as there are poles.

  The pusher 45 is itself driven, following a short

  circuit detected by the electromagnetic trip device 29 of each pole, by the striker lever 41 pivoting in a plane substantially transverse to the median plane, and this after triggering of the lock 31, whose response time is greater than the percussion time of the lever

  striker 41, by means of the strip 38 driven parallel-

  parallel to the median plane under the action of a traction exerted by the lever during its pivoting; the striker lever 41 therefore constitutes a very rapid contact opening member, while the opening member 39 of the lock 31 in the triggered position constitutes in this case a member for confirming the opening of the 8 - contacts, l organ 39 moving parallel to the plane

median (Figure 2).

  The pusher 45, Figure 1, is also driven by the opening member 39 of the lock 31 following the release of the latter either by a control member

  manual, either by a control device (not shown

  sensed) subject to a trigger bridge shown partially at 48 in FIGS. 1 and 2 and urged by the thermal trigger 28 of each pole in response

  to an electrical overload detected by it.

  One thus obtains in each of the operating modes (circuit breaker or manual mode) a double break; arc extinguishing devices 49 are associated with each

breaking chamber.

  In FIGS. 1 and 2, a button is shown at 50

  opening pushbutton or "stop" button causing the

  release of lock 31, and at 51 a push button

  rearming and closing evening or "start" button, these push-buttons 50 and 51 being arranged in compartment 32 so as to be able to protrude from the front of the housing 11 It should be noted here that the push-buttons could be replaced by example by rocker buttons, or by a

  single rotary handle for resetting, closing and opening

  without departing from the spirit of the invention.

  The strip 38, the opening member 39 and the lever

  cutter 41 are in the high position (figure 1) in normal operating conditions, the start push button 51 being pressed They are all three in the low position (figure 2) when a short circuit has been detected by the electromagnetic trip device 29; on the other hand, the opening member 39 is only in the low position when an electrical overload has been detected by the thermal trigger 28 or when the

stop push button 50.

  With reference to FIG. 3, the thermal trip device 28 of the magnetothermal trip sub-assembly 30 of each pole comprises a thin bimetal strip 55 of generally elongated rectangular shape extending in a plane QQ 'and having a first free end 56 and a second end or foot 57 assembled by any fixing means

  suitable on a support plate 59 of general shape

  rectangular rail, of given thickness e, made of an electrically conductive material and extending in a plane RR 'perpendicular to the plane QQ' As shown in Figure 3, the bimetallic strip 55 is arranged so that its two large lateral faces opposite 55 a, 55 b are located in the plane QQ 'parallel to the direction

longitudinal of the plate 59.

  In the example illustrated in FIG. 3, the trigger 28 also includes a heater 61, here in the form of a ribbon, which is applied against the bimetallic strip 55 via an appropriate means of electrical insulation, in this case a thin rectangular insulating sleeve. 62 surrounding the bimetallic strip 55, approximately between the two ends

  56, 57 of the latter The heater 61 has a pre-

  first end 64 intended to be electrically connected to the conductive part 23 (FIGS. 1 and 2) carrying the fixed contact 21 and a second end 65 connected, for example by welding, at a particular point of the bimetallic strip 55

  located near the free end 56 thereof.

  The support plate 59 for the bimetal strip consists of a first portion 67, of width 1, carrying at the end the bimetallic release 28, and of a second portion 68

  narrowed relative to the first and extending the latter

  ci via two transverse steps

  only one of which is visible at 69 in FIG. 3; the pla-

-

  quette 59 has, at the end of its portion 68 oppo-

  sée to that carrying the bimetallic strip, part 70 folded to 90.

  The sub-assembly 30, FIG. 3, comprises a molded insulating base or base 72 of rectangular shape, of length L greater than that of the plate 59 and of the same width 1 as the portion 67 of the plate carrying the bimetallic strip 55, and having a front end 73 and a rear end 74 The base 72 is provided, on its two longitudinal upper edges 76, 77, with two respective longitudinal risers 78, 79 insulating and

  moldings, having a height h slightly higher than

  smaller than the thickness - of the plate 59 These extensions 78, 79 are arranged in respective locations such as after assembly of the bimetallic release 28 and its

  support plate 59, the two transverse recesses

  saux 69 of the wafer 59 come into respective support-

  ment against the two risers of the base 72 during the

  flat plate, on the upper face 81 of the base, of the plate 59 supporting the bimetallic strip 55, which bimetallic strip is then located in the vicinity of the anterior end 73 of the pedestal, as visible in FIG. 4 The pedestal 72 also has a insulating fixing pin 83 molded

  which cooperates with an opening 84 made in the door

  tion 68 of the wafer 59 when mounting the wafer assembly 59 bimetal thermal trip device 28 on the

base 72 (see figures 3 and 4).

  With reference to FIG. 3, the electromagnetic release

  striker tick 29 of the sub-assembly 30 of each pole has a coil carcass, designated by the reference

  general 86 in FIG. 3, molded from an iso-

  lante and having two parallel flat wings 87, 88 with the same center distance as that existing between the two

  extensions 78, 79, and joined transversely to their top

  puts by a flat spacer 89 surmounted perpendicularly

  rement by a hollow tube 90 around which is wound

  there - a control coil 91, as visible in the figures

1 and 2.

  In FIGS. 1 and 2, the electromagnetic trip device 29 also comprises a magnetic circuit housed inside the tube 90 of the coil carcass and formed of a fixed cylindrical core 92 and of a movable core with

  sliding conformed to cylindrical plunger 93 axial-

  ment aligned with the fixed core 92 The fixed core 92 is made integral with the tube 90, at the upper end of the latter, by any suitable holding means, and a helical return spring 94 is mounted in abutment on the pole faces respective, opposite one of

  the other, fixed 92 and mobile 93 cores.

  The plunger core 93 is extended axially by a tail protruding from the tube 90 when said core 93 is in the rest position (FIG. 1) and coupled to the

  striker lever 41 of the electromagnetic trip device.

  In the embodiment illustrated in Figures 3

  and 5, the striker lever 41 has two parallel arms

  lèles 96, 97 (Figure 5), one of which (96) is longer than the other (97) and constitutes a percussion arm, connected transversely by a coupling fork 98 with two teeth between which is inserted the tail 95 of the nucleus

  plunger 93, as seen in Figure 6.

  The two arms 96, 97 of the striker lever 41, FIG. 5, carry, on their respective external faces, two

  coaxial pivots 101, 102 intended to come to engage res-

  pectively in two corresponding orifices 103, 104 (FIG. 3) formed in terminal conformations, 106 provided on the two respective wings 87, 88 of

  the coil carcass 86, at the base of these.

  The striker lever 41 is preferably produced by

lage in an insulating material.

  12 - As shown in FIG. 3, the coil carcass 86 of the electromagnetic trip device 29 also has two parallel vertical sides 109, 110 formed from the spacer 89, in the rear extension of the two wings 87, 88 and connected transversely, at their respective bases, by a vertical veil 112 intended to come to cooperate with an insulating heel 113 molded with

  the base 72 and arranged transversely on the upper face

  lower 81 of the base, at the rear end

74 of it.

  The electrical connection terminal 27, Figure 3, asso-

  ciée the sub-assembly 30 is intended to be housed between the two sides 109, 110 of the coil carcass 86 This terminal 27, in this case of the caliper screw type, is connected to a conductive part 115, better visible to the

  Figure 3, comprising a first planar branch 116 for-

  view of a threaded central hole 117 intended to receive the terminal 27 and of two lateral projections, only one of which is visible at 118 in FIG. 3, intended to cooperate with two slots 119, 120 formed respectively in the two sides 109, 110 of the coil carcass This

  first branch 116 of the conductive part 115 can be

  follows via a bend at 900, by a second branch 122 intended to go along the coil 91 (see FIGS. 1 and 2) and continuing via a new bend at 90, by a third branch 123 intended to bear partially on the upper end of the tube 90 (see Figures 1 and 2) and having

a portion 124 folded to 90.

  When assembling the electromagnetic trip unit to

  striker 29, in association with the connection terminal

  ment 27, figure 3, the coil 91 is mounted around the tube of the coil carcass 86 and the plunger core 93 is introduced into said tube 90 and is coupled by its tail

  to the striker lever 41, which is then pivotally mounted

  13 - both on the two wings 87, 88 of the coil carcass The return spring 94 and the fixed core 92 are then introduced into the tube 90; the conductive part 115

  associated with connection terminal 27 is made soli-

  of the coil carcass 86 by engagement of the two projections 118 in the two openings 119, 120 of the respective flanks 109, 110 of the coil carcass, the end 91 a of the coil 91 coming to bear against the portion 124

  folded at 90 from the conductive part 115.

  Figure 4 shows this assembly of the electro-

  magnetic with striker 29, in association with terminal 27. After assembly of the plate assembly 59 bimetal thermal trip device 28 on the base 72 and assembly of the electromagnetic trip unit with striker 29 terminal 27, as illustrated in FIG. 4, said electromagnetic trip device with striker

  29 terminal 27 is then mounted on the base 72 by engagement

  on the one hand, of the two wings 87, 88 of the carcass-

  coil 86 on the two risers 78, 79 and, on the other hand, of the web 112 of the coil carcass 86 on the heel 113, by means of cooperating fasteners, such as by

example tenons and mortises.

  FIG. 7 represents the magnetothermal sub-assembly once assembled At this stage, the two ends 91 a and 91 b of the coil 91 (FIG. 3) are electrically connected, for example by welding carried out in a single operation, respectively to the portion 124 of the conductive part 115 and to the part 70 of the plate 59 of

  support of the bimetallic strip, as shown in Figures 1 and 2.

  It should be noted that the height and the location of the insulating fixing pin 83, FIG. 3, are such that once the sub-assembly 30 has been assembled, the end of the 14 - tail 95 of the plunger core 93 in the position of rest either

  resting on pin 83, as shown in Figure 11.

  As shown in FIG. 7, the sub-assembly 30 being assembled, the bimetallic strip 55 and the tube 90 housing the magnetic circuit of the electromagnetic trip device 29 are parallel coplanar, while the percussion arm 96 of the pivoting lever 41 extends laterally one of the large faces of the bimetallic strip 55 so as not to be hampered by the latter; in the rest position, FIG. 7, the percussion arm 96 is moreover situated substantially at the foot of the bimetallic strip 55, extending beyond

  the front end 73 of the base 72.

  With reference to FIGS. 7 and 8, the lower face 128 of the base 72 is provided, in the vicinity of its rear end 74, with two insulating members shaped as hooks, only one of which is visible at 129 in these figures, between which a first is inserted. flat terminal branch 130 (FIG. 8) of the conductive piece in the form of an arm 23 as illustrated in FIG. 9 and bearing, on its

  lower face 131 (FIG. 10), the fixed contact 21.

  The front end 73 of the base 72 is bordered by an insulating cross member 133 provided with hooking members 134 (FIG. 8) cooperating with notches 135 formed in a second flat end branch 136 of the fixed contact carrier arm 23, opposite at the first and folded to

    (see figures 8 and 9) Preferably, the two cro-

  chets 129 and cross member 133 come from molding with the

base 72.

  The fixed contact arm 23 therefore forms an integral part of the subassembly 30 as illustrated in FIG. 8 Once the arm 23 is secured to the subassembly 30, FIG. 8,

  the branch 136 of said arm 23 is electrically connected

  ment, for example by welding, on the end 64 of the

  heater 61 of the bimetal thermal release 28.

-

  In FIG. 8, ribs 140 have been shown along

  gitudinal guide came from molding and formed on the base 72 of the sub-assembly 30 as well as on the wings 87, 88 of the carcass-coil 86; these ribs 140 are provided to slide in longitudinal grooves 142 (FIG. 11) formed in two interpolar walls 11a, 11b of the housing 11 during assembly of the magnetothermal sub-assembly 30 equipped with the fixed contact carrier arm 23

in the housing.

  As can be seen in FIGS. 1 and 2, after assembly of the sub-assembly 30 equipped with the fixed contact carrier arm 23 to

  inside the housing 11, the base 72 of this sub-

  assembly 30 extends longitudinally in a direction perpendicular to the median plane P. From the closed position of the contacts as illustrated in FIG. 1, an electrical overload detected by the bimetallic strip 55 causes a deflection thereof which actuates the trigger bridge 48, which drives a control device, symbolized by the arrow F, which acts on the hook 33 to release it from the strip 38; by this release, the hook 33 pivots clockwise and triggers the lock 31 The opening member 39 descends to strike the pusher 45 which drives the bridge 17 and causes

opening contacts.

  In the case where a short circuit is detected by the electromagnetic trip device with striker 29, the plunger core 93 (FIG. 1) moves by attraction towards the

  fixed core 92 and causes the percussion lever to pivot

  tor 41 which is coupled to it During its pivoting, the lever 41 drives the strip 38 which descends to trigger the lock 31 by releasing the hook 33 vis-à-vis the strip, the released hook 33 pivoting clockwise After triggering lock 31

  whose response time is greater than the per-

  16 - impact of the lever 41, the latter strikes the pusher 45 which drives the bridge 17 and causes the opening of the contacts, this opening being confirmed by descent and application of the opening member 39 on the pusher 45 (FIG. 2) The striker lever assembly 41 plunger core 93 returns to its position in FIG. 1 under the action of the return spring 94, the return of the lever

  striker 41 causing the strip 38 to rise.

17 -

Claims (6)

Claims   1 Electrical device protection switch   tion, comprising in a housing: at least one polar current path established between two electrical connection terminals (26, 27) and provided with a   movable contact bridge (17) with median plane (P), cooperating   rant with fixed contacts (20, 21); a tripping magnetothermal sub-assembly (30) associated with one (27) of the terminals of each pole path and comprising: a thermal tripping device (28) provided with a bimetal strip (55) mounted perpendicularly on a flat conductive support (59 ), at one end thereof, said bimetallic strip (55) being electrically connected to one (21) of the fixed contacts and being capable of controlling   opening of contacts via a trigger mechanism   In response to an overload current, an electromagnetic trip device (29) comprising a coil casing (86) molded from insulating material.   and having a tube (90) around which is wound   lé a control coil (91) whose two ends (91 a, 91 b) are respectively connected to the support (59) bimetallic strip and the associated terminal   (27) by respective pieces of electrical connection cudgel,   a fixed magnetic core (92) and a magnetic core   mobile tick (93) mounted coaxially inside the tube (90) of the bobbin case (86), the mobile core (93) moving by sliding towards the   fixed core (92) in response to a short current   circuit and being returned to the rest position by an elastic return member (94), a striker (41) associated with the movable core (93) and capable of actuating a member for driving the contact bridge in the direction of opening of the contacts due to the displacement of the movable core in response to a short-circuit current, 18 - characterized in that: the magnetothermal sub-assembly (30) further comprises a base (72) of insulating material of generally rectangular shape extending longitudinally in a direction perpendicular to the median plane (P), having an anterior end (73) close to said median plane and serving as a receptacle in which the support (59) carrying the bimetal (55) is fixedly fixed ) according to an arrangement such that the bimetallic strip is located in the vicinity of the anterior end of the base;   the coil housing (86) of the electromagnetic trip unit   tick (29) also has two parallel flat wings   lèles (87, 88) joined transversely by a   flat height rod (89) and vertically mounted, respectively   ment on the two longitudinal upper edges (76, 77) of the base (72), the tube (90) of the coil carcass perpendicularly surmounting said spacer (89) so that said tube (90) and the bimetallic strip (55) are coplanar parallels, one end of the movable core (93) in the rest position projecting from the tube, on the side of the base; the striker (41) of the electromagnetic trip device (29) is a lever coupled to the projecting end of the movable core (93), pivotally mounted on at least one of the two wings (87; 88) of the coil carcass ( 86) and extending laterally to the bimetallic strip (55) in the direction of the median plane (P) and beyond the anterior end (73) of the base (72).   2 electrical switch device according to claim 1, characterized in that the support (59) bimetallic strip is a thin piece of generally rectangular shape having, on the one hand, a first portion (67) having a width equal to that of the base ( 72) and bearing the bimetallic strip (55) and,   on the other hand, a second portion (68) narrowed relative-   ment to the first (67) and extending the latter by means of two transverse recesses (69) 19 -   leaning against two longitudinal risers iso-   lantes (78, 79) which respectively overcome the two longitudinal edges of the base over a height slightly greater than the thickness of the bimetal support, the two wings (87, 88) of the coil-carcass (86) being fixed respectively on these two extensions (78, 79) using   cooperating bodies of mutual commitment.   3 electrical switch device according to claim 1 or 2, characterized in that the two large faces (55 a, 55 b) of the bimetallic strip (55) are located in a plane parallel to the longitudinal direction of the support (59), and that the striker lever (41) has two parallel arms (96, 97) connected transversely by a coupling spacer (98) integral with the projecting end of the movable core (93), one (96) of the two arms being more as long as the other (97) and constituting a percussion arm extending laterally to one of the large faces of the bimetallic strip, these two arms carrying respectively, on their respective external faces, two coaxial pivots (101, 102)   engaged in corresponding orifices (103, 104) pra-   ticked in terminal conformations (105, 106) pre-   views on the two wings (87, 88) of the bobbin case (86), at the base of these, and located substantially at level of the foot of the bimetallic strip.   4 electrical switch device according to claim 3, characterized in that the projecting end of the movable core (93) is formed partially by a tail (95) extending axially the movable core, and that the coupling spacer (98) is shaped like a fork with two teeth between which said tail is inserted (95) of the mobile core.   Electrical device switch according to one claims 3 and 4, -   characterized in that the striker lever (41) is real   made by molding in an insulating material.   6 Electrical switch device according to one of the preceding claims,   characterized in that the base (72) carries, on its face   upper (81), a fixing pin (83) in iso-   lante which is engaged in an opening (84) formed in the support (59) bimetallic strip, and that the height and the location of this fixing pin (83) are such that the projecting end of the movable core rests on said pin when the movable core (93) is in the rest position. 7 Electrical switch device according to one of the preceding claims,   characterized in that the elastic return member (94) of the mobile magnetic core (93) with which the   striker lever (41), is a helical spring inter-   placed between the fixed magnetic core (92) and the core mobile magnetic (93).   8 Electrical device switch according to one of the preceding claims,   characterized in that the coil carcass (86) has   plus two parallel vertical sides (109, 110) extending   managing respectively the two wings (87, 88) thereof from the spacer (89) carrying the tube up   the rear end (74) of the base (72), and between the   which is housed the associated connection terminal (27), these two sides being, at their respective bases, connected transversely by a vertical insulating web (112)   cooperating with an insulating heel (113) mounted transversely   ment on the upper face (81) of the base (72), at the rear end (74) thereof, the veil and the heel comprising cooperating means of mutual engagement. 21 - 9 electrical switch device according to claim 8, characterized in that the electrical connection part, connecting one (91 b) of the ends of the coil (91) to the support (59) bimetallic strip, is constituted by a portion (70) of the support folded at 90 at its end opposite to that carrying the bimetallic strip (55), said end (91 b) of the coil being connected by welding to this portion   folded (70) of the support (59), while the connecting piece   its electrical sound connecting the other end (91 a) of the coil (91) to the associated connection terminal (27) consists of a conductive part (115) comprising a first planar branch (116) associated with said terminal (27) and provided with two projections (118) engaged respectively in two slots (119, 120) formed in the two   sides (109, 110) of the bobbin case (86), this pre-   first branch (116) continuing via a 90 ° elbow, by a second branch (122) running along   the coil and continuing through a new   calf bent at 900, by a third branch (123) partially bearing on the upper end of the tube (90) of the coil-carcass (86) and having a 90-folded portion (124) to which is connected by welding   said other end (91 a) of the coil (91).   Electric device switch according to   one of the preceding claims, wherein   apart, a heater (61) is disposed on the bimetallic strip (55) via an appropriate means of electrical insulation (62)   and, on the other hand, the fixed contact (21) associated electrically   that the bimetallic strip is carried by a conductive arm (23), characterized in that the lower face (128) of the base   (72) is provided, near its posterior end   upper (74), members (129) retaining a first flat end portion (130) of the contact carrier arm (23), and that the front end (73) of the base is bordered by an insulating crosspiece (133) provided with organs   attachment (134) cooperating with notches (135) pra-   22 - ticked in a second flat end portion (136) of said arm (23), opposite the first (130) and folded at, the end (64) of the heater (61) located on the side of the foot of the bimetallic strip (55 ) being connected by welding to this folded part (130) of the contact carrier arm. 11 Electrical device switch according to   one of the preceding claims,   characterized in that the base (72) of the sub-assembly   magnetothermal and the wings (87, 88) of the carcass   coil (86) have guide ribs (140) pre-   views for sliding in grooves (142) formed in   the housing (11) when mounting the magneto- sub-assembly thermal (30) in the housing.