Abstract: A polarized electromagnet with bi or monostable operation is provided in which two flux channelling pieces of rectangular shape are disposed one in the other and are magnetically associated by means of permanent magnets, whose axes, parallel to that of the coil, pass substantially through the carcase of said coil, inside which slides a core provided with two plates when the operation is to be bistable.

Abstract: A DC current electromagnet is provided developing a high pulling force with reduced current consumption. This electromagnet has the form of a cylindrical pot and comprises a mobile armature which slides along a yoke piece through a closure air gap --e, S--, whose reluctance is low with respect to the reluctance of the working air gap --E, s-- when this latter is open and substantially constant during movement.

Abstract: A DC power control circuit with status report and protection against overloads and short circuits is provided in which the output stage comprises at least one output amplifier whose input receives an external control logic signal and whose output is connected, through a current limiter, to the output of the circuit. The control circuit further comprises a voltage threshold detector which compares the residue voltage of the output stage with a threshold voltage corresponding to a maximum acceptable difference and which delivers a report signal representative of the sign of the difference between the residue voltage and the threshold voltage.

Abstract: A variable composition switching device which comprises one basic modular component incorporating at least one controllable switching device, one direct switching control modular component and/or one indirect switching control modular component. This indirect switching control component acts on the basic modular component through a potential energy accumulation tripping device.

Abstract: An electronic card holding cell-like structure formed by the assembly of at least two modular electronic card supporting and protecting cells together, each of these modular cells having a blank and perpendicularly thereto, from its rear edge portion and its two side edge portions, respectively a bottom and two lateral sides, in which are formed two respective lateral slides parallel to the flat portion. The two longitudinal edge portions of each of the lateral sides of the modular cell being provided with respectively complementary fixing means so as to allow fixing of two adjacent modular cells.

Abstract: A modular cell for supporting and protecting electronic cards formed by a flat element or blank having two parallel lateral edge portions, a front edge portion and a rear edge portion and, extending perpendicularly to said blank, from its rear edge portion and from its two lateral edge portions, respectively a bottom and two lateral sides having card guide means forming two respective lateral slides parallel to the blank. This cell being further provided with fixing means for holding the card in position with respect to said blank, once the card has reached its position of use inside the cell, after sliding in said slides.

Abstract: A power connecting terminal for a printed circuit board comprises a clamping screw inserted in a flat fixed part which is folded back on itself and which has three parallel lugs fitting into metallized holes and separated by edges. This part may be fastened to the board by soldering the edges to a conducting layer, and to the lugs by soldering with the metallized holes. The terminal is capable of withstanding high tightening forces.

Abstract: A loss proof general purpose terminal for forming electric connections by clamping between two conducting elements, comprising a connection area disposed at the bottom of a recess formed in an insulating material body and having a central tapped bore, a clamping screw for screwing into said bore and a stirrup portion mounted so as not to be lost under the head of the screw. It further comprises, guided inside the recess a stirrup-plate having a threaded bore through which said screw is screwed. This stirrup-plate comprises two diametrically opposite lateral projections extending at right angles and whose ends are bent back inwardly and extend partially into the passage zone of said stirrup portion.

Abstract: A three-state polarized electromagnet comprises a stationary system (1) surrounded by a coil (5) and a moving system (7). Each system consists of a permanent magnet (2; 14) fitted with pole pieces (3, 4; 12, 13). The ends of the pole pieces are bent-back towards each other in order to define four air-gaps (E1 to E4) for permitting displacement of the moving system (7) between two end positions. One end portion of a pole piece forms part of only one air-gap and the air-gap faces are joined to pole faces of permanent magnets having the same polarity in order to reduce to zero the fluxes within the air-gaps which are closed when no excitation is applied and in order to permit a return to a stable central position.

Abstract: A high speed current maximum tripping device, comprising a fixed core and a mobile core with complementary shapes and disposed in the same plane while defining an air gap therebetween. The fixed and mobile cores are obtained by flat stamping and have complementary profiles of a generally curvilinear shape with sides whose slope with respect to the main axis of the projecting core increases progressively from the nose towards the body.

Abstract: The electromagnet comprises the yokes (31, 32a) which are moveable in relation to an armature (21a) and a winding (25) surrounding a part of the magnetic circuit, this armature (21a) comprised of a magnet (22a) fitted with two pole pieces (23a, 24a) projecting past both extremities of this magnet, at least one of the said pole pieces having its extremities bent at right angles in order to define the air gap inducing counter forces following a direction perpendicular to the axis of the permanent magnet (22a).A second armature (21b) identical to the first (21a) is located parallel to and facing the first. Two yokes (31; 32a, 32b) join the air gap zones of the two armatures located facing each other in such a way that the magnetic circuit constitutes a sequence of armature and yoke forming a rectangle. Two windings (25, 28) are located on opposite sides of the above-mentioned rectangle.Application primarily in the construction of electromagnets of low inertia, small volume and low leakage flux.

Abstract: The control circuit according to the invention consists firstly of two control terminals (S.sub.1, S.sub.2) to which drive pulses of at least two different types can be applied, i.e. a first pulse type (S) designed to obtain one position (S) of the solenoid and which present a first level of amplitude, and a second pulse type (R) designed to obtain a second position (R) of the solenoid and which present a second level of amplitude different from that of the pulses (S) of the first type and with the same polarity and secondly, a discrimination circuit (R.sub.1, R.sub.2, A) for the pulses (R, S) of these two types according to their level of amplitude, this discrimination circuit (R.sub.1, R.sub.2, A) being connected to a switching circuit (CS, CS', CR, CR') controlling supply of the solenoid (B). The invention is also applicable to solenoids comprising one coil as well as to solenoids having two separate coils or with a common intermediate connecting point.

Abstract: An integrated self-firing thyristor structure which comprises a main thyristor having a first emitter portion, a main base, a first inhibition base provided with a bore, a second emitter portion, an auxiliary thyristor using said first emitter portion and said main base and having a second inhibition base which extends in said bore and is insulated therefrom, and a third emitter portion, a conductive element connecting said first inhibition base to said third emitter portion and switching means connected between said conductive element, said second emitter portion and said second inhibition base so that the self-switching-on function of the integrated thyristor can be inhibited by said switching means.

Abstract: A monostable polarized relay which has two permanent magnets and does not require any resilient restoring force is reduced to a minimum overall size while permitting a high current-carrying capacity of the relay contact. To this end, a flexible contact-strip is subdivided into two sinuous branches which extend in two different regions of the available space within the relay housing. The contact-carrying end of the strip is inserted in an actuating fork which is rigidly fixed to the moving armature and the other end of the strip is anchored to the base of the relay.

Abstract: A combined isolating switch-circuit breaker comprising at least one fixed contact breaking element, one fixed isolating contact element and at least one mobile assembly comprising a mobile contact breaking element electrically connected to a mobile isolating contact element. The arrangement of said mobile contact elements with respect to said fixed contact elements is provided so that, during closure of the combined device, the fixed isolating contact is closed before the electric contact is established between the fixed contact breaking element and the mobile contact breaking element and, conversely opening of the breaking contact is provided before opening of the isolating contact occurs.

Abstract: A container (1) for an auto-control possesses a bottom (2) carrying a printed circuit (3), to which connecting blocks (8) are fastened. The bottom (2) extends between two flank walls (34). The other two walls of the container (1) are latticed and consist of slides (11) intended for guiding the input/output cards towards the blocks (8). The bottom (2) also incorporates an inner wall (13) interposed between the circuit (3) and the interior of the container. The blocks (8) are laid against the periphery of apertures (14) and are accessible via these from the interior of the container (1). Each slide (11) carries a stud (31) engaged in a perforation (24) in one of the blocks (8). Adjacent the wall (13), the slides (11) have a certain play (J) between them. At their other end, they abut against one another. The invention is used to allow the slides to follow, for example, movements of thermal origin experienced by the circuit (3), without however fastening the slides to the latter.

Abstract: The rotating or linear stepping motor comprises a permanent magnet equipped with pole pieces the ends of which define gaps.This motor comprises a second permanent magnet so that its primary has a magnet (6) equipped with pole pieces (4) and (7) and its secondary has a magnet (9) equipped with pole pieces (5) and (10). Each magnet (6), (9) is subjected to the field of a winding (2) which is perpendicular to the direction of its magnetization and directed towards one or the other of the ends of each pole piece so as to create a transfer of the flux of the magnets. In the case of a rotating motor, the winding (2) preferably has a toroidal shape with circular cross-section and the path of the flux around a circular section of winding also has an approximately circular shape so that each part of the winding (2) is surrounded by iron of minimum length. Each gap is flanked by two magnets and the residual holding torque is strengthened. This torque can be cancelled by a releasing pulse.

Abstract: Modular apparatus for coded interconnection between electronic cards and a printed circuit board, eliminates the risks of incorrect connection between a housing (9) containing a program card (8) and the bottom (1) of an auto-control container containing the printed circuit (4) and having rows of connections (6) for receiving male connections (7) arranged on one of the edges of the card (8) to connect them to the circuit (4). For each housing (9) and each row (6), the device comprises four rotary members (13, 16). The members (13) each carry a finger (17) which can engage in an orifice (18) in the members (16) when the angular positions between the members (13, 16) correspond to one another. The invention is used to make it easier to code the elements of a programmable auto-control.

Abstract: A contact that has two fixed contact elements and a mobile contact bridge actuated by a switching assembly and is urged by a pole spring. The connection between the mobile contact bridge and switching assembly is provided by a magnetic compensator connected to the switching assembly by means of a magnetic coupling device adapted so that, when the compensating forces rise above a given threshold, the magnetic compensator is disengaged from the switching assembly and becomes inoperative.

Abstract: A device for connecting an electric conductor mounted within a housing is provided, on a first lateral face, with an opening for the introduction of the electric conductor and, on a further lateral face perpendicular to the first one, with another opening for the introduction of a tool. Said device comprises a contact member secured within the housing and means for resilient jamming of the electric conductor against the contact member. The means for resiliently jamming the conductor consist of a single member comprising a presser tongue contained in a plane making an acute angle with the plane of the contact member and a portion for transmitting the resilient force created by resilient means which bear on the face of the contact member opposite to that on which the tongue bears. The portion is contained in a plane adjacent to the contact member at right angles with the plane of the contact member and parallel to the direction of introduction of the wire.