Abstract: A circuit breaker or cut out provided with a short-circuit indicating device and comprising, for each pole, separable contacts disposed inside a breaking chamber in which an electric arc develops when the contacts become separated. The said short-circuit indicating device is actuated by the gas pressure waves generated by the electric arc in the breaking chambers.

Abstract: A switch in which if the contacts of the switch are lightly stuck together the switch control can still separate them, but if the contacts are firmly stuck together then the switch control cannot be moved to the "off" position which would give a dangerously erroneous indication of the state of the circuit switched. A two arm locking lever is pivotally mounted and has a first stop constituted by a spring into which one of the arms penetrates, and a second stop constituted by a pivot axis of the device.

Abstract: Electrical motor-control device for electrical equipment comprising a drive mechanism including an electric motor and a movement transformation mechanism including an endless screw on which is installed a linearly displaceable nut connected with slight play to an operating member of the electrical equipment. A torque limiter is inserted between the drive mechanism and the movement transformation mechanism. The torque limiter comprises a disk made of rough material integral with a worm screw and has component parts in the form of segments of a ring connected by springs clamping the said disk made of friction material. Applications: remote control of electric circuit-breakers.

Abstract: Tripping devices, more particularly for circuit-breakers, in which a single model tripping device can be transformed by a simple operation, not requiring any dismantling, to obtain either a shunt or undervoltage type of operation. This result can be obtained by changing the relative position of a catch part of the striker, for example by rotation through 180 degrees in relation to a locking part.

Abstract: Locking device of low control power for an electrical device having, between the locked part and the locking control element, a locking assembly having a rolling movement. This locking assembly has a rotating bearing and at least one coaxial disk is installed floating in a yoke connected with the control element. The device is installed more particularly on circuit-breakers for which it ensures accurate controlling, low consumption of power and high reliability.

Abstract: A device is disclosed for mounting an electrical apparatus on standard channel iron comprising a stand portion, a mechanical gripping portion and an electrical contact portion. One edge of the channel iron is engaged by a notch in said stand portion while the opposite edge is engaged between the stand portion and one end of the mechanical gripping portion.The other end of the mechanical gripping portion engages the electrical apparatus and serves to correctly position such apparatus. The electrical contact portion is inserted into a corresponding connector in the electrical apparatus.

Abstract: This device comprises means for detecting, respectively, overcharges, by means of bimetallic strips and short-circuiting, by means of mobile magnetic plates effecting independently from each other the controlling of the switching off of a circuit-breaker for the protection of a circuit. The thermal safety means operate through a mechanical power amplifier comprising a cage with uprights, a rotating catch dependent on the thermal phase-detectors and a plunger transmitting the power of a spring to effect the switching off.