Abstract: Contactor-circuit breaker comprising a control electromagnet and a protection device both capable of acting on mobile contacts in response respectively to a deliberate control and to a detected electrical fault, through a multi-pole device. An electromagnetic tripping device (41) is added onto a contact control mechanism (40). The protection device (30), preferably interchangeable, is connected to the electromagnet (20) through a control line (33B) and to the control mechanism (40) through a trip line (33A) so that it outputs an electrical power supply to the electromagnet on the control line, and in the case of a fault, a trip signal on the trip line. The electromagnet (20) is of the DC type, and the protection device (30) adapts its power supply voltage.

Abstract: A symmetric percussion switching device is provided using a bistable dead point over-run device including an actuator movable between at least two positions and a control member whose movement causes rocking of the actuator from one to other of the two positions, after passing through the dead point, said device further comprising two switches whose actuating members cooperate with the actuator, respectively in the fractions of the stroke thereof adjacent said positions, said switches then being actuated by percussion so that the drawbacks of the conventional switching devices of this kind are avoided in which the pressure of the mobile contact on the fixed contact is substantially zero in the vicinity of the dead point changeover.

Abstract: A device is provided for adjusting the relative position of two parts of the same piece by deforming an intermediate zone connecting these two parts together, by means of a conical screw, and having a tapped bore in which said screw may be screwed, and a cut out which extends from a first edge of the piece to said bore, wherein said intermediate zone further includes at least a second cut out opening into said bore, opposite said first cut out which defines with a second edge of the piece a deformable zone, forming a hinge, offset with respect to said bore.