Abstract: In a blowing chamber for the arcs appearing between the contacts of an electrical circuit breaking apparatus, e.g. a current limiting apparatus, a blowing loop is constituted by a conductor passing firstly parallel to a movable contact, then externally along a deflector, and finally opposite a massive part of split fins.

Abstract: An electromagnet has a movable core which is locked in rest position by magnetic effect. The movable core cooperates with portions of the magnetic field structure in such a manner as to form three sets of polar surfaces and gaps, of which one situated between the other two, can become saturated when the energizing flux of the winding achieves a certain threshold level. The device is particularly adapted to the actuation of circuit-breakers.

Abstract: A locking device, for a pneumatic sequential control phase module, is constituted by an apparatus adapted to be placed between a base and a housing containing a bi-stable memory, and comprises a selector member receiving cancelling signals and auxiliary signals and the output of which is coupled to a locking input of an inhibitor element placed in series with the channel which transmits the control signals for placing the memory in logic state "1".

Abstract: A cylindrical core is fixed by electrical welding on an arm of a magnetic pot element, the other arms of the pot element being worked to create second polar surfaces at a predetermined distance from the first polar surface of the free end of the core, a magnetizable ring may be fixed on the end in such a manner that the first polar face is situated, after deformation, at a distance from the second polar surfaces.

Abstract: A ferrule for the end of an electric cable is equipped with a removable identification tag. A skirt of the ferrule has a space adapted to receive and to retain a first extremity of a removable tag. An identification zone of the central region of the tag has a profile adapted to permit the placing in position of rings in one direction and to retain the rings against removal in the reverse direction. The ferrule is advantageously used in all electrical installations wherein the identification means of the cables have to be modified and/or are composed of different numbers of characters.

Abstract: A locking device is integrated in a coupling fixed on a ram cylinder for feeding the cylinder with a first fluid. The circulation of that fluid is controlled by a second fluid. The device has (1) a cylindrical member with a tightening head at a first end, a second threaded end to engage in the cylinder, and an intermediate portion between the two ends. The intermediate portion has an axial outlet passage to the cylinder, and a lateral opening terminating at the passage. The device has a coupling head with a through bore, and an internal passage for the first fluid. The bore is shaped to receive the intermediate portion and to couple the opening to the feed passage. The device has movable internal members to modify circulation of the first fluid by moving under the combined effects of a resilient element and the pressure of a second fluid applied to an external locking inlet.

Abstract: A seat has a foot-rest which is adjustable in height in simple manner by reason of the fact that it is pivoted on one of the threaded portions already present either on a column fast to a base or on a support fast to a seat proper.

Abstract: In an auxiliary control device for a pneumatic distributor the improvement is the integration, in a housing of the body of the distributor closed by a stopper, of a commutator sub-assembly placed on each control channel, thereby making it possible to obtain its actuation by a manual handle, by an electromagnet or by a pneumatic actuator, without necessitating the manipulation of delicate elements.

Abstract: A multipolar switch has elements which can be readily assembled and combined for obtaining closing conracts or opening contacts. The body of the apparatus comprises a mounting base and an upper portion, the mounting base receiving an operating member which is movable in translation, the upper portion receiving a cover to close laterally some housings for terminals, some passageways for the retention of contacts, and some breaking chambers.

Abstract: Photo-electric detector comprising a multivibrator with two complementary transistors (T.sub.3 and T.sub.4) of which the base of the first is coupled to the collector of the second by a time constant circuit (R.sub.5 -R.sub.6 -C.sub.1) comprising a resistance (R.sub.5) with negative temperature coefficient. This multivibrator excites an electro-luminescent diode (D.sub.1) which cooperates with a photo-transistor (T.sub.1). After integration, the received signals control a commutator (thyristors Th.sub.1 and Th.sub.2). The circuit is fed by a rectifier bridge with diodes (D.sub.11 to D.sub.14) and formed with two wires.Application to the detection of the presence of an object which blocks the luminous beam emitted by the diode (D.sub.1).

Abstract: A reciprocal locking device for the movements of two push buttons includes a pivoting bolt having the shape of a "T" which oscillates in a plane perpendicular to the directions of displacement of the push buttons and is urged back into a central rest position by its own resilient means.

Abstract: A moving system constituted by a permanent magnet and pole-pieces is accurately guided in axial translational motion within the coil unit of an electromagnet and enclosed within a coil form member, the axis of magnetization being perpendicular to the axis of the coil unit. Air-gap zones are located at both ends of the coil unit and a stationary yoke surrounds the two ends of the coil. Flat portions of the yoke which are parallel to the axis of magnetization each penetrate respectively into one air-gap zone so as to ensure that, at least in one stable position of the moving system, a flat portion of the yoke is in contact with one of the pole-pieces while the other flat portion is in contact with the other pole-piece. Better magnetic coupling between the coil, the air-gaps and the permanent magnet as well as higher operating efficiency are achieved.

Abstract: A cover including switching chambers and housing contact carriers is associated with a base supporting two slides which act by the intermediary of frames either directly on the contacts, or through the intermediary of springs.

Abstract: An electromagnetic contactor is fitted with an electromagnet sensitive to overcurrents, to cause the limitation and cut-off of excess currents.A movable contact bridge is controlled by a spring which holds it against the fixed contacts, and is struck by at least one component which is not connected to it, and which is positioned between it and the armature of the control electromagnet.

Abstract: An electrical contact breaker has a stationary contact, and a movable contact. The movable contact is connected to a terminal by a flexible conductor. For blowing out the arc formed when the contacts separate under load, there is a blowing means including a winding traversed by the current, and pole pieces directing the magnetic field of the winding to the vicinity of the arc gap. The improvement is that the winding is constituted by at least part of the flexible conductor.

Abstract: In a manual switch with thermal and magnetic release, the fixed pivots of a control member, of a latch, and of a transmission member coupled to the contacts, are disposed at the apices of a right-angled triangle, one side bounding the right angle being parallel to the direction of actuation of the control member and to the movement of the contacts, the other side bounding the right angle being placed in the vicinity of the control member.

Abstract: The reading of an identification card with stroke code comprises sweeping of a control area by a laser beam, detection by photo-detectors of light reflected by the card and from the edges thereof, amplification, selection by a chronometer of the useful signal, placing of the signal into a buffer memory, and treatment by a micro-processor and an ordinator for reconstitution of a complete message by means of two successive incomplete sweeps comprising at least one upper or lower security character.

Abstract: A locking device prevents simultaneous displacement of two slides in a common plane, each slide being associated with a respective push button. Each slide is returned by a respective spring, and has a ramp and a notch directed towards a bolt placed between the slides and capable, by actuation of a push button, of moving to a working position to prevent movement of the other push button. The improvement is that the bolt is kept at a central rest position, equidistant from the ramps, by a resilient element. When the bolt is placed in working position by actuation of a first push button, actuation of the second push button causes the bolt to be kept in that position. In the working position, there is complete absence of any contact, between the bolt and the first slide, which might otherwise prevent the return movement of the first slide.

Abstract: A fastening device for a door permits the actuation thereof by a handle, a locking element, or a key of normal kind. A bearing, fast to the wall of the door, can receive either a standard shaft, or a lock cylinder, or again a shaft having a head of particular shape, each of these three members being associated with a same operating handle and a same bolt.

Abstract: A proximity detector comprises a parallel oscillatory circuit the inductance of which is influenced by the metallic element of which it is desired to ascertain the distance, this oscillatory circuit forming part of an oscillator. The oscillator is fed with constant current; current is injected into the oscillatory circuit through a negligibly small resistance; and the output signal is taken off at the output terminals of the oscillator; the device is used to provide an analog signal which is a linear function of distance, in order to classify articles or to measure their speed of approach.