Abstract: An electric connection terminal is provided with a braked screw, in particular for a contactor apparatus. One end of the screw, which projects from the threaded hole in which it is engaged, comes into transverse contact with a resiliently deformable tongue forming part of a portion of the apparatus.

Abstract: The invention provides a supply box for electric ducting able to be mounted at both ends of an electric distribution ducting. This box comprises a movable part with foolproof means which may be moved transversely with respect to the axis of the ducting, between a first position in which the foolproof means cooperate with associated foolproof means on the ducting so as to allow connection of the box to the ducting and a second position making such connection impossible. Marks provided on the movable part make it possible to identify the conductors of the box for each of the two positions.

Abstract: A key attached, for example, to the door of an electrical equipment cubicle is capable of sliding within a passageway so as to cause pivotal displacement of a cam and upward displacement of a push-rod, thus releasing a switch lug. A locking rod forming part of a slide-block which is coupled with the push-rod is capable of moving between a locking position in which an annular channel permits displacement of the key and an unlocking position in which the locking rod is engaged within a key notch. One end of the slide-block projects from the top face of the switching unit head in order to be downwardly displaced by an actuator, whereupon the key can be withdrawn without difficulty or danger.

Abstract: A device is provided for automatically dispensing terminals for electric cables into the receptacle of a reception part. The device includes a tubular body containing the terminals, means for causing a relative movement of the body and of the reception part, and resilient grippers mounted on the body and resiliently urged so as to close a lower orifice of the body and thus retain the terminals. An abutment is provided integral with the reception part for causing the grippers to open when the body and the reception part are brought into contact.

Abstract: A circuit breaker apparatus is provided with remote controlled opening and closing of its circuits and with supports for the mobile and fixed contacts which are adapted so as to promote repulsion forces which produce a limitation of the short circuit currents, in combination with a small mass of the mobile parts, the one supporting a retractable fixed contact being associated by an extension with a slide which is moved by the remote control electromagnet.

Abstract: An electric ducting comprises, inside a metal protection casing in the form of a tubular conduit, a flat support which extends in the longitudinal direction of the casing, over the whole length thereof, and which is formed by extruding an electrically insulating plastic material. The support is provided with parallel grooves arranged side by side, in each of which a current conducting bar is housed flat. For the same flat grooved extruded support, the conducting bars corresponding to different current ratings have the same general U-shape whose legs and base have respectively the same outer height and the same outer width whatever the current rating, only the thickness of the U-shaped bar varying as a function of the current rating.

Abstract: A rotary switch actuating mechanism for at least two control elements is provided, including at least one axial cam, parallel to the axis of rotation, which, in a given position of the rotary switch actuating mechanism, comes into direct engagement with one of the control elements through a transmission lever actuated by the cam in another position of the rotary switch actuating mechanism for acting on another control element.

Abstract: A proximity detector is provided with an oscillating circuit generating cyclically an unsustained pseudo-oscillation. The detector includes a processing circuit having a comparator which compares the relaxation voltage of the oscillating circuit with a predetermined threshold and a logic circuit which generates control pulses with low duty ratio for a switch in series with the oscillating circuit and also an output signal as a function of the measurement pulses delivered by the comparator. The closure duration of the switch is substantially equal to half the pseudo-oscillation period.

Abstract: In an electric coupling device for covering two ranges of current intensities with one and the same casing, each terminal has a stationary conductive strip (28) and a movable yoke (48) which are mounted within a housing of the casing so as to clamp a conductor (51). The housing can also accommodate a more bulky cage-type connector. In order to guide the movable components (42, 48) of the yoke connector and the conductor (51) at the time of introduction, an adapter (52) is fitted within the housing. The adapter surrounds the yoke connector so as to close the clamping zone laterally between the conductive strip (28) and the yoke (48) and to prevent rotation of the yoke. An abutment face (61) limits the relative spacing of the yoke (48) and the strip (28) while a well (59) guides the screw head. A masking panel (71) of the adapter limits the size of the opening (17) to the strict minimum required for introduction of the conductor.

Abstract: A circuit and apparatus are provided for the protected supply of a load using static and electromechanical switches. A switch apparatus having current limiting properties is opened by remote control means after a very short delay, following disabling of a static switch system placed in series therewith and connected in parallel across a voltage limiting component.

Abstract: Converter, particularly frequency-converter, with pulse width modulation. The losses of the converter are reduced by providing in one of the leads (17, 18) connecting the direct voltage source (12) to the inverter (15) an inductance (L) as an aid to the conduction of all static switches (T1-T6); in parallel to the arms (B1-B3) of the inverter, a transfer capacitor (C.sub.L) in series with a transfer diode (D.sub.L) to receive the inductance energy during the blocking of the static switches; a resistance (R.sub.L) for the discharge of the transfer capacitor, connected to the lead (17, 18) connecting the direct voltage source (12) to the inverter (15).

Abstract: A device and method are provided for the redundant control of a power controlled device (R). The redundant control device comprises two programmable controllers (A.sub.1, A.sub.2) adapted for elaborating a control order. These two programmable controllers (A.sub.1, A.sub.2) are equipped with two respective logic circuits designed so as to apply to two outputs (s.sub.1, s.sub.2) two logic signals (S.sub.1, S.sub.2) whose combination using the EXCLUSIVE OR function is the image of the control order. The power device (R) is then controlled by a control member (O) connected by its two inputs, to said two outputs (s.sub.1, s.sub.2) and performing the logic EXCLUSIVE OR function of the signals (S.sub.1, S.sub.2) delivered by these two outputs. With this device, independently of the breakdown state of one of the two control circuits, the state of the controlled device always corresponds to the control order.

Abstract: A circuit is provided for processing a pseudo-oscillatory signal generated by an oscillating circuit including a comparator and a logic circuit. The oscillating circuit has a first terminal connected to an energy source by a first switch and a second terminal referenced alternately to a potential substantially equal to half the high potential of the power supply and to the low potential of the power supply. This alternate reference is determined by a second switch controlled synchronously with the first switch by the logic circuit.

Abstract: A switching and/or signalling apparatus is provided including a case formed of a base and a lid in which at least one manually or remote controlled switching unit is housed, particularly a contactor with an electro-thermal relay which is associated therewith, and the control members provided on the lid for actuating the switching unit, wherein, between the control unit and the side walls of the case, there is provided at least one fixed support element for at least one control element associated with the switching unit and actuated by the corresponding control member.

Abstract: The device for rendering contactors electrically and mechanically inoperative in accordance with the invention comprises a flat modular case, two movement take-offs adapted for coupling respectively with the mobile assemblies of two contactors, two mobile elements providing reciprocal inoperativeness, driven respectively by said movement take-offs and two switch devices whose mobile contact elements are respectively actuated by the mobile elements providing inoperativeness. These two switch devices are mounted in two through current lines directed transversely with respect to the sidewalls of the case.

Abstract: A detector head can assume two positions selectively on a mount which is in turn fixed with adjustable orientation on the cover of the casing. Two and the same perpendicular channels in the head, and two and the same perpendicular tapped holes in the mount are occupied by two screws fixing the head on the mount in the two positions of the head on the mount. The channels extend along two edges of the head without obstructing the space available inside. They converge towards an edge along which the mount extends in a very compact form. The two perpendicular screws provide a strong and compact connection between the head and the mount.

Abstract: The invention provides a device for controlling an electromagnet having a coil (L) connected to an AC supply source, through a switch (T) controlled by a control circuit.This control circuit comprising a member for determining the voltage zeros of the AC current (R.sub.4, C.sub.3, D.sub.3, IN.sub.1, C.sub.4, R.sub.6, IN.sub.2), a delay element adjusted for obtaining a delay time which corresponds to the privileged control angle of the electromagnet and a switch-over device (FL) controlled by the delay element for delivering to the switch (T), following a control order, a control signal delayed by said delay time. The invention applies particularly to contactors and electromagnetic valves.

Abstract: An input/output device monitors the transmission of information between a processor of a programmable controller and sensors and actuators of a process to be controlled. This device includes electronic circuits adapted for calculating the parities of the digital words which pass therethrough, these parities being compared with corresponding parities calculated by the processor which thereafter invalidates the words having two different parities.

Abstract: An inductive device is provided for the rapid data exchange between two data carriers, more particularly between a fixed station and a movable carrier, usable in industrial process automation systems an automatic tuning circuit is provided for maintaining the frequency of the resonating circuit of the inductive device at a nominal value; the tuning circuit includes a comparator means which compares a signal representative of the frequency of the circuit with a reference value. A tuning means receives from the comparator an error signal so as to cause the frequency of the resonating circuit to return to its nominal value.

Abstract: Disclosed is a method for the direct bonding of a copper sheet to a substrate made of an electrically insulating material, with the heating of the copper/substrate set in order to obtain a eutectic mixture. The method according to the invention consists in cleaning the copper to eliminate traces of oxidation on its surface before placing said copper on the substrate, in heating the copper/substrate set under a neutral atmosphere until a temperature greater than the temperature for the formation of the eutectic mixture is reached, and in applying the oxidating reactive gas only after the temperature greater than the temperature for the formation of the eutectic mixture is reached, in such a way that this temperature is reached before any oxidation of the surface of the copper.