Abstract: A microwave system for locating a mobile element comprises a hollow tube forming a waveguide fed with microwave signals. A location beacon radiates into free space an electromagnetic wave derived from the microwave signals propagating in the waveguide. A location antenna attached to the mobile element receives the electromagnetic wave radiated by the beacon. The location beacon transmits to the antenna a single electric field signal enabling transmission of a location message.

Abstract: A method of assembling a rotor of a steam turbine constituted by disks (2) shrunk onto a shaft, said disks (2) being provided with cavities (4) facing one another and having female pegs (5) disposed in said cavities in one disk (2) and male pegs (6) disposed in the facing cavities (4) of an adjacent disk (2) with each of the disks (2) being shrunk on while disposing the male pegs (6) of said disks into the female pegs (5) of the already shrunk-on adjacent disk, the method being characterized in that spacer means (12) are provided in the female pegs (5) prior to inserting the male pegs (6) in the female pegs (5) so that the male pegs (6) do not come into contact with the female pegs (5), with the spacer means (12) subsequently being removed.

Abstract: A high tension circuit breaker insulated by an arc blasting dielectric gas and comprising, inside a gastight insulating housing: a fixed assembly comprising, in particular, a fixed main contact and a fixed arcing contact; a moving assembly driven by a drive rod and including, in particular, a moving main contact and a moving arcing contact; a blast volume extended by a blast nozzle; a blast piston; and a pair of secondary contacts disposed inside a first volume and intended to generate a secondary arc; wherein the circuit breaker further comprises first means for reducing the risks of unwanted arcs being struck due to the secondary arc, the first means being constituted by a jacket of insulating material extending level with the secondary contacts and in sliding contact with at least a portion of one of the sliding contacts, the jacket having longitudinal grooves adjacent to said secondary contact. The invention is applicable to high tension circuit breakers.

Abstract: The mica-coated adhesive tape comprises at least one sheet of mica paper and at least one backing sheet bonded to the mica paper sheet by means of a binder, the face of the mica paper sheet away from the backing sheet being coated with an adhesive. The adhesive includes an outer coating of a silicone resin.

Abstract: A method of insulating electrical conductors wherein a tape of porous mica paper and of glass felt or cloth or plastic material film is wound round the conductors, wherein the tape is impregnated with a varnish comprising a polymerizable liquid resin, and wherein the impregnated tape is polymerized by heat treatment, the method including the improvement whereby an adhesive powder is initially added to the tape to provide adhesion between the porous mica paper and the glass felt or cloth or the plastic material film, said adhesive powder comprising a polymer having chains of oxazolidone groups containing groups with epoxy terminations, and whereby the polymerizable liquid resin of the varnish essentially contains isocyanate groups which are transformed into isocyanurate groups during polymerization.

Abstract: Device for compacting fluid sludges containing fibrous materials, consisting in slowly stirring the sludge mechanically in the top part of a device, then pressing it moderately in a conical intermediate part of the device and then compacting it in a bottom cylindrical chamber of the device.

Abstract: Cell of low-voltage feed and distribution cellular switchboard, characterized in that it comprises, superimposed one above the other, horizontal metallic casings enclosing switching devices and functional units connected therewith.

Abstract: A connector for testing an electric installation by means of a mobile test connector half which is applied to a fixed test connector half, wherein the mobile half carries pins and push fingers and the fixed half carries sockets and mobile bridge contacts and wherein different distances between co-operating elements of the two halves enable switching operations to be graduated during mating. The invention applies in particular to protection installations.

Abstract: A gas-blast circuit-breaker comprises arcing contacts provided with nozzles of the same diameter, operating means ensuring an original movement of a mobile one of the arcing contacts in the opposite direction to that of the mobile main contact at the opening of the device.

Abstract: The circulation of a low temperature cooling fluid is insured by thermal hon effect in a cryoalternator from within a closed loop circuit containing an inner rotating seal of the "bayonet" type with a very small radial gap. Longitudinal and radial piping within the rotor permits internal circulation of cooling fluid by thermal siphon effect across the "bayonet" type rotating inner seal in the absence of positive circulation by leakage of the coolant across the inner seal radial gap.

Abstract: An electric connection block comprising a base carrying rows of contact pins, wherein this base carries two guide bars made of insulating material, disposed at the ends of the rows of contact pins at a distance from the ends of these rows so as to form wiring channels and also provide a support for the contact plugs or a protective hood.

Abstract: A probe comprises a sealed first tube part terminating at one end in a wiw with an open support extending away from the window and constituting an extension of the tube and carrying a reflection device such that incident light beams passing through the window and onto the reflector are reflected to converge on a measurement point within the open support intermediate of the reflector and window. A light detection device within the sealed tube protects the variations of light on the measurement point.

Abstract: A mechanical support system for printed circuit boards comprising n identical elementary sub-assemblies assembled together, n being any positive integer, each sub-assembly comprising a moulded plastics mounting plate having fixed on one of its surfaces means by sliding cooperating complementary fixing devices on one of the two surfaces of m printed circuit boards so that the m printed circuit boards are fixed side by side on one surface of said mounting plate, the number m lying between one and four. M connectors for the "high-level" signals are each integral respectively with one of the m printed circuit boards, each connector comprising p male connections which plug into p female connections disposed in p of four holes in said mounting plate, said female connections being crimped on output wires, the number p lying between one and four; and a connector for the "low-level" signals snap fitting into anchor clips forming a part of said mounting plate.

Abstract: Integrated nuclear reactor cooled by a liquid metal and constituted by a n tank, which contains a central inner tank containing the core and the hot liquid metal, this inner tank being connected to individual cylindrical chambers each containing a heat exchanger wherein the surfaces of the inner tank and of the cylindrical chambers bulge radially outwards at the level of supply orifices for transferring the hot liquid metal from the inner tank to the heat exchangers and wherein the cylindrical chambers are fixed directly onto the inner tank by neck portions interconnecting the two bulges and providing a path for liquid metal flow.

Abstract: A method for simulating cavitation on models by hydraulic testing with seate micro-bubbles which produce effects similar to those of a prototype operating at the same cavitation number wherein the micro-bubble content of the test liquid around at least a predetermined part of the model is adjustable in number per unit volume and the bubbles are homogeneously distributed thereabout and have dimensions of less than 200 microns.

Abstract: Electrical equipment cell of the air insulated type, comprising a switch which connects a first plug which is live, to a second plug, on either side of a wall, the switch being arranged in an assembly formed by a metallic tank fixed on the wall and by two bell-shaped insulators which are assembled on the metallic tank to receive the first and second plugs respectively. A dielectric screen connected to ground is placed in the first bell-shaped insulator between the contacts of the switch in the open position, so the, in that open position, a person placed on the same side as the second bell-shaped insulator cannot come directly into contact with a live part.

Abstract: A self-resistant light-alloy sectional member for an articulated fitting, ich can be formed by extrusion. The sectional member is characterized in that its cross-section is closed to form an elongated box and in that at least one of the thickness edges of the sectional member has a rigid longitudinal fastening portion, enabling a fitting without any deformation together with a sectional member whose thickness edge is contiguous, provided with a corresponding fastening part running along it.

Abstract: The invention concerns a system of several circuit-breakers controlling separate circuits fed by the same generator and in which the circuit-breakers are provided with a main cut-out chamber (C.sub.1, C.sub.2) in parallel with a series connection of an auxiliary cut-out chamber (E.sub.1, E.sub.2) and of a resistor (R.sub.1, R.sub.2). An operating sequence opens firstly the main chambers (C.sub.2) of all the circuit-breakers of circuits not affected by a failure, then, successively, the main chamber (C.sub.1) and the auxiliary chamber (E.sub.1) of the circuit-breaker of the circuit affected by the failure, and, lastly, closes the main chambers (C.sub.2) of the circuit-breakers of the circuits not affected by the failure.

Abstract: Support grating for electrical equipment boxes having a format which is a multiple of basic elementary dimensions, constituted by a grid formed by cooperating frame members connected together two by two by distance pieces, wherein the frame members comprise periodic transversal cut-away parts constituted by slots or notches, an intermediate cut-away part and a lower port, the sides of the distance pieces comprise protuberances and bosses, for cooperation with the cut-away parts in a rigid assembly which is locked by the bosses in the cut-away parts.

Abstract: This electrical connection relates to an electrical link between a device in a metallic sheath insulated by a gas under pressure and a transformer insulated by a dielectric liquid. The connection comprises a jacket separating the interior volume of the transformer from that of the device and having a frustoconical insulating wall shielding the capacitor bushing and penetrating into the sheath. The insulating wall comprises on the outside of its base a flange having two concentric annular surfaces, one coming into contact with the sheath of the device and defining a junction plane between the interior volume of the device under gas pressure and the atmosphere, the other defining with another part a junction plane between the interior volume of the jacket filled with dielectric liquid and the atmosphere.