Abstract: A method and device of the pulse-compression radar or sonar type which makes it possible to determine the speed of a moving object is provided with a transmitter system, a receiver system, and a signal processing system. The transmitter system is capable of transmitting two associated pulses, one of which is modulated with an increasing variation law and the other of which is modulated with a decreasing variation law. The signal processing system includes two correlators, an adder, a subtractor, and a computer.

Abstract: A process and apparatus are provided for checking the electric continuity of an electrically conducting material device, in which a current is injected between two points of said device and the resulting voltage between these points is measured. The invention is remarkable in that said current is an AC current and its pulsation is chosen sufficiently large so that the impedance between the two points, measured by the ratio of said voltage and of the current, may be considered as being equal to the product of the inductance of the path of the current between said points multiplied by said pulsation.

Abstract: A process and a device are provided for the quantitative radiation absorption measurement of a work piece using an electromagnetic radiation beam. In accordance with the invention, the work piece is scanned by sections and each section scanned is fictitiously divided into a plurality of zones, for each of which the value of the coefficient of attenuation per unit of length of said beam is determined.

Abstract: The blade of composite materials and its manufacturing process according to the invention are such that the spar includes at least one bundle (10a, 10b) extending longitudinally in the shell (4), between the fillings of the leading edge (12a) and the trailing edge (12c) and which adheres directly to the laminated pressure face and suction face coverings, (4a, 4b) of the rigid shell (4).Beyond the blade footing (3), the spar is shaped to form a root loop flexible in torsion (8) and passing round an attaching socket (9) on the hub.Application to variable pitch multi-blade propellers for the streamlined tail rotors of helicopters.

Abstract: This invention relates to a simulator for an installation for locating and guiding a self-propelled, remote-controlled aerial body in motion, wherein said simulator comprises means for simulating the radar, the aerial body in motion and the remote-control emitter, and it may be connected, in place of said radar and said remote-control emitter respectively, at the input of the radar control panel and at the output of the remote-control panel, by means of a switching system.

Abstract: A process for forming a piece (6) implantable in an organism, more especially for the percutaneous passage of cables or pipes (8).According to the invention, the piece (6) is formed from a felt of carbon fibers coated with a pyrocarbon matrix.

Abstract: A part made of a resin-containing composite material, also having at least one insert made of a different material, is hardened by electron beam radiation in zones having a surface mass at the most equal to 4 g/cm.sup.2 and by X-radiation in zones having a surface mass above 4 g/cm.sup.2. The X-radiation, in doses up to 10 Mrad, is produced by action of the electron beam on a target placed between the part and the electron beam.

Abstract: A molding cavity wall (10) is made in a plurality of parts of a cheap material having a high thermal conductivity, for example a thin metal sheet (10), at least one heating device (11) is applied on the wall in direct thermal exchange relation to the external surface of the wall (10), and a thermal insulator constituted by a foam (12) of highly rigid resin is applied to the wall (10) in uniform pressure transmitting relation to said wall.

Abstract: A method is provided of temporary assembling by soldering of peel off plates through soldering material and a flexible junction element for a mechanical release device to release two parts temporarily fixed edgewise by peeling off the flexible element and the soldering material. There is provided on the plates and flexible junction element reserve areas without any adherence to the soldering material, and preferably at the limits of said reserved areas a recess for removing any excess of soldering material, and the melting solder material is put under load for distributing it between the plates and the flexible junction element. A so obtained assembly can be applied particularly to obtain automatic opening of containers in particular in space for spreading out solar panels.

Abstract: This invention relates to a tool support, particularly for a robot, of the type comprising two parts connected together by an assembly of elastic plates which, at rest, are disposed tangentially to a circle concentric to a reference axis of said robot with which the axis of the tool merges, and which, when working, enable that part of said support which bears the tool to move with respect to said reference axis, wherein each of said plates is connected to one of said parts of the tool support via a swivel joint assembly or the like and to the other of said parts via an articulation whose axis is at right angles to said reference axis. The invention is more particularly applicable to automatic machining with displacement of the tool parallel to itself.

Abstract: This invention relates to a mechanism for automatically actuating a rescue device upon opening of a panel obturating an exit and bearing said rescue device, mechanism comprising a control bar connected to said rescue device and adapted, under the action of a voluntary actuating member, to be rendered fast either with said panel or with the periphery of said exit, with the result that opening of said panel does not bring about, or brings about, respectively, actuation of said rescue device via said control bar. According to the invention, this mechanism is characterized in that said control bar is fast in displacement with a mobile system controlled by said voluntary actuating member in order to subject said bar to a movement of translation parallel to itself, of direction at least substantially at right angles to said panel. The invention is more particularly applicable to the automatic control of escape slides, slide/rafts or the like in the event of an emergency.

Abstract: This invention relates to a process for connecting an element to the end of a tube of composite material, wherein, at least at said end, said tube presents an annular cross-section of which the outer and inner contours are each constituted by a circular line or with interference of shapes, for example polygonal, and said element comprises a recess defined between two spaced apart coaxial prismatic or cylindrical walls, the annular section of said recess corresponding to that of said end so that the latter may be fitted in said element with interposition of an intercalated sleeve made of high-resistance fibers impregnated with resin or polymerizable elastomer. The invention is more particularly applicable to the production of torque tubes or power transmission shafts made of composite material.

Abstract: A system for producing electrical wiring parts in which every conductor connects two connection devices, each connecting point of at least one of which is transparent, and which comprises a computer associated to a bulk memory storing itmes of information relative to the identification of the conductor and to the addresses of its ends. The system comprises at least one work station for an operator, which work station is connected with the computer and bulk memory, and comprises data input means and an assembly of selectively controllable light points disposed correspondingly to the transparent connection points of the connection device.

Abstract: A system for putting two contiguous enclosures (2,3) disposed on one side of a common wall (4) into individual communication with the outside. According to the invention, a coaxial coupling part (1) is provided enabling two connections to be made. The coupling is suitable for use in heart prostheses.

Abstract: Method for heating the reducing gas of a blast furnace by means of a plasma generator. The reducing gas flows through a pipe into which issues the nozzle of the plasma generator. The pipe leads towards a tuyere of injection into the blast furnace, and the axis of said nozzle converging towards that of the pipe. The method is characterized in that the acute angle A between the axis of the nozzle and the axis of the pipe is at the most equal to 50.degree., in that the distance 1 separating the point of intersection of the axis of the pipe with the axis of the nozzle from the center of the outlet orifice of the nozzle is at the most equal toD/2sinA,D being the inner diameter of the reducing gas inlet pipe, and in that the ratioD/d,in which d is the inner diameter of the outlet orifice of the nozzle is at least equal to 1.5. The object of the method is to eliminate wear of the reducing gas pipe by means of the jet of plasma.

Abstract: The invention concerns the production of three-dimensional thread packages. Vertical rods (11) are maintained in a stationary arranged network by engagement through perforated plates (12,13). A thread (10) is deposited from above this network by a shuttle (9) in a sinuous path between upper end portions of the rods (11). The layers of thread thus formed in succession, supported by the perforated plate (12) which undergoes a descending movement, are compacted by a perforated plate (7) which is lowered upon the finishing of each layer. A lacing arrangement (35) replaces the rods (11) by threads after the thread laying phase.

Abstract: The invention relates to a device incorporating retractable stops for limiting the flappings of the blades of the main rotor of a rotorcraft. Each lower stop comprises a convex roller presenting a convex stop surface and bearing a weight at the end of an arm. By its convex roller, the lower stop is mounted to pivot about the pin for retaining the blade on the hub. On the ground, the bearing member is in contact with a lower bearing surface fast with the blade at the level of the pitch control lever, in order to limit the downward flappings of the blade. The lower stop pivots about the pin above the lower plate. The upward flappings of the blade may be limited by upper stops disposed substantially symmetrically below the upper plate. A second lower weight, returned by a spring, and engaging by a nose-shaped element in a notch in the rear of the bearing surface, acts as upper stop. The invention is more particularly applicable to equipping helicopters.

Abstract: A quick connect system for connecting a blood vessel and a cardiac prosthesis comprises two cooperating annular connectors, one fixed to the prosthesis and the other to the end of the blood vessel. A removable obturating plate is mounted on the connector fixed to the cardiac prosthesis so as to be able to slide in a plane at least substantially orthogonal to the axis of the connector, this plate comprising an outward extension enabling it to be gripped, when it is in its obturating position. The invention is particularly useful in heart surgery.

Abstract: This invention relates to a machining device incorporating a blank-press connected to the tool and to a blank-press for such a device, wherein said blank-press is provided with an annular chamber surrounding said tool and obturated opposite the workpiece by a flat face traversed by a plurality of orifices; said annular chamber comprises means for connection to a source of fluid under pressure; and said fluid emerging from the annular chamber through said orifices between the flat face of the workpiece and the flat face of the annular chamber creates a fluid film for lift. The invention is more particularly applicable to the trimming of stacks of sheet metal plates.

Abstract: A variable pitch multi-blade propeller suitable for use on a helicopter is constructed of a foam preform joined with a fibrous spar enclosed in resin-impregnated foils and fitted with a metal leading edge. Various components are assembled in a mold and the resins, then cured. The structure may further include a reinforcing yoke of carbon fiber fabrics preimpregnated with a polymerizable synthetic resin. The process may further include a heat treating step to effect polymerization.