Abstract: A needle for interlacing yarns, strands or the like in a multi-directional woven structure composed of a shank bent to form an elastic blade. The end of the blade is normally resiliently applied against the shank, so as to form the eye of the needle which is opened by moving the blade away from the shank by means of an opener. The yarn is thus inserted and the eye is allowed to close while the needle is moved.

Abstract: Machine intended for cutting out transversely, along a straight or broken, oblique or right-angled cutting line, a band material adapted to be fed parallel to its length.This machine has in combination, a device to unwind the band at constant linear speed from a reel and a second device to, firstly, advance the unwound band at constant linear speed from a fixed plane support which extends at least from the second device into proximity of the cutting system, and secondly, permit an edge of the band to be applied against a lateral edge guide. Use of this machine includes cutting of pieces from flexible compound material.

Abstract: A hub plate and helicopter rotor incorporating same made of a composite material and comprising a laminated disc constituted by layers of fiber cloth having high mechanical strength. A frame of the disc is made of aligned layers of the cloth with the weft or warp of the cloth extending radially in the direction corresponding to the direction of centrifugal force acting on the plate when in use. The aligned layers are positioned at the core of the structure and at least at the surface of the structure in the peripheral portion of the disc. The disc is enclosed by a belt of parallel threads consisting of fibers having high mechanical strength fitted on radially outwardly projecting parts of the disc in recesses formed in the outer edge of the parts, the recesses being open to the exterior.

Abstract: The invention relates to a safety device for an aircraft door opening outwardly by a preliminary movement enabling stops borne by said door to be disengaged from stops borne by the frame thereof, after which complete opening of the door is obtained by a simple thrust or pull, wherein said safety device comprises at least one mobile lock and one stop, one mounted on the door and the other on the frame thereof and adapted to cooperate with one another to interrupt the prior movement of disengagement of the stops on the door and the stops on the frame, and said mobile lock is controlled by manometric means receiving the pressures inside and outside the aircraft.

Abstract: A process and apparatus for stacking layers of composite material on moulding equipment comprises a transfer band on which each of two opposed working sections has a surface suction device to hold on it a layer that has been placed in a precise position in register with an outline, projected onto the transfer band by means of neon tubes and a frosted glass plate in a first working station. The band transfers the layer to a second working station where the layer is isolated in a sealed enclosure by means of an inflatable joint carried by a frame facing a peripheral ridge surrounding the moulding equipment. Reduced pressure is produced in the enclosure via a reduced pressure outlet causing the transfer band to be displaced towards the moulding equipment and draping the layer over the latter.

Abstract: There is provided a process for providing a metal connector fixed to a pipe of composite material and a pipe thus made.A pipe carries at one of its extremities a metal connector, and a first film of elastomer being interposed between the two and adhering to each of them an adhesive. At the level of this extremity, the pipe also carries a metal casing which is held solidly on the connector by a band and a second film of an elastomer which is interposed between the casing and the pipe and adheres by means of an adhesive to each of them.The pipes according to the invention are suitable for use in offshore oil exploration.

Abstract: The invention relates to a reconnaissance system comprising an air-borne vehicle capable of moving above a territory to be surveyed by rotating about its longitudinal axis, and means for taking images disposed on board the vehicle to observe said territory by a helicoidal scanning in relation with the rotation of the vehicle, wherein the vehicle is of the self-propelled missile type and the sensitive members are formed by at least one linear assembly of photosensitive elements disposed parallel to the longitudinal axis of the missile to give at each line an image of an elementary strip of territory, which scans a strip of territory upon each revolution of the missile, the total image of the territory being formed by the plurality of images of the successive strips.

Abstract: The invention relates to a mounting device for supporting a component, especially a mirror or an antenna reflector in a spacecraft. The device comprises a combination of flexible blades disposed between the support, and between the intermediate piece and the component.

Abstract: A steering system for a missile provided with aerodynamic surfaces such as fins comprises a gas generator and lateral nozzles through which the gas generated by the gas generator emerges. The nozzles are arranged to lie between adjacent pairs of the aerodynamic surfaces, to project beyond the fuselage of the missile and to have an oblong cross-section, the largest dimension of which lies substantially parallel to the longitudinal axis of the missile. The gas flow through the nozzles is controlled by complete or partial closing of the nozzles. The shape and placement of the nozzles minimizes changes in the aerodynamic characteristics of the missile caused by interaction between the gas jets emerging from the nozzles and the flow of air over the aerodynamic surface of the missile.

Abstract: An automatic mounting appliance for assembling clamp pins, screws, nuts and the like is adapted to be installed on a machine driven into rotation by a motor. The appliance comprises coaxial elements i.e. a holding member for receiving a portion of the pins, screws, or nuts terminated at one end by a socket, a gripping member having angular shift with respect to the holding member and terminated at one end by a socket axially adjacent to the first mentioned socket, both sockets being in coincidence only in one of two end positions, a rotary member driven by the motor, a stationary member, and a driving member radially interposed between the rotary and gripping members to frictionally drive the gripping member from the rotary member, whereby the angular shift permits locking or unlocking of the pins, screws, or nuts depending on the direction of rotation.

Abstract: Device for maintaining a detonating cord against a transparent aircraft canopy member which is of the type comprising a closed sheath within which is placed the cord. The device also has an outer envelope, whereof a first part, surrounded by the closed sheath, is maintained against the transparent member and whereof a second part is fixed to a structural component of the aircraft cockpit.

Abstract: A holding and releasing system provides temporary connection between a movable and a stationary part which are to be separated during the specific use thereof. It comprises a supporting foot connected to the fixed part, a rocker link hinged to said foot, a movable support hinged to said link, a sheaving bracket hinged to another end of said link; said link occupying two positions, i.e. a locking one in which the movable support bears on one face of the movable part, while the free end of the sheaving bracket bears on the other face of said movable part, to block the latter in a precise position, and a release position in which the movable support and said bracket are in a retracted position thereby releasing the movable part. The system is used especially in the space vehicle domain.

Abstract: The invention relates to a control column (2) for a copilot of an aircraft, coupled for control of roll and pitch by a linkage (5) to the pilot's control column (1). This linkage comprises two parallel rods (6,7) pivoted on the one hand to the column (1) and on the other hand to a member (13) connected to the column (2) by a double universal joint (14, 17). When operative, the column (2) is locked to the member (13) by a lock bolt (19). This control column can be put out of action by releasing the said bolt and can be secured by hooking to a fixed point, in which case the double universal joint (14, 17) ensures its disconnection from the column (1) and thus prevents any misoperation.

Abstract: A suspension for a set of two wheels of a vehicle comprises two arms oscillating about an axis X--X transverse with respect to the vehicle and each bearing a wheel, and dampers associated with said arms to counteract and damp the vertical movements of the wheels. The dampers comprise an assembly of two concentric tubes made of composite fiber-synthetic resin material coaxial to the transverse axis X--X of oscillation of the arms. The ends of the tubes are connected to each other and with one of the arms, and the outer tube of the assembly of tubes is connected to the chassis of the vehicle at at least one point close to the middle of its length.

Abstract: Method and device to determine the threshold of resistance of an electric or electronic equipment to an external electromagnetic aggression, by simulating such aggression, the said equipment comprising at least two units joined together by way of a connection comprising shielded conductors.The invention is remarkable in that at least one passive injection element is inserted in the said connection, which element presents a known transfer impedance and comprises an external casing, inner conductors, and end connectors, so that said injection element ensures a continuity of the normal electric connections between the said units and that its external casing is electrically connected to the shielding of the said connection, in that the said equipment equipped with its injection element is subjected to the action of an electromagnetic testing field.

Abstract: Screw clamp pin extractor for clamping pins of the type having a body fastened to a spreader lying between two tongs secured to a screw, and a nut acting against a spring. The extractor comprises a pneumatic motor, a nose portion engaging the clamp pin and carrying a sleeve brought into contact with an assembly of sheets, said extractor comprising moreover an internal mechanical system. When the motor rotates for unscrewing pins the device is locked on the pin and the nut of same can be unscrewed, and thereafter, the pin is extracted through the action of a jack. The extractor can be attached as desired either to the body of the usual manual screwing machine or a robotic head known in itself.

Abstract: The invention relates to aeronautics in general, and in particular to a suspension device for helicopter, comprising a flexible mounting plate at the center of which is fixed the bottom of the main gear box whose top is supported by hinged oblique bars. The mounting plate offers radial arms hinged to the base of the bars and to the fuselage of the helicopter. These arms bear flapping weights creating forces of inertia with reactions at the attachment points of direction opposite the elastic reactions of deformation of the mounting plate. A device of this type enables the vibrations on board helicopters to be reduced.

Abstract: Process for detecting the under-inflation of a tire of the landing gear of an aircraft in the course of taxiing, said landing gear being formed by at least one bogie comprising a beam provided with a pair of twin wheels at each of its ends provision is made of two bridge assemblies of four strain gauges disposed on each of the parts of the beam located between the median spindle for articulation of said beam to the leg and the corresponding pair of wheels, each bridge being supplied by its diagonal transverse to said beam, while the torsion signal is taken from the diagonal longitudinal with respect to the beam.

Abstract: The invention relates to a suspension device for the main transmission box of a helicopter, comprising two flexible bars which are fixed centrally at the bottom of the transmission box and are supported by articulated joints at strong points of the fuselage and which carry swinging weights at their ends. An articulated rod connects the bottom of the transmission box and the fuselage.

Abstract: The invention relates to an airfoil shape for flight at high subsonic speeds, of the type comprising a flat convex upper surface, a thick leading edge and a lower surface convex towards the leading edge and concave towards the trailing, in which airfoil the upper surface comprises a maximum curvature in the vicinity of its rear part, in a zone delimited by points located at distances from the leading edge equal to 65 and 90% of the chord of the airfoil. The invention is applicable to the production of fixed or rotary wings for aircraft, having a high divergence Mach number and a low drag.