Abstract: The invention relates to an inspection device for inspecting the dimensions of an object, the device being of the type comprising a support-forming portion together with an elastically deformable system having two measurement arms and an element connected to the arms in such a manner as to be displaced in an axial direction for co-operating with an associated displacement sensor. According to the invention, the deformable system is in the form of a one-piece element that is generally W-shaped, with two hinged measurement arms connected together by two link arms, together with an axially movable central arm; the one-piece element is essentially flat, and it deforms in its own plane when contactors provided at the ends of the hinged measurement arms are moved apart or towards each other. The device is particularly applicable to inspecting inside or outside diameters of mechanical workpieces.

Abstract: The device comprises a source of gas under pressure, a measurement branch connected to the source of gas under pressure and including a feed nozzle and a measurement member, a measurement pressure sensor connected to the measurement branch between the feed nozzle and the measurement member, and an absolute pressure sensor connected to the source of gas under pressure and having an input connected to a reference electricity source and an output connected to an input of a differential amplifier having another input connected to the reference electricity source and an output connected to the power supply terminal of the measurement pressure sensor.

Abstract: The telecommunications cable of the invention comprises a series of optical fibers which are preferably coated with respective colored identification layers, the fibers being split into modules each of which is enveloped by a thin supporting sheath that is easily torn, with different sheaths preferably being of different colors, the sheaths being in contact with the optical fibers, and a protective covering being in contact with the supporting sheaths.

Abstract: The electrical stress control electrode to be arranged around an unshielded junction end portion of a conductor insulator comprises a sheathing member having several successive adjacent zones each having a non-linear electrical resistance different from the adjacent zones, said resistance typically increasing towards the high voltage parts of the junction. The zones are made of a plastic material support compound or binder including particles of silicon carbide or zinc oxide, the different resistances being obtained by varying the concentration of particles of a same grain size from a zone to another, or by progressively steppingly varying the grain size of the particles for a given concentration from a zone to another.

Abstract: A method of extruding a cross-linked material, more particularly an insulating cross-linked material around an electrical cable. In an extrusion machine comprising a housing terminated with an extrusion head and provided with a filtering means adjacent the outlet end of said housing, the cross-linkable product is fed without addition of a cross-linking agent, said cross-linking agent being first introduced in said cross-linkable material downstream said filtering means. The cross-linkable material is kept in the housing at an elevated temperature to be in a fluid state, the cross-linking agent being introduced at a temperature slightly lower than its reaction temperature, whereby the extrudate may be at a temperature near the maximum temperature admissible for the extrusion of said material.

Abstract: A method of extruding a cross-linked material, more particularly an insulating cross-linked material around an electrical cable. In an extrusion machine comprising a housing terminated with an extrusion head and provided with a filtering means adjacent the outlet end of said housing, the cross-linkable product is fed without addition of a cross-linking agent, said cross-linking agent being first introduced in said cross-linkable material downstream said filtering means. The cross-linkable material is kept in the housing at an elevated temperature to be in a fluid state, the cross-linking agent being introduced at a temperature slightly lower than its reaction temperature, whereby the extrudate may be at a temperature near the maximum temperature admissible for the extrusion of said material.