Abstract: Junction box for joining the ends of two underwater optical fiber cables by welding, comprising two clamps 1, 2 connected by a tubular sleeve 3, and a central hollow mandrel 17 for securing the welds, wherein said mandrel comprises a slack chamber 15, 16 in between each clamp and one end of the mandrel. Such junction boxes are mainly for use in the junction of underwater telecommunication cables.

Abstract: A machine for winding, with a very short pitch, on a cable (1), at least one metal sheathing wire (5), comprising a first means for translatably moving a rectilinear portion of the cable in accordance with its axis and at least one coil (4) for distribution of said wire arranged on a coil-holder (3) subjected to turning around said cable in a perpendicular plane to said axis, with said wire passing on a grooved pulley (8) which is arranged between the coil and the cable and which has a fixed axis in relation to the coil, characterized in that the pulley (8) is provided with a driving means (9, 18, 20, 21, 22, 23) in rotation at an adjustable speed.

Abstract: An electric cable (1) for transporting very high current at low voltage, in particular a welding cable for use in robot welders, comprises at least one multi-strand conductor (2) and an outer sheath (4), cooling water circulates inside the cable, and the water grains access to the conductor strands to be cooled by virtue of the conductor being covered by a perforated envelope (3).

Abstract: A device for joining an underwater optical fiber cable and a repeater comprising a fiber feed-in cable, the end of said underwater cable being secured in a jointing block by means of a tapered ferrule and hard-setting resin filler, said device comprising a slack chamber for storing surplus lengths of optical fiber, said slack chamber interior being bounded on the underwater-cable-side by a storage canister having a bulged internal wall the radius of curvature whereof is everywhere greater than or equal to the minimum acceptable radius of curvature for the optical fibers, and on the fiber-feed-cable-side by a plug having a conical internal surface. Device is mainly applicable to the joining of undersea telecommunications cables.

Abstract: In a multiple joint for underwater optical fiber cables, a first cable termination terminates at least one cable and incorporates a storage chamber for excess lengths of fiber. A connecting member is fastened to the end of said at least one cable, and a first reinforcing member laterally surrounds the first cable termination. A second cable termination terminates at least two parallel cables and incorporates a common connecting member fastened to the ends of each cable, a watertight member adapted to close it off and passages in this watertight member for respective fibers of the cables. There is a storage chamber for excess lengths of fiber on the outside of this watertight member, and a second reinforcing member laterally surrounds the second cable termination. An access cable incorporates fibers from the storage chamber in the first cable termination welded to fibers from the storage chamber in the second cable termination.

Abstract: Radiating coaxial electric cable comprises a conductor core (1), a cellular dielectric (2), an outer conductor (3) having apertures for the passage of electromagnetic radiation, and an outer insulating sheath (4). The radiation-passing apertures consist of successive series of holes (6) aligned according to a helix segment pattern.

Abstract: A method of manufacturing an optical fiber cable involves embedding a traction-resistant axial strength member of at least one wire of precipitation hardened martensitic steel in a rod of thermoplastic material extruded thereabout while forming longitudinal grooves or cavities in the periphery while subjecting the rod and the strength member to an initial axial traction stress, extending them by less than their elastic limits, disposing optical fibers in the grooves or cavities of the rod while still under axial traction stress, and removing the axial traction stress. An extrusion machine has a head terminating in an axial outlet. A fixed member extends around a rotary die supporting the die on bearings internally of the fixed member. The fixed member is fixed to the front face of the extrusion machine and supports a die inlet axially spaced from the front face and the head outlet to ensure that a small controlled amount of plastic material leaks radially at the gap to the exterior.

Abstract: A liquid-cooled electric cable for transporting very high currents at low voltages, the cable comprising a non-sealed tube (1) or other preformed duct surrounding an axial liquid flow cavity, a conductive core (3) surrounding the tube, a separation envelope (4) made of a non-conductive material, an outer conductive layer (8) which is coaxial with the conductive core, and an outer sealed sheath (13). The separation envelope is in contact with the conductive core and the outer conductive layer, and wherein it has openings suitable for allowing cooling liquid to flow between the core and the outer conductive layer.

Abstract: A connection for connecting a submerged optical fiber line cable (1) to a housing (18) for equipment such as a repeater (17), said housing being provided with an optical fiber access cable (16). The line cable comprises an optical core containing optical fibers, an arch of steel wires surrounding the core, a copper tube swaged down over the arch, and an insulating sheath over the copper tube. The end of said line cable is fixed to a connection piece by means of a conical ring and a plug of hardenable resin. The connection includes a magazine (15) for storing excess lengths of said optical fibers, and said access cable is constituted by a tube inside which the optical fibers extend freely.

Abstract: Each cable has an optical fiber core (1, 1') an arch of steel wires (2, 2'), a copper tube (3, 3') swaged onto the cylinder, an insulating sheath (4, 4') a return conductor (14, 14') and another sheath (16, 16') which is a protective sheath. Said connection has, at each cable end, a fixing part (8, 8'), a splaying out wedge (15, 15') and a plug of hardenable resin (11, 11'). The connection also has ports (12) provided in the fixing part (8) and, around the fixing parts, an inner tube (23) provided with ports (21) in which support wires (26) are placed, weld sleeves (28) connecting together the fibers (22, 22') being on said support wires by tapes (27) and slung across said ports, an outer tube (20) covering the inner tube, a sealing mould (31), a conductive metal braid (32) and a heat-shrinkable sleeve (33).

Abstract: The cell comprises around the end of an optical fiber (1) three resilient elongate rods having bulging ends and held clamped against the fiber by a cartridge (5) which is itself held in a cell body (9). Two identical cells can thus be placed face to face with a 1/6th of a turn offset to provide a quality junction, using a suitable connector of any type.

Abstract: Extension (1) of a coaxial cable core (21) made of a tube. This extension is characterized by the fact that it includes a cylindrical socket (2) with tapered end (4) of a diameter larger than the inner diameter of the tube and made flexible by longitudinal slots (6), a polygonal nut (10) of which angles (11) are introduced in longitudinal slots (6) of socket (2), a traction screw (12) which is screwed into the nut and includes a pick-up end (16); this traction screw abutting against the tube, after introducing the nut into socket (2), then this socket in core (21), thus pulling the nut longitudinally to push apart and tighten the flexible tapered section on core (21) inner wall (21').

Abstract: A fire-resistant thermoplastic composition includes at least one ethylene polymer and/or a copolymer of ethylene and another organic compound, an inorganic loading material capable of releasing oxhydryle ions, an alkoxysilane acting as a coupling agent between the polymer or copolymer and the inorganic loading material, and a plasticizer.The alkoxysilane is an aminoalkyl-alkoxysilane, and the polymer or copolymer is non reticulated.

Abstract: A submarine power cable conductor consisting of at least one layer of stranded metal wires, all of said wires being laid in the same direction and at a periodically varied angle.

Abstract: A connection device for a cable incorporating optical fibres and metal conductors. A connection device for a cable incorporating both optical fibres (10) and metal conductors (34), comprising (a) a socket including a barrel with male electrical connection members (25), a ferrule containing the optical fibres (28) and an angular position defining device (29), and (b) a connector including a barrel with female electrical connection members (6), a ferrule containing the optical fibres (9) and an angular position defining device. The connector and/or socket are connected to a body (2) joined to the end of a cable and comprising means (30, 31, 32, 33) permitting relative rotation of the connector and/or socket relative to the end of the corresponding cable.

Abstract: Apparatus (1) for stranding armor wires (11) about a cable core (10), the apparatus comprising a rotary plate (2) equipped with armor wire bobbins (3), a rotary distributer grid (4) driven by the plate, and a stranding die (5) for bringing together the armor wires around the cable core. The improvement lies in the apparatus including a coupling (20) situated between the plate and the distribution grid, together with a brake (40) for stopping the distribution grid. If a stranding operation is interrupted, the distribution grid is braked and stopped in time with the cable core stopping its longitudinal movement, leaving the plate to continue to rotate for a turn or more under its own inertia. Excess twist is thus prevented from crushing the cable core.

Abstract: A method of manufacturing an insulant having a self reticulating structure for an electrical cable including at least one bare wire (1) obtained from a wire-drawing machine (10), the method comprising:using grafted polyethylene which is finely crushed or which is obtained in powder form;finely crushing gypsum to act as an expansion agent and as a reticulation catalyst;mixing the polyethylene and the gypsum without kneading; andmaking a fluidized bed or an electrostatic suspension of the resulting mixture and passing a bare wire through the resulting fluidized or suspended mixture while the wire is at high temperature at the outlet from the wire-drawing machine, the temperature being in the range 200.degree. C. to 350.degree. C.

Abstract: A polymer material which contains ethylene groups and is made fireproof by an organic brominated additive, antimony oxide and optionally a phosphate or pyrophosphate containing titanate. It contains:(a) a non-reticulated polymer matrix containing 40% to 60% by weight of polyethylene and 40% to 60% by weight of a copolymer of ethylene and of alkyl acrylate;(b) 25% to 35% by weight related to the weight of the polymer matrix of the organic brominated additive which is decabromodiphenyloxide, octabromodiphenyl or hexabromodiphenyl;(c) 8% to 19% by weight related to the weight of the polymer matrix of antimony oxide(d) and optionally 0.1% to 0.5% by weight related to the weight of the polymer matrix of an organo phosphate containing a phosphate or pyrophosphate radical.

Abstract: A method of injecting a viscous filler material into fiber-receiving grooves in the core (1) of an optical fiber cable, the method comprising the steps of: winding a first tape (5) spirally around the fiber-containing core and leaving gaps between adjacent turns of the said first tape; passing the taped core through a calibrated bore (12) of slightly greater diameter; injecting (11) viscous filler material into the said bore at a pressure chosen in relation to the speed of progress of the core through the bore to ensure that the filler material passes through the gaps between the adjacent turns of the tape to completely fill the volume of the grooves that is unoccupied by the fibers, but without the filler material being able to extend back along the grooves upstream from the point of injection; and winding a second tape spirally around the core containing both the fibers and the filler material in its grooves, said second tape being wound so as to close the gaps between the turns of the first tape.

Abstract: A connection for joining the ends of two under-water optical fiber cables each comprising: an optical core constituted by a carrier wire covered by a helically grooved plastics rod with optical fibers inserted in its grooves; a protective tape surrounding the optical core; a steel wire arch assembly; a copper tube drawn down over the arch assembly; and a plastics insulating sheath.Said connection includes two smooth rods (22, 22') glued to the ends of each cable on the carrier wire (2, 2') round which the optical fibers (4, 4') are wound, the fibers being welded one-to-one and protected by tapes (23, 23'), two split tubes (24, 24') covering the optical fibers wrapped in tape at the ends of each cable, a sheath (19) around which the ends of each arch assembly are formed again into cables and a sleeve (12) glued and/or crimped on the ends of each arch assembly.