Abstract: The cable comprises at least one module (3) of fine conductors (1) each covered in a primary sheath (2), the conductors being wrapped in a supporting sheath (4) that provides mechanical coupling between the fine conductors (1), and the fine conductors (1) being coated in an oil (5) having viscosity lying in the range 100 cPo to 5,000 cPo.

Abstract: The plug comprises an elongate member and at least one measurement ring mounted with radial play on the elongate member and comprising at least one pair of diametrically opposite measurement nozzles fed with gas under pressure, and also at least three centering nozzles disposed around the periphery of the measurement ring on radii that define equal angles between one another, the centering nozzles being fed with gas under pressure independently from the measurement nozzles.

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: A tube for protecting and guiding an optical fiber is constituted by two tubes which are co-extruded and then stretched. The inner tube thus acquires a reduced coefficient of linear expansion, which is closer to that of glass. The outer tube protects the inner tube from fibrils appearing on its surface.

Abstract: In an optical fiber cabling line where a grooved ring is axially drawn at a translational speed, there is provided a device designed to insert optical fibers in helical grooves of the ring. The fibers are unwound, are drawn through a rotating plate and converge following cone generating lines towards the device. In order to avoid the use of fiber-guides coupled directly in rotation with the ring, the device comprises a quill rotationally stationary and coaxial with the ring for laying the fibers into the grooves of the ring, and means, such as two worm screws set orthogonally to the ring, arranged after the quill in the travel direction of the ring and mechanically uncoupled from the ring for thrusting the fibers to the bottoms of the grooves. The worm screw also contributes to align the fibers as they leave the plate, with the ring grooves within the quill.

Abstract: A reserve device is provided for optical fibers, including a flat bottomed case with a core defining a recess having substantially the form of a closed loop omega, at the ends of which inlet and outlet channels are provided for the optical fibers, each fiber being protected by two tubular ducts leaving it bare, coiled about said core, said tubular ducts being immobilized in the inlet and outlet channels when the case is closed, said core including a central part integral with the case, surrounded by a removable ring intended to be removed after coiling of the optical fibers.

Abstract: In order to spread optical fibers emerging from an end of cable and to firmly attach the cable end with ends of protective jackets in which the spread fibers are strung, the following steps are performed by means a spreading device including mainly a grooved hollow distributor. The distributor is fastened to a sawn off end of a grooved elongated ring in the cable by pinching a central armature emerging from the cable, by jaws housed in the distributor. A split ring is strung around a grooved revolution portion of the distributor. For each fiber, a longitudinal slot of the split ring and a respective groove of the revolution portion are superposed, the end of the jacket of the fiber is entered into the groove through the slot, and the jacket is forced into the groove by partially rotating the split ring so as to superpose the slot and another distributor groove.

Abstract: An apparatus accumulating a filiform element in order to absorb differences in input and output travel speeds of the element, without tangling and damaging the element. Mechanical means located above an accumulation container draw the filiform element at the input speed and wind the filiform element in layers of coils stacked on the bottom of the container following an epicycloid or hypocycloid path. Two stationary concentric rings, respectively, attached to and suspended above the bottom of the container, guide the filiform element unwound at the output speed through the bottom of the container to the outside. The apparatus is particularly designed for a very fine and fragile filiform element such as an optical fiber, and is inserted between a multifibering machine and a cabling line.

Abstract: There is provided a device for dispensing optical fibers into helical grooves of a ring drawn through optical fiber cabling lines. The dispensing device comprises a holder rotating about the ring and including conduits each containing a grooved fiber-guide receiving at least one optical fiber. The fiber-guides are arranged along generating lines of a cone coaxial with the ring and have first fiber-output ends designed to engage in the ring grooves. To disengage the first ends of the fiber-guides from the ring grooves while feeding the ring through the cabling line, the fiber-guides are slidably mounted in the conduits and the device comprises a nut means enclosing a washer in which second ends of the fiber-guides radially, thereby translationally moving the fiber-guides along generating lines of the cone respectively.

Abstract: A drawing wheel is intended for exerting tension on a grooved ring while optical fibers are being laid in helical grooves in the core, in order to stretch the ring in a cabling line. The invention is aimed at defining a radius for the wheel in terms of the dimensional characteristics of the ring so that the fibers are kept longer than the grooves as the ring leaves the cabling line and reverts to an initial tension-free state. The radius of the wheel is such thatR'>(p.sup.2 /(4.pi..sup.2 r))-(r+h)where p and h respectively denotes pitch and depth of the helical grooves, and r denotes radius of a central portion of the core circumscribed by bottoms of the grooves. The wheel radius is preferably on the order of one meter or more.

Abstract: In an optical fiber cabling line where a ring having helical grooves is drawn at a constant translational speed by a main motor, there is provided a system for slaving a rotational speed of an optical fiber feeding and dispensing device driven by motor means to a number of ring groove pitches per second in order to compensate for groove pitch fluctuations resulting from the ring production process. The system comprises roller and cam means coupled to the ring and to the feeding and dispensing device for detecting a difference between the rotational speed and the number of pitches per second thereby converting the speed difference into a voltage variation. The motor means comprises a differential coupled to a gearbox connected to the main motor, and a corrector motor linked to the detecting means so as to drive rotationally the feeding and dispensing means at a rotational speed proportional to a rotational speed set by the gearbox and continuously corrected by the detected speed difference.

Abstract: This invention relates to manufacturing a grooved cylindrical core by extrusion. The manufacturing device comprises a single rotating integral die that has a tapered rear portion and a grooved cylindrical front portion. The tapered portion surrounds a stationary central member and guides the material from a main extruder. The front portion has a bore including linear or helical channels. The sealing problems are obviated since the tapered portion and the grooved portion make up an integral die. This die further enables to produce a grooved core perfectly gauged. According to another aspect, the threads or stripes between core grooves are identified by means of auxiliary extruders feeding predetermined die channels with extrusion materials having different colours. This stripe identification is particularly used for a core constituting the central strand of an optical cable.

Abstract: Ends of optical fibers spaced around an axially symmetrical structure are arrayed by a device including an integral thin dividing member substantially disposed transversely to the structure. The dividing member has openings and dead-end channels communicating with the openings. The channels are substantially perpendicular to the structure and have bottoms aligned along a fiber end alignment axis. The fiber ends freely pass through the openings and are pushed substantially perpendicularly to the structure from the openings to the bottoms of the respective channels to array the fiber ends along an alignment axis.

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.