Abstract: A fire-resistant and water-resistant low-voltage electrical cable including a conductor and a first internal layer to protect it against water based on a polymer compound containing no halogen, crosslinked or not, and a second layer consisting of a blend of a crystalline propylene homopolymer or copolymer and of a copolymer of ethylene and at least one &agr;-olefin, optionally with a diene, and of an agent having fire retardant properties, the ratio of the thicknesses of the outer layer and the internal layer being from 1 to 7.

Abstract: A sealing device allows the passage of a submarine cable. The cable including a cable jacket, from a high-pressure volume corresponding to surrounding water into a low-pressure volume, particularly for a cable subjected to dynamic stresses. The sealing device includes a gland box system with at least two individual packing elements, each of the at least two individual packing elements in the form of an annular body made of an elastomer, having an inside diameter, and compressed axially within a gland box for the purpose of it being clamped radially inward against the cable jacket and outward against the gland box. In addition, the sealing device includes washers being inserted within the gland box between the at least two individual packing elements. The individual packing element of the at least two individual packing elements closest to the high-pressure volume includes an integral sleeve portion.

Abstract: A power cable joint device includes at least one tubular rigid support element, a cold-shrinkable, pre-expanded sleeve, and a releasable means for immobilizing the at least one support element with respect to the pre-expanded sleeve. Most of an exterior surface of the at least one support element is lubricated by a grease that does not flow under action of a pressure exerted by the pre-expanded sleeve. The pre-expanded sleeve grips the at least one support element over most of a length of the at least one support element. The pre-expanded sleeve also grips the at least one support element at internal ends of the at least one support element. The grease is based on a silicone or on a polyalkylene glycol and includes a filler, a pressure-withstanding additive, or both the filler and the pressure-withstanding additive.

Abstract: A splice for crimping optical fibers includes two half-cylinders, a support block and a pressing block, which are mutually pressed by a crimping cylinder. The support block is provided with a longitudinal groove for receiving the stripped fiber and bears capped edges. The capped edges and stops are symmetrically mounted on either side of the longitudinal axis of the half-cylinders and are designed for maintaining axis of the half-cylinders and are designed for maintaining a small space between the two half-cylinders in the zone where they are located.

Abstract: The invention relates to a sealing device constituted by a round seal (12), that is to say a seal having a non-planar outer surface, and by a flat seal (3) which are contiguous, characterised in that, on either side of the round seal (12) and in the area of the flat seal (3), projects a planar lug (5a, 10a; 5b, 10b) moulded in a single piece with the seal body (12), each of the said two lugs (5a, 10a; 5b, 10b) fitting into a cut out portion of a matching shape provided in the flat seal (3), so as to locate the interface between the round seal (12) and the flat seal (3) entirely in the plane of the latter.

Abstract: The tool is constituted, on one hand, by a lower plate (12) traversed by a calibrated orifice, between an admission chamber (14) equipped with a roller (18) and a cutting plate (15) and, on the other hand, by an upper cover (22) also pierced by an opening (24) emerging in an inlet chamber (26) equipped with a roller (28). The upper cover is placed above the lower plate at distance that is variable so that the calibrated orifice and the opening are aligned, or can be offset heightwise.

Abstract: The present invention relates to a connection protecting device enabling cable ends to be sealingly connected. This device includes a rigid support mechanically connected to each of the cables, a flexible covering wrapping around the ends of the cables, and a seal onto which the flexible covering is applied and suitable for rendering the device tight around the ends of the cables.

Abstract: The device comprises a central spicing body serving to connect in situ two cable end plugs which fit into the splicing body. The central body has lower rails hollowed out therein and bears lateral shoulders for guiding and locking the end plugs constituted by a lower part and by an upper part fixed to one another by a press fit. The device has application in the in situ splicing of optical fibers.

Abstract: An accessory for enclosing the connection area between low voltage power cables has a pair of rigid end flanges for disposition over the adjacent insulated portions of the cables with an elastic wrap around corrugated elastomeric flap intermediate portion between the end flanges for tightly enwrapping the cable connection area. The cables are passed through housing parts or ports in the end flanges, the connections are made, and the wrap around flap is tightly drawn about the connection, making a sealing union with the flanges. Longitudinal edges of the flap are joined and clamped together.

Abstract: The cable (1) comprises a plurality of optical fibre micro-modules (2) grouped together inside an external sheath (4). The external portion of the latter has four bosses (5) moulded integral therewith and which extend along the entire length of the cable and form, along the generating lines of the cable, four diametrically opposed ribs. These bosses, by creating a special arrangement for application to the cable of compressive forces, produce an improvement in crushing strength.

Abstract: The invention relates to a process and apparatus for laying a product of great length (40) in the ground. As a furrow is formed by breaking up the ground a tube is laid in the furrow and, at the same time, the product is pulled inside the tube, at one end by means of a magnetic pulling device including a yoke and a core received in the tube and the yoke. The yoke and core produce a radial magnetic field between them capable of axially immobilizing the core in relation to the yoke. The tube is in the air gap between the yoke and the core and the product is fixed to the core. The pulling force applied to the product is produced by displacing the yoke as the tube is laid.

Abstract: The invention relates to a connecting device (200) to equip an end of an electric cable (100), including a multilayer sleeve having an axis (202) and having an insulating intermediate layer (204) interposed between two layers suitable for ensuring the guiding of an electric field.According to the invention, only the end or ends (207) of the sleeve designed to cooperate with a cable end are in a state of radial expansion such that they present an inside diameter that is greater than the outside diameter of the corresponding cable end and which will be less than this outside diameter once retraction of the said ends of the sleeve has been brought about.The invention also relates to a process for mounting this device on the cable or cables.