Abstract: A bonded ASP cable includes a multiconductor core which is filled with a waterproofing material. The core is enclosed by a plastic layer (28) which is flooded with a waterproofing material. Wrapped longitudinally about the plastic layer is a corrugated inner shield (31) having a longitudinal seam (35) and having an outer surface covered with a waterproofing material. The inner shield is enclosed by a corrugated outer shield (36) which has an overlapped longitudinal seam (38) and which has an outer surface coated with a layer of an adhesive material. As the outer shield is being formed, a sealant material is introduced into engagement with the inner shield in the vicinity of the longitudinal edge portions of the outer shield. Then as the longitudinal edge portions of the outer shield are overlapped and engaged with each other, the sealant material is caused to flow into cavities between the two shields adjacent to the seam of the outer shield to form a gasket (66).

Abstract: An armored submarine cable joint comprising a tubular housing with internally tapered end portions closely fitting the outer sheath of the submarine cable wherein the armoring wires or tapes adjacent each cable end are splayed and deformed within each tapered end portion. The housing is fabricated from glass filament wound epoxy resin material. The completed joint is potted with a filled epoxy resin system.

Abstract: A splice case for encapsulating a substrate includes first and second containers each of which contain a gel having a cone penetration between 100 and 350 (10.sup.-1 mm) and an ultimate elongation of at least 200%, the gel in each container having an exposed surface, one exposed surface having a cross-sectional area larger than the cross-sectional area of the other exposed surface, the first and second containers being adapted for telescopic engagement.

Abstract: A method of producing a leakage graded coaxial cable having a braided shield, in which ends of the shield wire are dropped as braiding progresses. Gaps in the shield having progressively increasing size are produced through which the radio frequency field leakage occurs, which facilitates providing a constant radio frequency field around the cable. The cable is coated with a jell flooding agent prior to extrusion of its protection jacket, which fills the interstices and gaps of the shield, and solidifies to a waxy, semi-resilient consistency. The resulting cable can be coiled and flexed, maintaining its shield reliability, and rejects water and fluids in case pinholes in the jacket occur.

Abstract: A grease compatible cyclic olefin extended polyurethane comprising the reaction product of an isocyanate terminated polyisocyanate with a polyol in the presence of a cyclic olefin extender and, a plasticizer having a total solubility parameter of between about 8.3 and 8.9 or about 9.1 and 9.7. Certain extended polyurethanes are characterized as being reenterable, such that they can be used for repairing, encapsulation or reclaiming electrical or telephone cables. Alternate formulations can be used as hard volume encapsulants for general elastomer use.

Abstract: A method of sealably encapsulating an article by using, in combination, a plastics heating and pressurizing device and a manually portable accumulator. The device has a chamber to contain plastics material and heat it into a molten state. There is a releasable coupling means to assemble the device and container together to interconnect the chamber with a reservoir inside the accumulator for transfer of the molten plastic material into the reservoir. The accumulator has means for forcing the molten material from the reservoir into a mold cavity when the accumulator has been manually transferred from the device to a mold.

Abstract: A method of forming a connection part for polyolefin insulated electrical wires or cables is disclosed which comprises a cross-linkable reinforcing insulation layer around said connection part, providing around said reinforcing insulation layer a heat shrinkable tube consisting of an integrated assembly of a semiconductive layer and a specific insulated portion consisting of at least two cylindrical heat shrinkable semiconductive members in combination with each other through an insulation material, and then heating said tube under pressure to effect crosslinking of said reinforcing insulation layer and cause said reinforcing layer to become integrated with said heat shrinkable tube. A heat shrinkable tube for use in this method is also described.

Abstract: Method and apparatus for replacing flammable, insulating oil in an oil-filled electric cable by non-flammable, insulating oil in which the flammable oil is withdrawn at least from the cable oil duct under vacuum and with heating of the cable to its maximum operating temperature and thereafter, the flammable oil which was withdrawn is replaced by non-flammable oil. During operation of the cable, oil which flows out of the cable during heating of the cable is sent to a first reservoir, through a check valve and during subsequent cooling, such oil is replaced by non-flammable oil from a second reservoir containing non-flammable oil and connected to the cable duct by a check valve. Also, an oil-filled cable having its insulation impregnated with flammable, insulating oil or a mixture of such oil with non-flammable, insulating oil and having an oil duct filled with a non-flammable, insulating oil which is different from the flammable oil.

Abstract: The structure and process for providing a sealed insulated piping arrangement by introducing a molten sealing material between the inner fluid conducting pipe, and an outer casing, which space may include monitoring wires. The sealing material is introduced in a molten state to provide a liquid-impermeable filling, and then providing an enclosing seal at the end with a smooth transition for passage of the monitoring wires.

Abstract: A bonded ASP cable includes a multiconductor core which is filled with a waterproofing material. The core is enclosed by a plastic layer (28) which is flooded with a waterproofing material. Wrapped longitudinally about the plastic layer is a corrugated inner shield (31) having a longitudinal seam (35) and having an outer surface covered with a waterproofing material. The inner shield is enclosed by a corrugated outer shield (36) which has an overlapped longitudinal seam (38) and which has an outer surface coated with a layer of an adhesive material. As the outer shield is being formed, a sealant material is introduced into engagement with the inner shield in the vicinity of the longitudinal edge portions of the outer shield. Then as the longitudinal edge portions of the outer shield are overlapped and engaged with each other, the sealant material is caused to flow into cavities between the two shields adjacent to the seam of the outer shield to form a gasket (66).

Abstract: A method and apparatus for coating telephone cable or other continuous lengths of cylindrical objects with a continuous coating of molten thermoplastic sealant material. The cable or cylindrical object is passed through an annular array of nozzles operative to apply multiple beads of molten thermoplastic material to the surface of the cable or object. A liquid impervious casing is then placed over the bead coated cable while the beads are still in a molten state. The casing compresses the beads and forms them into a continuous coating of thermoplastic material surrounding the cable or object and contained within the liquid impervious casing.

Abstract: Method of removal of the interior parts of cables in the ground, preferably coaxial (1) and telecommunication (2) cables, for the insertion of new conductors. The insulation material (3,4) may be dissolved or broken down by means of chemical influence of e.g. xylene or copper ethylene diamine for coaxial cable (1) and telecommunication cable (2) respectively, whereby the solution serves as a sliding agent by the withdrawal of the conductor/conductors (5,6). The insulation washers (3) of a coaxial cable (1) may be melted by insertion of a heating element (8) or by means of heat from electrical resistance in the parts (5,7,9) of the cable. The insulation washers (3) in a coaxial cable (1) and the conductors (6) with the insulation material (4) in a telecommunication cable (2) may be milled and removed. By applying electro-magnetic pressurized oscillations the insulation washers (3) of a coaxial cable (1) may be destructed.

Abstract: Waterproof filling medium, used in telecommunication cables with cellular insulation of polyethylene or polypropylene, is based on a mineral oil (with or without a gelling agent such as microcrystalline wax) and includes two non-polar additives. The first is soluble and of low enough molecular weight to reduce significantly the osmotic pressure of the base, but does not diffuse into the insulation below 80.degree. C.; and the second is polymeric and of high enough molecular weight to increase the resistance to flow to obtain the required non-draining property. Filling of cells in the insulation is inhibited.

Abstract: Gas pressurized electrical cables, having a portion of an outer sheath removed for repair or splicing, are sealed while under pressure by providing at the exposed cable portion a gas pressure escape vent having a vent opening of area less than that of the cable exposed portion. Sealant tape is wrapped around the exposed cable portion and the vent exterior effectively sealing the entire exposed cable portion with the exception of the vent opening through which the gas escapes while such sealant tape is applied. The vent opening, being smaller than the original exposed cable portion, is readily sealably closed as by suitably plugging such vent opening and covering same with a sealant material.

Abstract: A cyclic olefin extended polyurethane system comprising the reaction product of an isocyanate terminated polyisocyanate with a polyol in the presence of a cyclic olefin extender and, optionally, a liquid ester or other type of extender. Said polyurethane systems are cured, crosslinked, non-spewing, grease compatible, and reenterable. This extended polyurethane is further characterized as having superior insulating properties so that it can be used for repairing, encapsulation or reclaiming electrical or telephone cables as well as hard volume encapsulants for general elastomer use. The extended polyurethane is comprised of a defined polyurethane, novel extender combinations, and optionally, a coupling agent.

Abstract: In a mineral insulated electric cable the powdered insulating material is impregnated with a quantity of a hydrophobic material, for example a silicone, which has been introduced into the powder in liquid form. The added hydrophobic material serves as a barrier against the ingress of moisture, and liquid dimethylpolysiloxane has been found particularly effective, the pressure of even a small quantity of this preventing any significant degree of moisture penetration into the cable.

Abstract: A method of sealing an exposed area of electrical cable includes forming an enclosure around the exposed area and interposing inlet means into an opening in the enclosure. An encapsulant is poured into the enclosure through the inlet means to surround the exposed area. The enclosure and the inlet means are then sealably covered.

Abstract: A method of making a wire reference electrode in an electrolytic cell is provided wherein the wire reference electrode comprises a lead-in wire portion, a reference wire portion, a sealing material to seal the junction of the lead-in and wire reference portions, and a heat shrinkable insulating material which is heated for a predetermined period of time to collapse the heat shrinkable insulating material about the sealing material.

Abstract: An article for forming a cable block or for enclosing a cable splice comprises a recoverable driver sleeve and a particulate heat-activatable adhesive temporarily restrained adjacent an inner surface of the sleeve.

Abstract: A method and composition for effecting splices of high voltage cable sections for use with a mold placed around the cable sections. The composition comprises a liquid polyolefin, a finely divided solid polyolefin and a chain extension agent capable of reacting to form addition polymer linkages with the liquid polyolefin.

Abstract: A splice between at least two multi-wire electric cables is protected from ingress of water by forming a compressible reservoir about the splice, filling the reservoir with a curable liquid sealant, compressing the reservoir to force the liquid sealant to penetrate into the interstices between the individual wires of the splice bundle and into the adjacent cable core and maintaining the reservoir under compression at least for a time sufficient for the sealant to cure.

Abstract: This invention relates to a method of producing a dam comprising the steps of exposing transmission members 4 by stripping the sheath 3 of a communication cable, covering the exposed portions of the transmission members 4 with a mold 5 and injecting self-curing resin 2 into the mold 5 to cure it. A resin which is cured while being foamed is used as the self-curing resin. The resin 2 is foamed in the mold after being injected into the mold while it is still not foamed. The resin 2 has the pressure increased by increasing the fluidity resistance of the resin 2 as it progresses to be cured when the resin 2 intrudes into gaps between the transmission members 4 within the sheath 3, which is caused by an expansion of volume of the resin 2 during foaming whereby the resin 2 is cured under a high pressure.

Abstract: A method of manufacturing a molded coil for use in an electric apparatus such as a molded transformer or a reactor. The method includes the steps of covering a winding with an insulating prepreg, curing the prepreg under heat, and casting a synthetic resin around the prepreg. The method makes it possible to minimize any thermal stress that may develop in the molded resin layer.

Abstract: A method of manufacturing a longitudinally watertight cable in which a sealing mixture of a vulcanizable silicone rubber, a diluent and a filler is provided in the cable core and between the cable core and the sheath, which mixture, after curing, forms a watertight stopper. According to the invention, a bivalent or trivalent metal salt of a higher fatty acid or a mixture of higher fatty acids is used as a filler. A sealing mixture is preferably used in the method which comprises 15-25% by weight of a multicomponent silicone rubber, 35-45% by weight of silicone oil and 35-45% by weight of calcium stearate. The sealing mixture can be provided, in a blockwise manner, by means of an injection technique.

Abstract: An improved method of joining insulated conductors and providing a water-tight seal. The area about the joined conductors is filled with a putty-like insulation filler material and an O-ring placed on the conductor insulation, some distance from the joint. The joint, including the O-ring, is overtaped with resin-rich insulation tape and the tape is surrounded by a shrinkable polyester film. Heat is applied to partially cure the insulation tape, and to cause the polyester film to contract tightly about the joint.

Abstract: A capping member and method are provided for hermetically sealing a cable end; in a particular embodiment the capping member includes a generally tubular, rigid main body, closed at one end and with a plurality of inwardly deflectable fingers extending from the other end; an injection port, which is suitably located in the closed end, permits injection of sealing material under pressure into the void between the capping member and a cable end over which it is telescoped; in this way the void is substantially filled so that entry of moisture into the cable is prevented.

Abstract: A semiconductor packing substance for an undersea cable transporting electrical power, said cable having a core made of conductors 1 disposed axially, surrounded by a polyethylene layer 3 which is made semiconductive, then by a layer of insulating polyethylene (4). The packing substance is obtained by reticulating liquid nitrile rubber with carboxylic bonds and an epoxy resin to both of which is added a carbon black with a specific surface area at least equal to 100 m.sup.2 /g, an anti-oxidizing agent and a reticulation accelerator.

Abstract: This specification discloses a means for providing a barrier against the passage of fire through that portion of a wall aperture surrounding an electrical conduit, pipe, or the like. This is accomplished by placing a sleeve around that portion of the conduit passing through the wall, which sleeve is the central portion of an envelope which is anchored peripherally to the wall or to a more or less rigid material blocking the aperture through the wall and which sleeve connects to end portions of the envelope, each of which end portions extends to connect with the conduit on an opposite side of the wall. The annular region between the conduit and the surrounding envelope is filled with an intumescent gel. The boot is flexible and capable of some movement to compensate for thermal expansion, vibration or other forces during the life of the installation.

Abstract: An optical fibre cable includes a generally cylindrical elongate central support structure with helical grooves formed around its periphery. The grooves (2) are partially filled with the compound (3) which is viscous at cable operation temperature. Said support structure (1) is then cooled to reversibly harden said compound (3). Optical fibres (4) are then layed in the grooves over the compound in its hard state. Lastly the grooves are topped up with viscous compound.

Abstract: A process and apparatus for filling multi-conductor cables, particularly a telecommunication cable with several insulated wires surrounded by a covering and a sheath, with a mixture of powders which expand with the absorption of moisture. The conductors are fed in spaced relation into the entrance of a casing having an interior, frusto-conical wall which decreases in diameter from its entrance to its exit. The exit is small in diameter compared to the entrance so that the conductors converge as they pass from the entrance to the exit. Intermediate the entrance and the exit, the conductors are subjected to the powders which are caused to follow a helicoidal course by a screw which directs them toward the exit. Due to the shape of the casing wall, the powders are forced toward the conductors.

Abstract: A method of coating uncoated portions of a coated optical fiber is disclosed. In this method a grooved split mold apparatus is used. This fiber, including coated portions of the fiber are placed within the groove and appropriately tensioned so as to prevent contact between the uncoated portions of the fiber and the mold. Injection molding techniques are then used to recoat the uncoated portions of the fiber.

Abstract: Heat treating stranded together conductors in a reeled condition by passing electrical current along a path through some of the conductors in one direction around the reel and then through other conductors in the opposite direction around the reel. In preferred methods, the current is passed in one direction through one half of the conductors and then in the opposite direction through the other half.

Abstract: A process for insulating electrical components located in a conduit from fire comprising mixing and pouring into the conduit a composition comrising a vinyl-containing polysiloxane polymer, an extending filler which is preferably alpha quartz, a platinum catalyst and a hydrogen-containing polysiloxane. The composition is allowed to surround the electrical components in the conduit and cured at room temperature to a solid silicone elastomer. Such a process has been found imminently suitable for insulating electrical components in a nuclear plant from fire for an extended period of time so as to maintain the electrical integrity of the components.

Abstract: The method of rejacketing a fusion splice in an ultraviolet light curable resin jacketed optical fiber comprises the steps of forming a disposable ultraviolet transparent mold including a cylindrical passageway having a diameter equal to the diameter of the jacketed optical fiber; placing the jacketed optical fiber in the passageway with the splice without a jacket thereon being disposed a predetermined distance from the mold; applying an ultraviolet curable resin to an end of the passageway adjacent the splice; pulling the splice very slowly through the resin into the passageway along with a portion of the resin; curing the resin under an ultraviolet lamp; and removing the mold in a destructive manner from the optical fiber after the splice has been completely rejacketed.

Abstract: Longitudinally water-tight cables, such as communication cables, are produced so that the interior of such cables contain a filling material which includes a water-repelling substance and relatively small diameter gas bubbles substantially uniformly embedded therein. The filling material contains an admixture of thermoplastic rubbers or rubber-like thermoplastic materials which are molten at the processing temperature utilized in the course of cable filling and which soldify at the normal operating temperature range of a cable by linking, hooking or coupling via thermoplastic blocks having a correspondingly low melting range, that is lying just below the cable filling temperature. The gas bubbles, which are generated during cable filling, are maintained at their respective spatial positions within the filling material by a rubber-like network which forms in the filling material and the linking or joining points in such network can withstand the buoyancy forces of the gas bubbles without rupture.

Abstract: An overhead electric conductor with optical fibres loosely housed in the bore of a central core, which bore also contains a greasy water-impermeable medium 4, is manufactured by causing a preformed elongate metal member of U-shaped transverse cross-section and the optical fibres to advance in the direction of their lengths, the rate of advance of the fibres being restrained. As the U-shaped elongate member is transversely folded around the optical fibres greasy water-impermeable medium is injected into the bore of the elongate metal member under a controlled pressure. The consistency of the greasy water-impermeable medium the pressure and rate at which it is injected into the bore and the degree of restraint imparted to the optical fibres 3 is such that, in a predetermined length of the conductor, the length of the optical fibres exceeds the length of the bore by a controlled extent, preferably 1 to 3%.

Abstract: A method and apparatus for retarding electrochemical tree-type decomposition of polyolefin electrical insulation by saturating the insulation with a liquid having high resistivity and a low dielectric constant. The insulation of cables which have already been in service is dried prior to being saturated with the liquid. One embodiment of the invention provides a continuing supply of liquid to the cable after it has been buried underground.

Abstract: A gas-insulated power transmission line includes an outer enclosure containing an inner conductor and insulating supports for insulatably supporting the inner conductor within the outer enclosure. An electrically insulating gas electrically insulates the inner conductor from the outer enclosure. The outer enclosure is comprised of two separate components; an outer sheath made of carbon steel, a grounded inner sheath disposed within the outer sheath and made of aluminum. The inner sheath, containing the inner conductor and the insulating supports, is assembled separately from the outer sheath and then the inner sheath assemblage is inserted within the outer sheath at the final field location.

Abstract: In order to reach every void between the individual cable conductors, particularly when filling a multi-pair communication cable, the water repellent substance is supplied to the cable core in great excess; a filling basin surrounding the filling station proper collects the re-emerging excess substance.

Abstract: Electrical apparatus including an enclosure, an electrode disposed within the enclosure, and supports for insulatably supporting the electrode within the enclosure has a permanently sticky adhesive material which is disposed on the interior surface of the outer enclosure. A high-vapor-pressure sublimable material is disposed on the permanently sticky adhesive material, with the sublimable material capable of subliming away in the presence of a vacuum. The presence of the sublimable material enables the apparatus to be non-sticky during assembly and handling operations, while being rendered sticky upon commissioning of the apparatus.

Abstract: This invention relates to a new method for manufacturing a SF.sub.6 pressurized gas continuous spacer cable, and improvements which reduce costs and improve quality control of high voltage cables. The conductor is passed through taping machines for surrounding the conductor with a continuous insulating spacer and through taping machines for applying a conducting shielding material which partially covers the spacer. The insulated and shielded cable is continued on in the same production line into conduit which is laid out horizontal in long lengths or is extruded loose-fit over the cable. The cable is then subjected to vacuum while in the conduit. Terminations are applied. Seals are tested for leaks. The cable is filled with SF.sub.6 gas to a high pressure. The cable is tested at 1.5 times its operating voltage to ground for 30 minutes without failure.

Abstract: This specification relates to a communication cable and method of making it, particularly where the cable includes a high pair count with small conductors so that the filling compound can be made to permeate to the center of the cable without having the filling compound become too viscous to reach the center of the cable when filled by the liquid filling process. The filling compound does not drip at temperatures up to 90.degree. C. From five to ten parts by weight are used of a polyethylene compound as one ingredient of the filler material. The major ingredient of the filler is a paraffinic oil which constitutes 100 parts of the filler compound. Other important considerations are to formulate the compound so that it will not permeate into the cells of the foam skin or all foam insulation.

Abstract: A coaxial electric power transmission cable has an inner conductor within an outer conductor with solid dielectric material provided in the space therebetween. The dielectric material is solid at operating temperatures but non-solid at ambient temperature. An insulative spacer is provided for maintaining the coaxial alignment. The spacer includes insulative material which is identical to the solid dielectric material and may include a solid insulative insert having a solidification point higher than the insulative material whereby at least approximate coaxial spacing may be maintained should the insulative material not be maintained as a solid.

Abstract: A tufted product comprising a primary backing material having pile yarn projecting through its top surface and including an electrically conductive metal foil, the pile yarn being tufted through the primary backing fabric including the electrically conductive foil so that the yarn is in direct contact with the foil so as to render the product antistatic.

Abstract: The conductors of a cable core unit are powder filled by passing the core unit through a fluidized bed of powder with the conductors substantially closed together. The filled cable core unit can be wrapped with tape after exit from the fluidized bed. Cable cores may be filled also by passing them through a fluidized bed. The core units of the cores may be closed together or separated, but the conductors of each unit are closed together.

Abstract: A method and composition for effecting splices of high voltage cable sections for use with a mold placed around the cable sections. The composition comprises a liquid polyolefin, a finely divided solid polyolefin and a chain extension agent capable of reacting with condensation reaction moieties of the liquid polyolefin.

Abstract: For powder filling of cables, in a fluidized powder bed, it has been proposed to pass the cable core through the bed in a substantially closed condition. There is a limit to the number of conductors a core can have for effective filling. In the present invention the cable core is opened up into a number of core units by passing through an opening member. The opening member is freely ridable on the cable core and has a hole for each unit. The opener is held against a support member and an air bearing formed between the two members. Air is also usually fed to the holes in the opener member through which the core units pass to prevent flow of powder out from the bed. The opening member can be positioned in the fluidized bed or outside immediately prior to passage of the cable core through the bed. The units are each in a substantially closed condition in the bed and the units close to a single core also in the bed.

Abstract: Cable core units comprising conductors grouped together by twisting are fed through a fluidized bed to fill voids with fluidized powder by flow of the powder between the grouped conductors. While still in the bed, the units are then deflected around rollers to cause relative displacement of the conductors which causes more complete filling of the voids with powder and powder redistribution to create uniformity of powder fill. Cable cores may also be filled with the core units closed together or separated in the bed but with units closed together when a core is deflected around the rollers.

Abstract: Means are provided to repair one or more flash lamps in a linear type photoflash lamp array which have become disconnected from the circuit board member. Specifically, the disconnected in-lead is secured to the sequential firing circuitry located on the circuit board member with an adhesive deposit of an organic polymer and a surface conductive path thereafter established on said adhesive deposit between the in-lead and the adjacent circuitry. The surface conductive path can also be an organic polymer containing an electrically conductive filler.

Abstract: For powder filling of cables, in a fluidized powder bed, it has been proposed to pass the cable core through the bed in a substantially closed condition. There is a limit to the number of conductors a core can have for effective filling. In the present invention the cable core is opened up into a number of core units by passing through an opening member. The opening member is freely ridable on the cable core and has a hole for each unit. The opener is held against a support member and an air bearing formed between the two members. Air is also usually fed to the holes in the opener member through which the core units pass to prevent flow of powder out from the bed. The opening member can be positioned in the fluidized bed or outside immediately prior to passage of the cable core through the bed. The units are each in a substantially closed condition in the bed and the units close to a single core also in the bed.