Abstract: Methods and apparatus for manufacturing an improved ribbon cable comprising a plurality of insulated wires juxtaposed in fixed relationship to each other and an improved transposed cable in which each conductor of the cable of the invention is in the form of a continuous helix. The electromagnetic device of the invention has the ribbon cable of the invention as its magnetic windings.

Abstract: Environmental sealing may be achieved by means of a flexible envelope having therein a sealing material having a cone penetration value preferably from 100-350 (10.sup.-1 mm) and an ultimate elongation of at least 100%. The material is preferably mechanically deformed preferably by shear and preferably causing it to be comminuted.

Abstract: There is disclosed a method of manufacturing and marking a cable including the steps of drawing a plurality of conductors in a longitudinal direction through an apparatus that affixes a plurality of magnetizable inserts along the length of the conductors with a distribution associated with a plurality of particular locations along the length of such conductors; applying a protective jacket of insulating material about the conductors and affixed magnetizable inserts; and marking the outside of the protective jacket in accordance with control signals generated by a sensing device that detects the presence of each of the magnetizable inserts as the cable is drawn through the sensing device.

Abstract: Electrically insulated wire with an inner layer of non-crosslinked and non-crosslinkable polymeric material and a skin layer of irradiation crosslinked material compatible with the inner layer. The inner layer provides desirable flexibility and electrical insulating properties suitable for telecommunications cable and appliance wiring. The skin layer gives abrasion resistance suitable for the above purpose and heat resistance and fire retardance properties suitable for building wiring. The polymeric material of both layers is preferably of a polyvinylchloride composition.

Abstract: A method of manufacturing a flexible electric cable constituted by a polymer-coated stranded conductor made up of fine strands of aluminum or aluminum alloy having a diameter of less than 0.5 mm, or constituted by one or more insulated conductors surrounded by an electric screen itself constituted by fine strands of aluminum or aluminum alloy having a diameter of less than 0.5 mm and wrapped or braided about the conductor(s). The screen is surrounded by at least one insulating layer of polymer material, wherein the operation of stranding together the fine strands forming the conductor or of wrapping or braiding the strands surrounding the insulated conductor(s) and forming the electric screen is performed by using fine strands which are not annealed or which are only partially annealed, with the stranded conductor or the wrapped or braided electric screen then being covered with insulation and subjected to at least one final annealing operation.

Abstract: This invention relates to a deactivatable tag useable with an electronic article surveillance system and comprised of planar conductive material cut into a pair of inverse, first and second spiral conductors wrapped about each other and positioned for capacitive and inductive coupling. The invention also relates to method of making tags wherein conductors are cut from a planar web of conductive material in a continuous process in a manner that the cutting results in the formation of two spiral conductors without accompanying waste of conductive material, and thereafter positioning the conductors to provide resonant circuits. The conductors of each pair are connected by welding to provide a reliable circuit. A film of electrostatic-charge-draining material on a web of deactivatable tags prevents their premature deactivation.

Abstract: A light wave conductor-sensor for tension, comprises a primary coated light wave conducting element, at least one coil wound on the primary light wave conducting element and forming together with the latter a sensor core, and a compound including longitudinally extending tension-proof fibers embedded in a synthetic plastic matrix, the compound forming a casing for the sensor core.

Abstract: Shield tape (10) surrounds cable (20) in a sleeve-like fashion as it is fit through forming die (22) into cabling machine (28). Shield tape (10) is a metal foil mounted on a plastic substrate. Microencapsulated lubricant in a binder is incorporated on the outer surface of the metal foil portion of the tape (10).

Abstract: During the heating of a moving wire (21) such as when the wire is being aaled, the wire is heated in such a manner that the energy applied to each successive increment of length of the wire is substantially constant. This is accomplished by causing an integral number of half cycles of alternating curent to be applied to each successive increment of length of the wire as the increments are moved from one sheave to another in an annealer (20). In one embodiment, the integral number of half cycles is achieved by adjusting the speed at which the wire is being advanced between two sheaves of the annealer in a manufacturing line. This also may be accomlished by adjusting the distance between the sheaves in an annealing leg of the annealer, or by adjusting the frequency of the applied power source.

Abstract: A coaxial cable is provided having a ribbon inner conductor surrounded by a dielectric and a circumferential conductor. The coaxial cable may be microminiature comprising a very thin ribbon strip conductor from between 5 to 15 .mu.m thick and from 150 to 200 .mu.m wide, having a surrounding foamed dielectric or parylene applied thereon by a vapor plasma process and an outer conductor of an adhering high conductivity metal vacuum deposited on the dielectric. Alternately, the foam dielectric embodiment may have a contiguous parylene coating applied adjacent the inner conductor or the outer conductor or both. Also, the cable may be fabricated by forming a thin ribbon of strip conductive material into an inner conductor, applying thereabout a dielectric by spraying on a solution of polystyrene and polyethylene and then vacuum depositing and adhering high conductivity metal about the dielectric.

Abstract: An electromagnetic radiation suppression covering conformable to a corresponding selected structure through reducing the extent of a surface dimension therein and containing one or more absorptive kinds of particles in a sheet of a corresponding thickness including such particles as iron oxides with adsorbed surface layers, such covering being formed through extruding a mixture of selected particles and binding material.

Abstract: An electrical cable with a core comprising an electrical conductor surrounded by insulation and with both a screen of wires in open helix configuration on the core and at least one other wire extending longitudinally of the core and electrically contacting the wires of the screen. An insulating sheath surrounds the screen and may itself embed the wires or it may surround a layer of extruded material which at least partially embeds the wires. The material of the layer may be insulating or semi-conductive. Also, a process for manufacturing such cable.

Abstract: A crosslinked polyolefin insulated power cable with remarkably improved AC breakdown voltage and impulse withstand voltage has been obtained by a process which comprises extrusion-coating, on the outer surface of a conductor, (1) a material for the formation of an inner semiconductive layer, comprising a base polymer and N-vinylcarbazole, (2) a crosslinkable polyolefin material for the formation of a crosslinked polyolefin insulating layer and (3) a material for the formation of an outer semiconductive layer in this order and then subjecting the coated conductor to a crosslinking treatment to form, on the outer surface of the conductor, an inner semiconductive layer, a crosslinked polyolefin insulating layer and an outer semiconductive layer in this order.

Abstract: An electric cable to be used as phase winding of a three-phase alternating current winding for linear motors. The cable has a compacted, soft-annealed stranded conductor (5) on which a conductive layer (7) is firmly anchored. The insulation (8) and the outer conductive layer (9) are applied in the same operation as the extruded inner conductive layer (7) and are firmly attached to the latter. A sheathing (10) which is of good electrical conductivity and mechanically stable is applied over the outer conductive layer (9).

Abstract: A laminated construction comprising at least three extruded layers of polymer-based material in which an intermediate layer (4) between a first layer (3) and a second layer (5) is strippably bonded to the first layer (3) and fully bonded to the second layer (5) such that the second layer together with substantially all of the intermediate layer (4) is readily strippable from the first layer (3). In particular, the invention relates to an insulated electrical cable in which such a laminated construction is arranged substantially coaxially about a core conductor (1); the first layer (3) being an inner layer of insulating material, intermediate layer (4) being either of insulating material or of a semi-coductive shielding material and the second layer (5) being an outer layer of a semi-conductive shielding material. Preferably, an additional layer of semi-condutive shielding material is positioned between the core conductor (1) and the first layer (3).

Abstract: A highly flexible, shielded electrical cable having exceptional pliability and limpness is provided for connection to devices such as hand-held medical instruments to minimize the resistance to movement of such devices imposed by such cable. The normal stiffness of shielded cables caused by a braided wire shield is minimized by eliminating the frictional resistance to relative movement between the shield and the dielectric covering of the conductor assembly inside the shield. This is accomplished by loosely braiding the shield around the dielectric covering so as to impose no transversely inward force on the dielectric covering. Preferably, a clearance is formed between the shield and the dielectric covering, and the density of the braided shield is maximized to render it self-supporting. The outer dielectric jacket of the cable likewise loosely encircles the braided shield to eliminate frictional resistance to relative movement between the shield and jacket.

Abstract: The invention relates to a method of and a device for simultaneously generating heat energy and oscillation energy. In the method heat is generated by induction heating and oscillations are created by means of at least piezoelectric elements. Previously a resonance circuit formed by a series connection of an inductive component and a capacitive, piezoelectric component has been used for the generation of oscillations only. A disadvantage of this kind of circuit has been that the circuit is difficult to control on account of the narrow resonance region of the piezoelectric element. This advantage is avoided in the solution according to the invention in such manner that one and the same resonance circuit formed by a series connection of an inductive and capacitive element generates both heat energy and oscillation energy.

Abstract: A telecommunications cable having no metal sheath, but having a plurality of equally pre-tensioned and inextensible tensile members embedded in the cable jacket. These members are spaced apart around the core and extend longitudinally of the cable to apply an axially compressive force upon the jacket. The members may be glass fibers and each member is preferably a roving of fibers. The filaments may be coated with a material which sticks them to the jacket and the core may be filled with a moisture blocking material.

Abstract: A corrosion-resistant electric cable has a metallic conductor, a polymeric insulating jacket surrounding the metallic conductor, and a corrosion-inhibiting powder comprised of a hydrophobic material disposed between the metallic conductor and the insulating jacket. The corrosion-inhibiting powder may be comprised of a mixture of a hydrophobic fumed silica powder and a hydrophobic polyethylene powder.

Abstract: Very high levels of insulation resistance and of insulation resistance stability of insulating compositions having polyolefin bases and having polar organic additives are achieved in this invention. The polar organic additives can be organic halogenated flame retardants, such as decabromodiphenyl oxide. The surprising increase in insulation resistance and in insulation resistance stability is achieved by addition of certain antioxidants in combination and, particularly, the addition of a zinc salt of mercaptoimidazole and a sterically hindered di-tertiary butyl phenol. The composition may be crosslinked by radiation or even by chemical means as through use of organic peroxides without loss of the surprisingly increased insulation resistance and insulation resistance stability.

Abstract: A reinforced electrical cable having a plurality of conductor assemblies in an armor covering, and filler material filling the interstices between the conductor assemblies and the armor covering, and the method of forming the cable. Each conductor assembly includes a core of conducting material, a layer of insulation which surrounds the core, a second layer of chemical barrier material which surrounds the first layer and a layer of reinforcing material surrounding the insulation layer. The plurality of conductor assemblies are then arranged as desired and the filler material (in the unvulcanized state) is placed around and between the conductor assemblies. The quantity of filler material placed between and around the conductor assemblies is sufficient to fill the interior of the armor covering in its unvulcanized state. The armor covering is next placed around the conductor assemblies and the filler material. The unvulcanized filler material conforms to the interior of the armor covering.

Abstract: The invention concerns a method for producing a coaxial cable intended for the transmission of very high frequency signals. This coaxial cable comprises a dielectric insulating layer composed of foamed polytetrafluoroethylene or a composition comprising at least 80% of this product named hereinafter COMPOUND. The layer of insulating material is directly obtained by cold extrusion of a COMPOUND powder, the intimate mixing of a pore-forming agent and a foaming agent and a lubricating oil. The mixing of the COMPOUND powder, the pore-forming and foaming agents is effected dry or in aqueous dispersion. Principal application: Fields of use of ultra-high frequencies such as radars and transmissions.

Abstract: In the making of cable with spaced conductor wires or tensile members in a non-circular jacket, the wires of member are maintained in desired angular positions within the jacket by guiding them through a core tube which is controllably rotatable within the extruder cross-head. The angular positions of the wires or members are monitored and upon their positions departing from the desired positions, the core tube is rotated in the appropriate direction to return them to the desired positions.

Abstract: The present invention is directed to a communication cable having improved adhesion between metallic and non-metallic layers. The cable has a metallic core structure in which at least one optical fiber and/or electrical conductor is housed, at least one external layer fabricated from a non-metallic material and an adherent, plasma deposited polymeric film coating between the core structure and an external layer for improving the adhesion between the core structure and the external layer. A process and apparatus for fabricating the communication cable are also described.

Abstract: In the production of an optical fibre cable a core (3) of thermoplastics material is extruded with a plurality of longitudinally-extending grooves (15) in its outer surface around an electrical conductor (1) and is initially cooled: then following the introduction of one or more fibres (11) in at least one of the grooves the core assembly is passed through an induction heating unit (17) in which the conductor is heated to an extent sufficient to soften at least the adjoining region of the core, and the core is twisted to cause the grooves to take up a helical or periodically reversing helical path, and is again cooled to leave the grooves in that condition.

Abstract: An apparatus comprising two concentrically arranged tube stores, a device for passing a cable core through the inner tube of the concentrically arranged tube stores and a stranding nipple characterized by a device for applying adhesive to a web being spun onto the tube store so as to secure the spun covering thereon. Preferably, the spun covering is applied in an SZ stranding manner with the inner covering reversing directions of twist at a point different than the outer covering.

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 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: Making an insulated electrical conductor having an insulation layer formed from dielectric carrier with magnetically permeable particles dispersed therein in which the conductor bearing the layer is passed through a magnetic field to cause an increase in magnetization of magnetic domains of the particles towards a single direction.

Abstract: A process for producing an insulated rectangular wire adapted for edgewise winding. A round wire of copper, copper alloy, aluminum or aluminum alloy is drawn through a die in a tandem-extrusion apparatus. The drawn wire is then electrolytically cleaned, following which an insulating coating is applied to the cleaned surface. The insulating coating is baked, and finally the insulated wire is subjected to at least one cycle of rolling. Preferably, the drawing is done with a single die and capstan to thereby remove any surface defects in the conductor having a size of 3 .mu.m or greater. The capstan should be made of a material softer than the material of the conductor. Further, it is preferred that fresh lubricating oil containing no metal dust be applied to the surface of the conductor during the drawing process.

Abstract: A diverter and coextrusion diverter are described which include means for adjusting the cavity of the diverter so as to control the uniformity of extrudate exiting the diverter.

Abstract: A method of making insulated wires or cables in which a tube of crystallizable polymeric material is first extruded over size on the wire, cooled until it can be gripped and then reheated and stretched to produce crystalline orientation and to collapse it into contact with the wire is distinguished by first holding the tube at a temperature between its glass transition temperature and its crystalline melting point long enough for the degree of crystallinity to be significantly increased. Physical properties after orientation are considerably improved.

Abstract: An improved cable having a metallic inner conductor, a dielectric material surrounding the inner conductor and a metallic outer conductor or sheath comprises corrosion inhibiting adhesive disposed at the interface between at least one of the metallic conductors and the dielectric. The adhesive composition comprises a polyfunctional silane compound reacted with the metallic surface of the conductor and providing corrosion resistance thereto while also promoting bonding between the conductor and the dielectric.

Abstract: A diverter and coextrusion diverter are described which include means for adjusting the cavity of the diverter so as to control the uniformity of extrudate exiting the diverter. The diverter including a gap having beveled opposing faces.

Abstract: A low mechanical noise coaxial cable for suppressing noise due to mechanical movement of the cable wherein the cable includes a central conductor, a dielectric surrounding the conductor, electrical shielding embedded in conductive material surrounding the dielectric and preferably, jacketing structure holding the above recited elements in place.

Abstract: A method of making a multiconductor cable assembly is disclosed wherein at least a portion of the cable assembly is comprised of multiple insulation-sheathed conductors arranged side-by-side in contiguous relation so that the insulation sheaths of adjacent conductors have a substantial interfacing contact area. First and second beads of material integral with the adjacent conductor sheaths and located adjacent each side of the interfacing contact area hold the cable together and maintain its flat profile. The cable can also include portions having a compact profile and can have unbonded ends. The cable assembly is formed by applying a bonding agent, comprised of a filler dissolved in a solvent for the insulation sheaths, as a bead between each pair and on each side of contiguous conductor sheaths. The bonding agent beads initially intermingle with the insulating sheaths material, but do not penetrate into the interfacing area between contiguous sheaths.

Abstract: A body implantable intravascular lead with a first layer of plastic defining a tube having a precision lumen therein and at least one electrical conductor wrapped helically along the length of one or more plastic layers. The conductors are substantially parallel along the axis at each end for ease of connection to electrodes and the helical wrap of the conductors may vary throughout the length to form a first length having a first flexibility and a second length having a greater flexibility incapable of sustaining the same axial mechanical loading. The conductive wires are overlaid with one or more layers of plastic separately insulating the wires from each other.

Abstract: An elongated metallic conductor is insulated with an inner layer of a plasticized polyvinyl chloride composition and an outer layer of a plasticized, irradiation cross-linked polyvinyl chloride composition. The outer layer has a low coefficient of friction to facilitate pulling in central office racks, has mechanical properties which are required for installation and use and, in a preferred embodiment, has a thickness which is substantially less than that of the inner layer. The layers are extruded in the same extruder crosshead that seemingly causes the outer layer to bond to the inner layer to facilitate stripping of the composite insulation from the conductor.

Abstract: An electrically insulating, overcoated bulky sleeve is disclosed comprising a tubular sleeve prepared from bulky (i.e. low density, high surface area) continuous filament yarns and an overcoating. When an electrical conductor is positioned therewithin, the large surface area of the bulky yarns of the interior of the sleeve provides an intimate fit for an expanded range of conductor diameters. For applications where a void-free impregnation of the sleeve interior between the overcoating and the conductor is desired, the large interior surface area of these sleeves can promote retention of the impregnation composition. The overcoated sleeve can be expandable, deforming to allow pull-back and return or fold-over, and/or conforming to accept transitions in conductor diameter. The overcoated bulky sleeve can be employed in a method for electrically insulating a conductor, which method may further include an interstitial impregnation step.

Abstract: The insulating spacer for an h-f cable is extruded on the inner conductor, at approximately the correct dimensions, followed by a sizing step in which insulation powder is deposited on the horizontally running, insulated conductor core and melted in a funnel-shaped die to obtain a coating or film which establishes the final dimensions. The outer conductor is formed on top of that coating.

Abstract: An improved multilayer electric cable is disclosed having a conductive core, an extruded strand shield (ESS) layer, an insulating layer of polymeric insulation material surrounding the core and coaxial therewith, a semi-conductive insulation shield (EIS) layer strippably bonded to the insulation layer surrounding it and coaxial therewith and, preferably, a plurality of axially extending drain wires disposed within the semiconductive EIS layer. The semi-conductive EIS layer is formed of a copolymer of an ethylene/alkylacrylate/monoalkyl ester of 1,4-butenedioic acid copolymer, conductive carbon black, and a peroxide curing agent and preferably also a copolymer of ethylene and propylene or a copolymer of ethylene, propylene and an unconjugated diene. The semi-conductive EIS layer is applied by extrusion at elevated temperature in a dry gas atmosphere.

Abstract: An improved multilayer electric cable is disclosed having a conductive core, an extruded strand shield (ESS) layer, an insulating layer of polymeric insulation material surrounding the core and coaxial therewith, a semiconductive insulation shield (EIS) layer strippably bonded to the insulation layer surrounding it and coaxial therewith and, preferably, a plurality of axially extending drain wires disposed within the semiconductive EIS layer. The semiconductive EIS layer is formed of a copolymer of an ethylene/acrylate/monoalkyl ester of 1,4-butenedioic acid copolymer, conductive carbon black, a peroxide curing agent and polyethylene or polyethylene copolymer. The semiconductive EIS layer is applied by extrusion at elevated temperature in a dry gas atmosphere.

Abstract: A process for producing a highly expanded polyolefin insulated cable comprising the steps of feeding a compound of polyolefin, nucleating agent and volatile liquid to an extruder, heat extruding said compound through said extruder onto an inner conductor passing through said extruder to cover the outer periphery of said inner conductor thereby forming an insulation layer of highly expanded polyolefin foam having a foaming ratio in excess of 2.5 times (60% expansion degree) tightly adhered to said inner conductor.

Abstract: A thin, flexible, electrically conductive adhesive tape is described suitable for do-it-yourself wiring in low voltage applications including a pair of longitudinally extending parallel electrical conductors each made of a multiplicity of strands of wire enclosed within a backing strip. The backing is paper-thin and can comprise a pair of layers of transparent or translucent plastic material bonded together around the conductors or a single thickness within which the conductors are embedded, the backing being formed for example by co-extrusion of upper and lower layers which are brought together while still in a molten condition so as to fuse together totally enclosing the wires. A stripable cover sheet is preferably provided over a pressure sensitive layer on one surface of the tape. The tape can be separated longitudinally into two tape strips by the provision of a central longitudinally extending line of perforations.

Abstract: A wire or other core is enclosed by two concentric extruded layers, at least one of which is of crystallizable polymeric material, by extruding the layers in succession around but spaced from the core. The first and second layers are brought into thermal and mechanical engagement with each other before the first contacts the core, and the relative thermal capacities of the parts and the temperatures of the layers as they are brought into engagement are such that as the second layer cools and increases in strength and the first layer is heated by thermal transfer from the second layer and decreases in strength, a region of least overall yield strength is formed at a position where the temperature of at least one of the parts (being made of a crystallizable polymeric material) is at a temperature between its glass transition temperature and its crystalline melting point.

Abstract: An electrical cable for very high voltage underground power transmission comprises two or more inner conductors (2) which are twisted together and are supported within the gas-filled void of a hollow extruded plastic cable sheath (4) by means of a plurality of spacers (3) which are positioned along the length of the cable, each spacer (3) being formed of solid dielectric material with a number of angularly spaced radial webs equal to the number of conductors in the cable and being engaged with the twisted conductors with the webs extending from the cable axis radially outwardly between the conductors into contact with the inner wall of the cable sheath (4) where the outermost ends of the webs engage with complementarily shaped portions (5) of the sheath (4) providing for reduction of the electrical stresses at the spacer ends.

Abstract: Telecommunications cable formed by locating a plurality of conductors in a group in an open array, which is preferably planar, and shaping the group into arcuate configuration around a longitudinal axis with the conductors extending generally in the direction of the axis. A layer of insulation is then provided around the group to hold it in its planar configuration.

Abstract: A method and apparatus to apply pulp to a telecommunications conductor with an adhesive which is formed from acrylic resin solution. The solution is applied in a bath and is passed between wiping rolls with the feed speed of the conductor and the differential speed between the peripheral surfaces of the wiping rolls and the conductor being controlled together with the contact angle between the conductor and the rolls. This control results in a dried thickness of resin of no greater than 0.00015 inches and as little as 20 microns after further stages in the method. These steps include drying the solution in a solution drying oven, coating the adhesive with pulp and drying the pulp coated conductor.

Abstract: A tinned conductor is advanced through each of a plurality of successively smaller die openings in a drawing apparatus to reduce the diameter of the tinned conductor after which it is annealed. After the tinned conductor has been annealed, it is moved through the opening of a die which is slightly smaller than the final die opening in the drawing apparatus. This reconfigures any of the tin coating that may have reflowed during annealing and formed protrusions to remove any such protrusions and form an essentially smooth surface. As a result, the adhesion of a subsequently extruded plastic covering to the tinned conductor is controlled to be within a predetermined range and to be substantially uniform along the length of the conductor.

Abstract: A method is disclosed for substantially reducing shrink back of thermosetting materials from electrical cable. The method comprises reheating the cable, after curing of the thermosetting material and cooling of the cable, to a temperature below the melting point of the thermosetting material.