Fibrous Or Fabric With Plastic Or Coating Materials Patents (Class 174/121R)
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Patent number: 6127632Abstract: A multiconductor electrical cable, for use in a subterranean wellbore, having which a plurality of electrical conductors, a jacket of insulation material, and a non-metallic armor. The non-metallic armor comprises one or more layers of extruded materials or an external wrapping of materials, selected from the group consisting of extruded thermoplastic materials, extruded thermoset materials, and fiber reinforced composite materials. The non-metallic armor eliminates corrosion problems associated with prior metallic armors, and provides significant weight savings over prior metallic armors.Type: GrantFiled: June 24, 1997Date of Patent: October 3, 2000Assignee: Camco International, Inc.Inventors: Howard A. Oswald, Grant T. Harris
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Patent number: 6051793Abstract: The invention provides a multiple parallel conductor for windings of electrical motors, including transformers, having individual insulated partial conductors with at least five partial conductors or transposed conductors. The multiple parallel conductor features a material that is partially wrapped about the individual insulated partial conductors for allowing cooling fluid to pass through the individual insulated partial conductors. The material is partially wrapped about the individual insulated partial conductors in a helical configuration. In one embodiment, the material is an aramid material such as Nomex.TM..Type: GrantFiled: May 22, 1998Date of Patent: April 18, 2000Assignees: Alcatel, VA TECH Ferranti-Packard Transformers LimitedInventors: Michael J. Byrne, Charles G. Clarkson
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Patent number: 6017627Abstract: Disclosed is a high voltage electric appliance comprising electric coils whose conductors are wrapped by an insulating tape with subsequent impregnation of thermosetting resin for the electrical insulation. The insulating tape is a laminated body consisting of a built-up mica of fine mica particles and synthetic pulp or a paraffin powder and a reinforcing member. The bonding among the fine mica particles and between the fine mica particles and the reinforcing material is effected by the synthetic pulp as melted and solidified.Type: GrantFiled: October 6, 1997Date of Patent: January 25, 2000Assignees: Kabushiki Kaisha Toshiba, Nippon Rika Kogyosho Co., Ltd.Inventors: Noriyuki Iwata, Kenji Sakayanagi
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Patent number: 6015954Abstract: The invention relates to a multi-layer ballistic cable protector in which additional fiber sheathing layers are replaced by hard, impact-resistant or impact-resistance modified plastic sheathing layers and, if desired, by further soft plastic damping layers.Type: GrantFiled: April 22, 1997Date of Patent: January 18, 2000Assignee: Ems-Inventa AGInventors: Martin Hochuli, Robert Dietrich
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Patent number: 5989702Abstract: A sandwich type insulation for electrical machinery comprising a laminate of a polymeric material such as polyimide which contains particles of an inorganic corona resistant material, said polymeric material being bonded to mica paper consisting of mica, wherein said mica paper may be impregnated with polymeric resin containing particles of inorganic corona resistant material. The resultant insulation may be used as a tape or wrapper.Type: GrantFiled: August 7, 1996Date of Patent: November 23, 1999Assignee: General Electric Canada Inc.Inventors: Robert Edward Draper, G. Paul Jones, Robert H. Rehder, Michael Stutt
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Patent number: 5864095Abstract: An abrasion-resistant fluoropolymer mixture comprising(A) from 75 to 99% by weight of a fluorocarbon polymer(B) from 1 to 25% by weight of an oxidized polyarylene sulfide and, based on the sum (A)+(B),(C) from 0 to 15% by weight of a filler,is used for the production of feed pipes for Bowden cables which are pressure-resistant and abrasion-resistant.Type: GrantFiled: December 11, 1997Date of Patent: January 26, 1999Assignee: Ticona GmbHInventors: Helmut Scheckenbach, Andreas Schleicher, Jurgen Kulpe, Wolfgang Neumann, Bernd Jansen
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Patent number: 5817982Abstract: A cable (100, 120) for transmitting electrical energy is constructed with a layer (104) of insulating and shielding material made up of pre-impregnated strands, for example glass strands (105), carrying a nonlinear dielectric material concentrically formed about an electrical conductor (102). A portion of the layer (104) is displaced by stranded material (116) pre-impregnated with a thermally conducting material to define a longitudinal heat distributing channel (114) along the cable (100, 120). The layer (104) of nonlinear dielectric material improves field control within the cable (100, 120) and also the temperature profile along the cable (100, 120), both of which improve performance and life expectancy. In addition, the electric field and the electromagnetic interference (EMI) around the cable (100, 120) are reduced. The longitudinal heat distributing channel (114) further improves the temperature profile along the cable (100, 120).Type: GrantFiled: April 26, 1996Date of Patent: October 6, 1998Assignee: Owens-Corning Fiberglas Technology Inc.Inventors: Panchadsaram Arumugasaamy, Thomas P. Hager
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Patent number: 5733823Abstract: There are provided a prepreg for a printed circuit board which comprises a glass cloth impregnated with a flame retardative resin composition comprising a (A) resin composed of a (a) styrenic polymer having syndiotactic configuration, a (b) polymer having compatibility with or affinity for the component (a) and further containing polar group, and a (c) thermoplastic resin other than the components (a) and (b) and/or a rubbery elastomer; a (B) halogenated polystyrene in which the amount of halogen atoms contained in halogen compounds generated under specific conditions is at most 1000 ppm by weight; a (C) flame retardant aid; an (D) organic filler or inorganic filler; and the above glass cloth, and also a substrate for printed circuit which comprises the prepreg or a laminate comprising a plurality of the prepregs laminated on each other, at least one side of the prepreg or laminate being laminated with a metallic layer.Type: GrantFiled: September 6, 1996Date of Patent: March 31, 1998Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Taizou Sugioka, Shinobu Yamao
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Patent number: 5705774Abstract: The disclosure herein describes a flame resistant electric cable which is capable of resisting flame temperatures in the neighborhood of 1000.degree. C. for at least two hours; the cable includes at least two electrical conductors each including an electrical wire, an extruded tubular member made of silicone surrounding the electrical wire, and an outer protective layer of braided inorganic material which surrounds the tubular member; the cable includes, underneath an overall outer braided jacket, an extruded elongate tubular member made of a silicone elastomer having a wall thickness of at least 0.030 of an inch.Type: GrantFiled: December 7, 1995Date of Patent: January 6, 1998Assignee: Harbour Industries (Canada) Ltd.Inventor: Mark Beauchamp
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Patent number: 5635677Abstract: A flat cable comprises a series of parallel electrical conductors (1 to 6) each carrying a spiral-wound tape insulation layer (30). The conductors are held together by braiding formed of a plurality of tapes (10 to 22) or fibres interwoven between the conductors. The braiding is preferably of a thermoplastic material which may be heat bonded to the insulation in order to set the cable in a desired shape e.g. for a wiring loom. The insulation and braiding is preferably formed from a mixture of polytetrafluoroethylene (PTFE) and a copolymer of tetrafluoroethylene and perfluoro(propylvinylether).Type: GrantFiled: November 25, 1994Date of Patent: June 3, 1997Assignee: W. L. Gore & Associates, Inc.Inventors: David Wood, David McNaughton, John N. Kippen, Andrea Gellan
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Patent number: 5633072Abstract: A process for manufacturing a multi-layer printed wire board, also referred to as a multilayer, comprising at least two electrically insulating substrates with electrically conductive traces or layers provided on at least three surfaces thereof, in which process, by means of lamination under pressure, a cured basic substrate based on a UD-reinforced synthetic material, provided on either side with traces, is combined with and bonded to a back-up substrate, wherein during the laminating process the back-up substrate is added to the basic substrate, the back-up substrate comprising a UD-reinforced cured core layer provided at least on the side facing the conducting traces of the basic substrate with a still plastically deformable (flowable) adhesive layer, and such a pressure is exerted on the laminate as to bring said cured core layer of the back-up substrate into contact or practically into contact with the conducting traces of the basic substrate, and the space between these traces is filled with the adhesivType: GrantFiled: June 7, 1995Date of Patent: May 27, 1997Assignee: Akzo Nobel N.V.Inventors: Erik Middelman, Pieter H. Zuuring
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Patent number: 5438164Abstract: A high temperature resistant insulated electrical conductor (100) is provided in which a electrostatically deposited layer (6) of fluorocarbon material is disposed about a fiberglass insulation layer (4) encompassing a stranded or solid electrical conductor (2). Layer (6) is surrounded by a layer (8) of fiberglass insulation which in turn is preferably encompassed by a braided layer (10) of fiberglass insulation which is preferably coated with a layer (2) of protective high service temperature material. Layer (6) is preferably sintered to provide a fused homogenous construction as is layer (12) when required.Type: GrantFiled: January 27, 1994Date of Patent: August 1, 1995Inventor: Edward A. Green
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Patent number: 5329605Abstract: A waterproofed, insulated conductor or cable and a method of fabricating the same using a new slushing compound is described. The waterproofed insulated conductor or cable includes a core with at least one conductor element, a polymeric insulation jacket, at least one textile covering over the polymeric jacket, and at least one waterproof coating on top of said at least one textile covering, the waterproof coating comprising a blend of from 15 to 40, preferably 20, weight percent of pine tar oil, the remainder being essentially natural (Trinidad) asphalt. The invention is especially suitable for fabricating armored cables in which armor wires, deposited on a textile yarn bedding, are embedded in a coating of the blend and further are covered by at least one textile yarn roving and a waterproof coating on top of each of said at least one waterproof coating.Type: GrantFiled: October 27, 1992Date of Patent: July 12, 1994Assignee: AT&T Bell LaboratoriesInventor: W. Bernard Wargotz
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Patent number: 5276759Abstract: This invention relates to flat cables comprising a plurality of insulated conductors bonded to a porous substrate. The porous substrate is impregnated with a polymeric material capable of bonding to the insulation of the conductors. The strength of the bond can be varied by varying the amount of the impregnant. If it is desired to separate one or more of the conductors from the substrate, for example to form a branch off, a minimum amount of impregnant can be used.Type: GrantFiled: January 9, 1992Date of Patent: January 4, 1994Assignee: Raychem CorporationInventors: Phu D. Nguyen, Ashok K. Mehan, Hans E. Lunk, James M. O'Brien
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Patent number: 5274196Abstract: An improved electrical insulation tape is formed from a sheet of fiberglass cloth having a layer of thermoplastic resin bonded thereto. The thermoplastic resin layer is applied to the fiberglass sheet by melting the resin while contacting the fiberglass, and then the composite is cooled to bond the two components together. The composite sheet is then slit into tapes with substantially no unraveling of the fiberglass component at the slit edges of the tapes. The resultant tapes are easily wrapped on, and adhered to, conductors, such as magnet wire, or the like, by remelting and resolidifying the thermoplastic layer. The tape possesses excellent dielectric properties and heat dissipation properties. Alternatively, the fiberglass sheet may be impregnated with the melted thermoplastic component whereby a composite, rather than a relatively definitive two layer laminate, is formed.Type: GrantFiled: May 4, 1992Date of Patent: December 28, 1993Inventor: Martin Weinberg
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Patent number: 5105057Abstract: Magnet wire is insulated with a paper insulation sheet which is longitudinally wrapped onto the wire. The paper sheet is precoated on one side with a layer of resinous adhesive dielectric material such as a thermoplastic polyester. The outside surface of the paper sheet has the resinous coating applied thereto and solidified prior to the time that the paper is wrapped onto the wire. Just prior to applying the paper to the wire, an edge of the resin coating is heated sufficiently to locally remelt the resin. The remelted edge is then overlapped by the opposite edge as the coated paper is wrapped onto the wire, whereby the edges of the insulation sheet are adhered together. The wrapped wire is then passed through one or more heated dies in order to remelt the entire resin coating, which remelted coating is then drawn back over the exterior of the paper layer. The wrapped wire is then passed through a water quench bath.Type: GrantFiled: May 20, 1991Date of Patent: April 14, 1992Inventor: Martin J. Weinberg
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Patent number: 5075514Abstract: An improved insulated thermocouple having no asbestos insulation material. The improved thermocouple and a method for making it are described whereby individual conductors are wrapped with high temperature fiberglass insulation and are then coated with a fiberglass binder that may be a modified silicone liquid. The individual conductors are then assembled in a parallel configuration and an outer jacket of high temperature fiberglass is applied by a braiding process. The entire assembly having the exposed outer jacket is coated with a fiberglass binder that may be a polyurethane liquid, and then cured.Type: GrantFiled: August 14, 1990Date of Patent: December 24, 1991Assignee: Thermex, Inc.Inventor: John B. Hurd
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Patent number: 5008495Abstract: An electric cable is disclosed that has improved burn resistance characteristics. The improved electric cable consists of an insulation portion that has a glass fiber yarn wrapped around the conductor. The glass fiber yarn is impregnated at an outer periphery by a first silicone mixture. A second silicone mixture is coated about the outer periphery of the glass fiber yarn. In an alternative embodiment, a silicone tape replaces the Fiberglas.TM. yarn. The improved insulation for electric cable is envisioned for use with both single strand and multi-strand wires.Type: GrantFiled: February 12, 1990Date of Patent: April 16, 1991Assignee: Lestox, Inc.Inventor: Donald Mudgett
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Patent number: 4994632Abstract: A paper-polymeric material, laminated tape, an electric cable insulated with such tape and a method of making the tape. The tape includes a film of polymeric material to at least one surface of which a paper tape comprising cellulose fibers is bonded by contacting the paper tape at room temperature with the film heated to a temperature above its melting temperature. Prior to contacting the paper tape with the heated film, fibrils are caused to project from at least one surface of the paper tape by subjecting it to a high voltage, electrostatic field. In the laminated tape, the fibrils are embedded in the material of the film to provide an improved bond between the film and the paper tape.Type: GrantFiled: October 19, 1989Date of Patent: February 19, 1991Assignee: Societa' Cavi Pirelli S.p.A.Inventors: Claudio Bosisio, Antonio Campana
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Patent number: 4910361Abstract: An electric cable is disclosed that has improved burn resistance characteristics. The improved electric cable consists of a insulation portion that has a glass fiber yarn wrapped around the conductor. The yarn is impregnated at an outer periphery by a first silicone compound. A second silicone compound is coated about the outer periphery of the glass fiber yarn. In an alternative embodiment, a silicone tape replaces the glass fiber yarn. The improved insulation for electric cable is envisioned for use with both single strand and multi-strand wires.Type: GrantFiled: March 29, 1989Date of Patent: March 20, 1990Assignee: Lestox Inc.Inventor: Donald Mudgett
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Patent number: 4810834Abstract: The disclosed communications cables have tensionproof jackets which consist of tensionproof and axial-compression-resistant tape and an outer plastic covering extruded over the tape. The tape includes lengthwise threads of aramid or glass, lengthwise threads of aramid- or glass-fiber-reinforced plastic or a liquid-crystal polymer, and cross threads of a different plastic material. It may be designed as a open-mesh tape. The tape has a longitudinal seam which may deviate in alternating direction from the longitudinal axis of the cable by a small angle to improve flexibility.Type: GrantFiled: November 19, 1987Date of Patent: March 7, 1989Assignee: Alcatel N.V.Inventors: Ferdinand Grogl, Wolfgang Schmidt
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Patent number: 4761520Abstract: Magnet wire substrates (1) are described having a layer of glass fiber (2) wrapped thereon, which has a layer of spirally wrapped and bonded polyester insulation tape (3) as the outermost layer. The resulting insulated magnet wire in addition to having the requisite electrical properties has improved physical properties including increased flexibility and ease of strippability.Type: GrantFiled: June 17, 1987Date of Patent: August 2, 1988Assignee: United Technologies CorporationInventors: Ivan W. Wade, Jr., John D. Hessler
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Patent number: 4710594Abstract: 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.Type: GrantFiled: June 23, 1986Date of Patent: December 1, 1987Assignee: Northern Telecom LimitedInventors: Jorg-Hein Walling, Jacques Cornibert, Gordon D. Baxter, Marie-Francoise Bottin, Oleg Axiuk, Phillip J. Reed
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Patent number: 4658089Abstract: An electrical cable for a submersible well pump has an internal fabric layer for providing additional hoop strength. The cable has a plurality of conductors. Each conductor is surrounded by an insulating layer that is permeable to gas. A woven fabric layer surrounds each insulating layer. An elastomeric jacket is extruded over and preferably bonded to each fabric layer. The jacket has flocked fibers to allow gas desorption while pulling the cable to the surface.Type: GrantFiled: May 28, 1985Date of Patent: April 14, 1987Assignee: Hughes Tool CompanyInventors: Raymond L. Guzy, Thomson H. Wallace
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Patent number: 4590025Abstract: The purpose of the invention is to manufacture varnish-bonded thread-covered circular-section and profile-section wires and braided conductors in a manner which is particularly cheap and which involves particularly little risk of contaminating the environment.Suitable thread-covered wires and braided conductors are obtained by impregnation, in one operation, with partially crystalline or amorphous thermoplastic polycondensates.Type: GrantFiled: April 16, 1985Date of Patent: May 20, 1986Assignee: Dr. Beck & Co. AktiengesellschaftInventors: Udo Reiter, Helmut Lehmann
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Patent number: 4567320Abstract: A reinforced insulated electrical cable and a method of forming the cable, which is especially useful in oil wells. The reinforcement comprises a thin tape of thermosetting material imbedded with an open-mesh fabric, the tape being spirally wrapped directly around the cable's insulation. The tape is wrapped in unvulcanized form and is then vulcanized in place over the insulation. The layer of open-mesh fabric is spaced from the outer surface of the insulation so that, during vulcanization, the insulation can radially outwardly expand without contacting and thus deforming the fabric, and at the same time the insulation can push part of the thermosetting material through the spaces in the fabric.Type: GrantFiled: April 26, 1983Date of Patent: January 28, 1986Assignee: Harvey Hubbell IncorporatedInventors: David H. Neuroth, Armand Moscovici
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Patent number: 4538024Abstract: Apparatus for manufacturing ribbon cable having a plurality of filamentous elements comprises a wheel having a circumferential surface interrupted by a plurality of parallel grooves in which the elements are seated over a common arc. Elements are supplied tangentially toward the wheel as the wheel is rotated and plastic is extruded at a point on the common arc to form a ribbon cable with elements exposed where they lay in the grooves. Elements are entrapped in cable by plastic bridges formed in lateral channels or recesses which interrupt the grooves and permit plastic to flow around elements, by fiber mat which the plastic impregnates, by melt-bonding to plastic insulated wire, by adhesive, or by nearly complete entrapment of elements resulting from a shallow groove profile. An additional layer of plastic may be extruded onto the cable so produced to yield a conventional fully insulated ribbon cable, or for some cable profiles the cable may be mated to like cable for a close centerline spacing of elements.Type: GrantFiled: April 9, 1984Date of Patent: August 27, 1985Assignee: AMP IncorporatedInventors: Joseph A. Wise, Michael P. Green
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Patent number: 4510348Abstract: A relatively small pair size cable (20) comprising at least one insulated conductor (22) is provided with a flame retardant, smoke suppressive non-metallic sheath system (30). The sheath system has a relatively low thermal conductivity and provides a predetermined delay prior to the thermal decomposition of the conductor insulation. It includes an inner layer (31) of an inorganic cellular material which has a relatively low air permeability and two tapes (41, 42) which are wrapped helically about the inner layer with overlapped sealed seams. Each tape comprises a flame retardant thermosetting material. In an alternative embodiment, the heat absorptivity of the sheath system is increased substantially to facilitate the sealing of the seams as the cable is moved along a manufacturing line. This may be accomplished by using an inorganic cellular material which has a relatively high absorptivity or by facing the inner layer or one of the tapes with a material which is heat absorptive.Type: GrantFiled: March 28, 1983Date of Patent: April 9, 1985Assignees: AT&T Technologies, Inc., AT&T Bell LaboratoriesInventors: Candido J. Arroyo, Nicholas J. Cogelia, Ralph J. Darsey
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Patent number: 4500748Abstract: Disclosed is a flame retardant electrical cable able to meet or exceed the flame spread requirements of Underwriters Laboratories Tunnel Flame UL 910 while minimizing or eliminating halogen, particularly fluorine content from the cable by utilizing a first non-fluocarbon polymer and compositions based thereupon for use in making one of the conductor insulation or the protective jacket of the cable and a second non-fluorocarbon polymer or fluorocarbon polymer which may be the same as or different from the first polymer and compositions based thereupon for use in making the other of the conductor insulation or the jacket of the cable where the first and second polymers and compositions based thereupon have a composite Steiner Index of: ##EQU1## where: S.I. is less than about 3500;mass is the respective number of pounds of the respective polymers included in the cable subjected to the UL 910 Test; andSteiner Index (S.I.) is (A)(B)(C)(1-0.I.Type: GrantFiled: April 8, 1983Date of Patent: February 19, 1985Assignee: Eaton CorporationInventor: Gary S. Klein
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Patent number: 4497537Abstract: In an electric and/or optical cable for use suspended under water at depths of at least 1,000 m or for direct burial in the ground, each core is surrounded by a water-impermeable barrier comprising a cushioning layer of elastomeric material and, a longitudinally applied, transversely folded metal tape carrying on its outer surface a plastics coating and an outer plastics sheath is bonded to the plastics coating of the water-impermeable barrier. The metal tape has a helically extending corrugation formed by winding around the folded tape, prior to application of the plastics sheath, a plastics coated terylene filament which is applied under such a tension as to form the helical corrugation and to cause elastomeric material of the cushioning layer to fill the trough of the helical corrugation in the inner surface of the folded tape, the plastics coating on the terylene filament being bonded to the plastics sheath.Type: GrantFiled: June 9, 1983Date of Patent: February 5, 1985Assignee: BICC Public Limited CompanyInventor: Godfrey R. M. Dench
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Patent number: 4484024Abstract: 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.Type: GrantFiled: February 15, 1984Date of Patent: November 20, 1984Assignee: Raychem CorporationInventor: William H. Bentley, Jr.
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Patent number: 4430384Abstract: A flame resistant insulated electrical wire and/or cable construction formed by wrapping a wire or cable conductor with a heat resistant flexible refractory tape comprising a porous base fabric, preferably a knit fiberglass fabric that has been coated and impregnated with refractory materials. These refractory materials are bonded to both the surface and interstices of the base fabric by means of a bonding agent, such that the fabric remains flexible and retains its stretch properties. In the presence of relatively extreme temperature and heat (e.g., above 1750.degree. F.), the bonding agent will decompose without flaming, while the refractory materials will fuse into the softened surface of the knit fiberglass base fabric forming a high temperature resistant structure with ceramic qualities and insulative properties.Type: GrantFiled: January 19, 1981Date of Patent: February 7, 1984Assignee: Subtex, Inc.Inventor: Stephen George
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Patent number: 4399191Abstract: A thin insulating sheet comprises an associated mica sheet containing 1 to 9 wt. % of a polymer fibril which is melt-bonded to a polymer film or a porous polymer sheet.Type: GrantFiled: January 28, 1982Date of Patent: August 16, 1983Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tadashi Iwabuchi, Osamu Hayashi
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Patent number: 4341923Abstract: An electrically insulating coating for transformer wire consists of an asbestos paper coated with a plurality of strips of resin material. The resin material provides strength and toughness to the asbestos as well as abrasion resistance to the coated wire to protect the asbestos material during the coil winding process.Type: GrantFiled: October 14, 1980Date of Patent: July 27, 1982Assignee: General Electric CompanyInventor: Benjamin F. Allen
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Patent number: 4312260Abstract: A flexible cable comprises a plurality of substantially parallel, textile core threads and an external sheath, in which cable cohesion is provided by a binder which is applied in a discontinuous manner to the threads to bond the core threads to one another to form a core. The same or additional binder is used to bond the core to the sheath. An electrical conductor element may be provided centrally of the core and the sheath preferably is braided in position about the core. In addition to the beneficial properties associated with totally impregnated cables, the cables of this invention possess a very high flexibility. These cables or ropes can be used for all applications in which flexibility and strength are the principally desired qualities including, for example, motorway crash barriers, oceanography, ballooning, and fixing floating stations in the sea.Type: GrantFiled: September 10, 1979Date of Patent: January 26, 1982Assignee: Rhone-Poulenc-TextileInventor: Gilbert Morieras
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Patent number: 4280015Abstract: An encased gas-insulated high-tension line is disclosed especially for regions of the line where disturbing arcs can occur so as to melt a grounding casing of the line. A heat and pressure resistant insulative layer prevents an escape of hot and possibly poisonous insulating gases from the casing in the event of a casing melting. The insulative layer is preferably made of an epoxy resin/glass fiber fabric and is wound around arc-endangered areas at fixed arc regions. An additional heat-resistant insertion may be included between the casing and the insulative layer.Type: GrantFiled: April 24, 1979Date of Patent: July 21, 1981Assignee: BBC Brown, Boveri & Company LimitedInventors: Franz Czech, George-Heinz Krieter
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Patent number: 4259544Abstract: An electric cable and in particular a coaxial cable, said cable having at least one conductor surrounded by electrical insulation and at least one longitudinal strength member formed by a cord of aromatic polyamide fibres, disposed parallel to the conductor or twisted in a helix therearound. Various kinds of cords are described: twisted; non-twisted; in one or in several layers; embedded in insulation or constituting the insulation.Type: GrantFiled: January 4, 1979Date of Patent: March 31, 1981Assignee: Societe Anonyme dite: Les Cables de LyonInventor: Andre Litauer
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Patent number: 4239998Abstract: A method for producing electrically insulated apparatus, which may be used in windings for rotary electric machines, for example, an induction motor, synchronous machines, DC machines or stationary induction apparatus, for example, transformers, and the product produced thereby comprising an electric conductor and an insulating layer formed around the electric conductor, wherein said insulating layer contains a resin having excellent permeability for the gas generated in the layer, e.g., a silicone resin, and a resin having excellent adhesive force in an appropriate blending ratio in order to impart excellent thermal resistance to the electrically insulated apparatus.Type: GrantFiled: March 14, 1978Date of Patent: December 16, 1980Assignee: Hitachi, Ltd.Inventors: Takeshi Hakamada, Hideyo Hirata, Toshio Katoh
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Patent number: 4131690Abstract: A method of producing an insulated electrical conductor, in which a wire conductor is coated with an inner layer of heat resistant material and covered with electrostatically deposited powdered polymeric material which is fused by heat to form an outer layer of insulation. An insulated electrical conductor produced by this method comprises a core carrying an inner coating of heat resistant material and an outer coating of fused polymeric material.Type: GrantFiled: May 5, 1975Date of Patent: December 26, 1978Assignee: Northern Electric Company LimitedInventors: John A. Jukes, Philip A. McGettigan
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Patent number: 4079191Abstract: Electrical wire and cable suitable for use in nuclear generating stations, having at least one electrical conductor, a micaceous insulating layer surrounding the conductor and a layer of fluoropolymer insulation surrounding the micaceous layer.Type: GrantFiled: July 7, 1975Date of Patent: March 14, 1978Assignee: Allied Chemical CorporationInventors: A. Bruce Robertson, Elmer C. Lupton, Jr.
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Patent number: 4051324Abstract: A radiation resistant cable is made by wrapping a barrier film over a conductor and covering it with a silicone saturated asbestos covering. The asbestos is passed through one or more dies to compact the asbestos covering and accurately size it. One or more layers of polyimide tape is wrapped about the asbestos. The polyimide tape is covered by a heat-sealable tape over which a fiberglass cover is braided. The cable is then heated to seal the heat-sealable tape to itself as well as to the adjacent layers. The cable is then passed through a coating bath to impregnate and saturate the fiberglass braid, following which the cable is heated to extract the solvent in the coating solution.Type: GrantFiled: May 12, 1975Date of Patent: September 27, 1977Assignee: Haveg Industries, Inc.Inventors: Robert W. Anderson, deceased, Robert E. Smith, Jr.
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Patent number: 4045611Abstract: A hermetic lead wire for use in conducting electricity to a motor in a hermetically sealed system such as a refrigeration system is formed with an electrically wound, laminated flexible foil tape surrounding an internal stranded conductor. The laminated tape is formed with an inner nonwoven fibrous layer of polyester fibers for interlocking with the conductor when melted by a hot stripping tool. An outer impervious foil layer of polyester on said laminated tape provides a dielectric shield for the wire. Preferably, the laminated tape is helically wound about the conductor and is covered with an outer flexible braided sheath of polyester filaments.Type: GrantFiled: September 30, 1975Date of Patent: August 30, 1977Assignee: Belden CorporationInventor: Duane E. Torgerson
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Patent number: 3987239Abstract: This disclosure deals with the minimization of electric stresses and the increase of breakdown-withstanding capabilities in DC insulation systems or conductivity, or conductance and resistance, within the insulation media. The stress is kept at a minimum by arranging the layers of insulations to follow a particular pattern based on conductivity constants of the material at its distance from the conductor.Type: GrantFiled: July 15, 1974Date of Patent: October 19, 1976Inventors: Shee-Ming Chen, Spyridon Armenis