Fibrous Or Fabric Patents (Class 174/124R)
  • Patent number: 5989702
    Abstract: 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: Grant
    Filed: August 7, 1996
    Date of Patent: November 23, 1999
    Assignee: General Electric Canada Inc.
    Inventors: Robert Edward Draper, G. Paul Jones, Robert H. Rehder, Michael Stutt
  • Patent number: 5973269
    Abstract: An insulation system for the windings of a dynamoelectric machine is described wherein a bundle of insulated conductors is provided with layers of groundwall insulation. The innermost layer of groundwall insulation has superior corona discharge resistant properties. A second layer of groundwall insulation which has a corona discharge resistance somewhat less than the innermost layer of groundwall is superimposed on the innermost layer.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: October 26, 1999
    Assignee: General Electric Canada Inc.
    Inventors: Robert Edward Draper, Luc Jean Joseph Lafortune, Michael Beapre, Bernard John Moore
  • Patent number: 5824959
    Abstract: A flexible electric cable (1) has a conductor (2,3) and a fiber layer (4,5) of electrically conductive fibers which are in contact therewith. A cable of this type (1) is particularly suitable for electrical connection between two components that can move In relation to each other, one of which carries numerous activating elements, which may be controlled by voltage pulses. In this way, cables which are under stress through vibration, bending and tension stress, etc., can retain their function over a longer period.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: October 20, 1998
    Assignee: Karl Mayer Textilmachinenfabrik GmbH
    Inventors: Kresimir Mista, Hans Juergen Hoehne
  • Patent number: 5817974
    Abstract: A conductive fiber cloth including a conductive fibrous material and optionally a water-swellable material and/or a non-conductive, optionally reinforcing, fibrous material, is used as a cable wrapping. The water-swellable material is provided on and/or in the fiber cloth. The cable wrapping, provides conductance, shielding, or a combination of the two, in a cable.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: October 6, 1998
    Inventors: Dirk Albertus Bovenschen, Petrus Govardus Johannes Vogel, Rintsje Sybolt de Boer
  • Patent number: 5471014
    Abstract: An electrical conductor (100) is provided that is insulated with at least one layer of fibrous material (16') and has free-flowing powdered mica (8) disposed about an electrical conductor (2'). Insulated conductor (100) combines high temperature resistance with flexibility and is preferably made by a fluidized bed and/or electrostatic deposition or spray process.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: November 28, 1995
    Inventor: Edward A. Green
  • Patent number: 5468915
    Abstract: A fiberglass insulated conductor referenced by numeral (100) is provided for which at least one fiberglass layer (6') in close proximity to the electrical conductor (2) has been treated with a solution operative upon heat aging to render the treated fibers sufficiently frangible to break and eliminate stringing during the process of stripping the fiberglass from conductor (2). Another embodiment referenced by numeral (300) illustrates that one or both an electrically insulative tape or extruded layer (38) may be disposed intermediate the electrical conductor (36) and a surrounding fiberglass layer (40).
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: November 21, 1995
    Inventor: Edward A. Green
  • Patent number: 5444308
    Abstract: A device for charging PFLs (Pulse Forming Lines) on a time scale of a few nanoseconds. The device includes a source transmission line (STL) connected through a switch to a pulse forming transmission line. The source line is initially charged while the PFL is uncharged, and the switch is open. The impedance of the STL is larger than the impedance of the PFL. In operation when the switch is closed, energy flows from the source line to the PFL. As the energy and voltage build on the PFL, an output switch closes and delivers the energy of the PFL to the output transmission line section. The impedance of the output transmission line section is matched to the PFL impedance so that all of the energy in the PFL flows into the output section in the form of a pulse.
    Type: Grant
    Filed: June 4, 1993
    Date of Patent: August 22, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: James P. O'Loughlin
  • Patent number: 5414216
    Abstract: An electrostatographic reproduction machine wherein at least a portion of the wiring is formed from partially carbonized polyacrylonitrile filaments having a resistivity of between 1.times.10.sup.2 and 1.times.10.sup.10 ohm-cm. Preferably, the interconnects from the power source to the corona generating means are partially carbonized polyarylonitrile wires.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: May 9, 1995
    Assignee: Xerox Corporation
    Inventors: Joseph A. Swift, Stanley J. Wallace, Wilbur M. Peck
  • Patent number: 5254806
    Abstract: A magnet wire of modified cross-section is electrically insulated by adhering thereto an insulation tape which does not require a high temperature adherance step. The insulation tape has a pressure-sensitive adhesive coating which, prior to application to the magnet wire, is covered by a release strip. Just prior to application of the insulation tape to the magnet wire, the release strip is removed from the tape to uncover the adhesive coating and allow pressure-sensitive bonding of the insulation tape to the magnet wire.
    Type: Grant
    Filed: December 2, 1991
    Date of Patent: October 19, 1993
    Assignee: General Electric Co.
    Inventors: Steven Gross, John Hessler
  • Patent number: 4918325
    Abstract: A pulse sharpening circuit is disclosed for decreasing the current and voltage risetimes of pulse power devices. It is useful in many systems ranging from the particle beam fusion accelerator to field emission electron guns for intense microwave sources requiring an extremely quick high power turn-on for proper operation. A polyvinyl chloride dielectric flashover switch is used in combination with a velvet covered transmission line which has a metal ring near its end to produce switching when the initial radial electron flow is diverted to axial electron flow as the critical magnetic insulation current is exceeded. Nominal peak voltages of 500 Kv have been obtained with current and voltage risetimes of 0.5 nanoseconds.
    Type: Grant
    Filed: December 8, 1988
    Date of Patent: April 17, 1990
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Kenneth O. Busby, Richard J. Adler, Lynn M. Miner, Gerald F. Kiuttu
  • Patent number: 4819914
    Abstract: An electrical conducting rope for use on electric fencing of livestock with an inner core of stranded conductor cable and an outer insulating layer of braided synthetic fiber filaments. The inner core is formed of seven cable strands, each formed of seven twisted galvanized wires. The outer layer is formed of a braid of multiple polyester filament carriers. The carriers have contrasting colors to provide high visibility of the electric fence. A standard electric fence charger connected to the inner conductor core provides electric shocks to livestock contacting the outer insulating layer. The outer layer may have gaps in the braiding to expose the inner conducting core below the surface of the outer layer.
    Type: Grant
    Filed: January 12, 1987
    Date of Patent: April 11, 1989
    Assignee: All Line, Inc.
    Inventor: Richard A. Moore
  • Patent number: 4754195
    Abstract: To improve the high-voltage flash-over characteristics of high-pressure dharge lamps (1), and especially to prevent flash-over between terminal leads emanating from the lamp bulb and extending into a lamp base (14), the lamp base which is formed with a cup-shaped opening (13) has an insert pad (18) placed therein of fibrous web, pile, fleece or mat material, made of ceramic, quartz or glass fibers. In manufacture, the fibers are compressed, thereby fitting tightly against the terminal end, typically a pinch or press seal, of the discharge lamp bulb, and thereby substantially increasing the high voltage flash-over resistance between the terminal leads and permitting hot re-ignition of the lamp, which may require pulses of between 15 to 20 kV.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: June 28, 1988
    Assignee: Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
    Inventors: Erhard Rasch, Jurgen Heider, Werner Eisele
  • Patent number: 4627995
    Abstract: There is disclosed fiberglass insulation for use in insulating a pipe elbow, the insulation comprises a continuous strand of a plurality of removably connected fiberglass wraps, each of said wraps comprises a pair of opposed ends having essentially the same width and a mid-section between the opposed ends having opposed arcuate sides wherein the width of the mid-section measured at any point along the opposed arcuate sides is greater than the width of the opposed ends. Also included as part of the present invention are the individual wraps which comprise the continuous strand of fiberglass insulation.
    Type: Grant
    Filed: June 14, 1985
    Date of Patent: December 9, 1986
    Assignee: Carol Botsolas
    Inventor: Chris J. Botsolas
  • Patent number: 4598018
    Abstract: An electrical wire for use in high temperature applications made by providing refractory fibers that are larger than one micron in diameter and made of nonmetallic mineral material that has a melting point greater than 1200.degree. F., and applying the fibers and a binder to an electrically conductive core, to form an insulating coating around the core.
    Type: Grant
    Filed: September 19, 1984
    Date of Patent: July 1, 1986
    Assignee: Galileo Electro-Optics Corp.
    Inventor: Clinton J. Beuscher
  • Patent number: 4458107
    Abstract: According to the method, a strip of nonconductive, fibrous material having a capillary effect with respect to water is fixed in close contact with each conductor of the transmission line. The capillary effect of the fibrous material ensures the formation of thin filaments of water on the surface of the conductor when the same is wet. These filaments of water promote the generation of a corona effect in the form of permanent discharges resulting in a luminescent phenomena and inhibit the occurrence of pulsatory discharges. A conductor for aerial, high voltage, electric power transmission line which allows the above method to be carried out, is also disclosed.
    Type: Grant
    Filed: December 3, 1981
    Date of Patent: July 3, 1984
    Assignee: Hydro Quebec
    Inventor: Paul Heroux
  • Patent number: 4425474
    Abstract: A cable of this invention includes a number of pulp-insulated conductor pairs per unit of cable cross-sectional area which is substantially greater than in prior art cables. Each pulp-insulated conductor includes a metallic conductor enclosed in a composite insulation cover which has a controlled dielectric constant and a controlled adhesion of the cover to the conductor. The composite cover comprises a pulpous material and a layer of adhesive material which is interposed between the conductor and the pulpous material. The layer of the adhesive material bonds the pulpous material to the conductor and allows a reduced thickness of pulpous material without degrading the transmission characteristics of the cable. Also, the mechanical integrity of the insulation cover permits the moisture content of the pulpous material to be reduced and the density increased over that achieved in prior art pulp-insulated conductors without causing bare spots in the insulation.
    Type: Grant
    Filed: October 27, 1981
    Date of Patent: January 10, 1984
    Assignee: Western Electric Company, Inc.
    Inventors: Helmut E. Durr, Charles B. Heard, Jr.
  • Patent number: 4402789
    Abstract: Provision of a protective cover for a fibrous layer of insulation on a conductor by forming an inner layer of the protection cover by depositing a polymeric based composition without creating a crushing effect, and then, in tandem, hardening the inner layer and applying a second coat by extrusion. The inner layer absorbs the crushing forces of extrusion to protect the fibrous layer during addition of the second layer. The inner layer is preferably formed by electrostatic deposition coating and prevents pinhole formation in the second layer.
    Type: Grant
    Filed: September 18, 1981
    Date of Patent: September 6, 1983
    Assignee: Northern Telecom Limited
    Inventor: Gavriel L. Vexler
  • Patent number: 4375009
    Abstract: An electrical cable having a shielding comprised of knit or knit-graded wire having metal coatings.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: February 22, 1983
    Assignee: Hewlett-Packard Company
    Inventors: James T. Fearnside, Thomas P. Stephens
  • Patent number: 4341923
    Abstract: 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: Grant
    Filed: October 14, 1980
    Date of Patent: July 27, 1982
    Assignee: General Electric Company
    Inventor: Benjamin F. Allen
  • Patent number: 4312260
    Abstract: 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: Grant
    Filed: September 10, 1979
    Date of Patent: January 26, 1982
    Assignee: Rhone-Poulenc-Textile
    Inventor: Gilbert Morieras
  • Patent number: 4256807
    Abstract: A pulp insulated electric communications conductor in which the wood pulp fibers of the insulation are coated with an aqueous based cationic deposition aid polymer and then an aqueous based anionic latex polymer. In a process for applying a layer of insulating material to the conductor a slurry of wood pulp fibers is prepared to which first an aqueous based cationic deposition aid polymer is added and then an aqueous based anionic latex polymer is added, the resultant coated wood pulp fibers being applied to the conductor.
    Type: Grant
    Filed: August 23, 1979
    Date of Patent: March 17, 1981
    Assignee: Northern Telecom Limited
    Inventors: John A. Jukes, Thomas C. Pound, Wayne A. Cascarano
  • Patent number: 4125645
    Abstract: A pulp insulated electric communications conductor in which the wood pulp fibers of the insulation are coated with an aqueous cationic deposition aid polymer and then an aqueous based anionic latex polymer. In a process for applying a layer of insulating material to the conductor a slurry of wood pulp fibers is prepared to which first an aqueous based cationic deposition aid polymer is added and then an aqueous based anionic latex polymer is added, the resultant coated wood pulp fibers being applied to the conductor.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: November 14, 1978
    Assignee: Northern Telecom Limited
    Inventors: John A. Jukes, Thomas C. Pound, Wayne A. Cascarano
  • Patent number: 4084065
    Abstract: A yarn or fiber is incorporated into the jacket of a long suspended small ameter cable for reducing low velocity current cable strumming in water. The yarn or fiber comprises at least one-quarter of the strands of a braided cable. A nap or mossy cable effect is produced when the jacket is brushed.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: April 11, 1978
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Richard C. Swenson
  • Patent number: 4069410
    Abstract: A heat treating appliance coilable about steel piping for heating it before or relieving stresses in it after welding comprises an elongate reticulate sleeve of interlaced heat and oxidation wire having lengths of electrical heating cable each doubled back along itself and fixed inside and along the sleeve so as to form cable legs spaced apart in the sleeve and having terminal portions extending outside it, from respective openings near one end thereof, for connection with a current source. The sleeve has end portions extending beyond the cables therein, and each bent back upon itself into a loop, for securing the appliance in place on the structure to be heat treated.
    Type: Grant
    Filed: February 12, 1976
    Date of Patent: January 17, 1978
    Inventor: Henry Keep, Jr.