Conduit Or Cable Structure Patents (Class 174/34)
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Patent number: 7188642Abstract: A pull tape for facilitating positioning of elongated items within a protective sleeve is disclosed. The pull tape is woven of filamentary members preferably using a twill or satin weave that allows floats to form on the surface of the tape that reduce friction between the tape and the sleeve when the tape is drawn through the sleeve. Preferably, the tape is formed of multifilament warp and weft yarns woven in a plain weave with additional monofilament yarns arranged in the warp direction and woven in a twill or satin weave to form the floats in the warp direction. Additional embodiments include tapes having warp members entirely of monofilaments, as well as both warp and weft members being entirely of monofilaments.Type: GrantFiled: February 22, 2005Date of Patent: March 13, 2007Assignee: Federal Mogul World Wide, Inc.Inventors: Benjamin B. James, Angela L. Baer
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Patent number: 7166804Abstract: The present invention provides a terminal structure of a superconducting cable including a cable core having a superconducting shield layer and an electrical insulation layer. The superconducting shield layer has a radially outer portion provided with by a connection electrode and the superconducting shield layer and the connection electrode are connected together with a low melting solder. The connection electrode has a ground wire connected thereto to ground the superconducting shield layer. For a multiphase cable including a plurality of cable cores, connection electrodes are linked by a conductive coupling member to short circuit superconducting shield layers. The superconducting shield layer can be grounded without impaired insulating property of the electrical insulation layer.Type: GrantFiled: September 23, 2004Date of Patent: January 23, 2007Assignee: Sumitomo Electric Industries, Ltd.Inventors: Hiroyasu Yumura, Yoshihisa Takahashi, Kimiyoshi Matsuo, Shoichi Honjo, Tomoo Mimura
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Patent number: 7075010Abstract: A wire management system for mechanically protecting and electromagnetically shielding electrical conductors which extend along exposed surfaces of exterior or interior panels, walls, ceilings, floors of structures located in residential, commercial and industrial environments, may be constructed of one or more inner raceways and an outer raceway for containing the one or more inner raceways. The inner raceways may include a channel member having at least one wall that defines an interior space for receiving at least one electrical conductor, and a cover. A shield for reflecting electromagnetic radiation, may be disposed within the walls of the channel member and the cover.Type: GrantFiled: October 23, 2003Date of Patent: July 11, 2006Inventor: Albert Santelli, Jr.
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Patent number: 7060892Abstract: A method is provided for reducing the stray noise associated with the transmission of the electrical power between a power source and a target. The method includes the step of interconnecting the power source and the target with a conductor. A shield is positioned about the conductor to prevent electromagnetic and radio frequency interference from passing therethrough. A low impedance path is provided for the stray noise to travel between a neutral point of the power source and the isolated target.Type: GrantFiled: February 14, 2005Date of Patent: June 13, 2006Inventor: Robert H Whidden
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Patent number: 6886914Abstract: A flexible flat cable connects a drive circuit and a liquid jetting head to supply a drive signal to pressure generating elements. The flat cable includes a plurality of laminated layers, each provided with a plurality of first conductive patterns each connecting a positive pole of the drive circuit and a positive pole of one of the pressure generating elements, and a plurality of second conductive patterns each connecting a negative pole of the drive circuit and a negative pole of one of the pressure generating elements. Each of at least one of the first conductive patterns provided in one of the laminated layers faces one of the first conductive patterns provided in adjacent one of the laminated layers. Each of at least one of the second conductive patterns provided in one of the laminated layers faces one of the second conductive patterns provided in adjacent one of the laminated layers.Type: GrantFiled: October 4, 2002Date of Patent: May 3, 2005Assignee: Seiko Epson CorporationInventors: Goki Hiramoto, Tomoaki Takahashi
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Patent number: 6884935Abstract: A method is provided for reducing the stray noise associated with the transmission of the electrical power between a power source and a target. The method includes the step of interconnecting the power source and the target with a conductor. A shield is positioned about the conductor to prevent electromagnetic and radio frequency interference from passing therethrough. A low impedance path is provided for the stray noise to travel between a neutral point of the power source and the isolated target.Type: GrantFiled: March 4, 2003Date of Patent: April 26, 2005Inventor: Robert H. Whidden
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Patent number: 6828943Abstract: A conventional method for giving reducing properties uses medication or medium and thus, a range in which the method can be utilized is limited, and there is apprehension that the method adversely affects the environment of ecological system. Further, an apparatus for giving reducing properties is large in scale, and there is an adverse possibility that the apparatus adversely affects other electronic equipment. It is an object of the present invention to solve these problems. A plurality of coaxial cables are arranged as radiators 3 in a form of comb teeth-like shape. Each of the coaxial cable has a predetermined length and a dielectric 3c between an internal conductor 3a and an external conductor 3b. The coaxial cables are connected to an oscillator in series for supplying high frequency alternating current.Type: GrantFiled: March 24, 2003Date of Patent: December 7, 2004Inventor: Katsuhiko Deguchi
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Patent number: 6683256Abstract: A structure of signal transmission line has a core portion, a middle material layer and a coating layer. The core portion includes at least one transmission medium enveloped with an insulation layer. The coating layer includes at least one layer. The middle material layer is provided between the core portion and the coating layer, and has at least a metallic-wire knitting layer and a paper wrapping layer.Type: GrantFiled: March 27, 2002Date of Patent: January 27, 2004Inventor: Ta-San Kao
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Patent number: 6630887Abstract: The invention encompasses an electrical apparatus. Such apparatus comprises a first substrate having first circuitry supported thereby. The first circuitry defines at least a portion of a radio frequency identification device. At least one first electrical node is supported by the substrate and in electrical connection with the first circuitry. The apparatus further comprises an input device comprising a second substrate and second circuitry on the second substrate. The second circuitry is in electrical communication with at least one second electrical node. Neither of the first nor second electrical nodes is a lead, and the second electrical node is adhered to the first electrical node to electrically connect the input device with the radio frequency identification device. The invention also encompasses a termite-sensing apparatus. Additionally, the invention encompasses methods of forming electrical apparatuses, and methods for sensing termites.Type: GrantFiled: January 8, 2001Date of Patent: October 7, 2003Assignee: Micron Technology, Inc.Inventor: Rickie C. Lake
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Patent number: 6506971Abstract: A method of designing a single- or a multi-phase electric cable for conducting current through insulated conductors and creating a weak external magnetic field, so as to obtain a cable wherein at least one of the above-mentioned conductors is assembled from two or more insulated sub-conductors connected in parallel, and wherein the sum of cross-sectional areas of the sub-conductors is equal to a design cross-sectional area of the conductor. The arrangement in the cable is such that each of the sub-conductors is adjacent to a conductor or a sub-conductor associated with either a different phase or a different current direction, and the sum of magnetic moments of magnetic dipoles formed from all currents passing through the cable is zero.Type: GrantFiled: November 5, 2001Date of Patent: January 14, 2003Assignee: The Israel Electric Corporation, Ltd.Inventors: Yosef Grach, Michael Erlitzki
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Universally adjustable wire and/or cable enclosure connector for wire and/or cable enclosure systems
Publication number: 20020179312Abstract: A connector for connecting elongated enclosures of a wire and/or cable enclosure system, includes: a manually bendable pleated body having first and second ends; a first coupling member extending from the first end of the body, for attaching one of the elongated enclosures to the connector; and a second coupling member extending from the second end of the body, for attaching another one of the elongated enclosures to the connector. The pleated body allows the connector to be manually bent from side-to-side and/or front-to-back, and/or be manually lengthened or shortened to provide a desired configuration.Type: ApplicationFiled: May 31, 2001Publication date: December 5, 2002Inventor: Albert Santelli -
Publication number: 20020179313Abstract: A cable connection structure is provided, which has circuit boards of an electronic apparatus connected to each other by a shielded cable for transmission of signals, which is capable of effectively suppressing radiated electromagnetic waves due to resonance from the shielded cable and the circuit boards in an inexpensive and simple manner. At least two connectors are provided on at least two circuit boards, respectively, and a shielded cable connects the circuit boards to each other via the connectors. The shielded cable has a shielding conductor as a covering.Type: ApplicationFiled: December 14, 2001Publication date: December 5, 2002Inventor: Koji Hirai
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Patent number: 6459592Abstract: A VLSI package assembly comprising a package substrate carrying thereon an IC chip, a mother board supporting thereon the package substrate, and a connection means for providing electric connection between the substrate and the mother board. The connections means has a high durability against stresses thereby to keep its electric connection even in the face of difference in thermal expansions appearing within the package substrate and mother board.Type: GrantFiled: October 12, 1999Date of Patent: October 1, 2002Assignee: Oki Electric Industry Co., Ltd.Inventor: Yasuhito Anzai
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Patent number: 6310286Abstract: A quad cable includes four conductors arranged as two differential pairs for carrying the differential signals TPA and TPB. Preferably, the quad cable is used to transmit data signals between devices within an IEEE 1394 network. The two differential conductor pairs are included, with filler material, within a braided inner shield. A shield separator is formed outside of the braided inner shield. A braided outer shield is formed outside of the shield separator. The shield separator provides electrical isolation between the inner and outer shields. A cable jacket is formed outside of the braided outer shield to encase the cable. Each end of the cable includes a cable connector having a plurality of pins for coupling to a receiving connector. The four conductors and the inner shield are each coupled to a respective pin within each cable connector. When coupled to a receiving connector, the outer shield is coupled to a housing of the connector.Type: GrantFiled: January 27, 1998Date of Patent: October 30, 2001Assignees: Sony Corporation, Sony Trans Com Inc.Inventors: Robert Vincent Troxel, Jay Edward Cardon, Loi Quang Ninh
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Patent number: 6297445Abstract: A communication line is disclosed which is able to reduce the difference in the signal propagation time between the wires of the twisted pair. A communication line of the present invention is achieved by cutting and exchanging a pair of wires at the middle point or plural points in the line, so that the positive connecting parts and the negative connecting parts formed by the above cutting and exchanging are equal in length.Type: GrantFiled: January 27, 1999Date of Patent: October 2, 2001Assignee: Fujikura, LTDInventors: Naoshi Yamada, Yoshiharu Unami
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Patent number: 6225556Abstract: A sheet for shielding a room, conductive cables, magnetic recording media, inside shield rooms and other objects, from the effects of a magnetic field. The sheet is used as a magnetic shield by wrapping it around the objects or areas which need shielding from the effects of a magnetic field. The sheet is composed of a flexible magnetic shielding sheet of less than 100 &mgr;m thick and is made from alloys which have magnetic shielding capability such as alloys of Fe—Ni series and the like. The Fe—Ni series alloy contains 30 to 85 wt % Ni and also at least either one kind of Mo or Cu in the content of less than 8 wt %. Other than these, alloys of Fe—Cr—Al series and Fe—Co—V series are included. The magnetic shielding sheet 1 may also include an adhesive layer, film, or paper, laminated on at least one surface of the sheet.Type: GrantFiled: September 12, 1997Date of Patent: May 1, 2001Assignee: Daido Tokushukou Kabushiki KaishaInventor: Akihiko Saito
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Patent number: 6143986Abstract: An enhanced electrical harness arrangement for an aircraft engine that is arranged to provide optimum protection of the electrical conductors from extreme thermal, EMI, vibration and chafing problems encountered in service. The harness arrangement provides a high degree of repairability thereby ensuring a long service life for the harness wile also minimizing the time required for necessary repairs to the electrical conductor terminals. A repair splice member has an electrical conductor bundle inserted through it and is spaced from a connection of the electrical conductor bundle to an aircraft gas turbine engine.Type: GrantFiled: April 17, 1998Date of Patent: November 7, 2000Assignee: Rohr, Inc.Inventors: John J. Anderson, Leslie Travis, Eric R. Balders
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Patent number: 5986207Abstract: An elongated element having at least one electrical and/or optical conductor, and at least one additional element allocated to the elongated element. This additional element has at least one function that stores messages and/or that processes messages.Type: GrantFiled: December 23, 1997Date of Patent: November 16, 1999Assignee: Siemens AktiengesellschaftInventor: Guenther Uhlenhuth
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Patent number: 5966056Abstract: Method and apparatus for enabling the transmission of high bandwidth analog and digital data over cable lengths of more than 1000 feet through low cost semishielded or unshielded four wire cable are disclosed. Three balanced mode signals are transmitted using four conductors. In this configuration, the components A+ and A- of a first balanced mode signal A are respectively carried on a first pair of conductors, the components B+ and B- of a second balanced mode signal B are respectively carried on a second pair of conductors, and the components C+ and C- of a third balanced mode signal C are respectively carried on a pair of conductors synthesized through the commonality of the first and second conductor pairs, respectively. Using this technique, a new additional virtual ground plane is created wherein signal energy can be transmitted without interfering or combining with the other signals being transmitted on the remaining conductor pairs.Type: GrantFiled: July 3, 1996Date of Patent: October 12, 1999Assignee: INT Labs, Inc.Inventor: Barry Thornton
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Patent number: 5952607Abstract: A cabling media which is suitable for data transmission with relatively low crosstalk includes a plurality of metallic conductors-pairs, each pair including two plastic insulated metallic conductors which are twisted together. The characterization of the twisting is important and relates to parameters such as twist length as well as core strand length/lay. More specifically, particular combinations of twist lengths and core strand length/lay are purposely selected for each insulated pair of the cable in order to achieve performance capabilities that significantly surpass those required under TIA/EIA-568A. In one particular embodiment of this invention, a cable comprises as its transmission media, four twisted pair of individually insulated conductors with each of the insulated conductors including a metallic conductor and an insulation cover which encloses the metallic conductor.Type: GrantFiled: January 31, 1997Date of Patent: September 14, 1999Assignee: Lucent Technologies Inc.Inventors: Harold Wayne Friesen, David R. Hawkins, Stephen Taylor Zerbs
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Patent number: 5945631Abstract: An IEEE 1394 cable includes two individually shielded twisted data pairs of wires, carrying differential signals TPA and TPB, and two power conductors, carrying power signals VP and VG. The two twisted data pairs of wires are each individually shielded by a braided shield. The cable also includes an overall braided shield and a no smoke, no halogen, flame retardant jacket. Preferably, the cable has a length of 4.5 meters and includes 26 gauge wire for the two twisted data pairs. Longer, alternate embodiments of the cable incorporate heavier gauge wire for the two twisted data pairs. Preferably, the gauge wire used for the two power conductors is constant for the different lengths of cable. An active disconnect is used to provide an active repeater between IEEE 1394 cables. The active disconnect provides ports, into which cables are connected, and a physical connection including electronics necessary to form an active node on the IEEE 1394 serial bus.Type: GrantFiled: September 16, 1996Date of Patent: August 31, 1999Assignees: Sony Corporation, Sony Electronics, Inc.Inventors: Gregory K. Henrikson, Robert Troxel, Loi Ninh
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Patent number: 5834697Abstract: A communication cable includes at least a first and a second twisted pairs of conductors. The first twisted pair of conductors is covered by a first insulation material, and the second twisted pair of conductors is covered by a second insulation material that is different than the first insulation material. The second twisted pair of conductors has a signal phase delay that is substantially equal to the signal phase delay of the first twisted pair of conductors such that the skew of the cable is substantially zero. In certain embodiments, the first insulation material is a fluoropolymer. In such embodiments, the second insulation material may be a nonfluoropolymer. In addition, the twist lay of the first twisted pair of conductors may be different than the twist lay of the second twisted pair of conductors. Moreover, the thickness of the first insulation material may be different than the thickness of the second insulation material.Type: GrantFiled: August 1, 1996Date of Patent: November 10, 1998Assignee: Cable Design Technologies, Inc.Inventors: James Baker, Joseph Dellagala
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Patent number: 5789710Abstract: A reduce cross-talk wiring harness and method for accomplishing same. The wiring harness is used for routing signals from a bus and tag housing to a controller, and for routing signals back from the controller to terminators in the bus and tag housing. The harness includes an input pair and an output pair of bus and tag ribbon cables. The cables in each pair are of essentially the same length. Each pair has a combined bus and tag connector attached to one end, and individual bus and tag connectors attached to the other end. The input and output bus and tag ribbon cables are grouped together for at least part of the distance between the controller and the bus and tag housing in such a manner that at least one of both bus cables or both tag cables are adjacent one another, to reduce cross-talk between the bus cable of one cable pair and the tag cable of the other cable pair.Type: GrantFiled: August 23, 1994Date of Patent: August 4, 1998Assignee: EMC CorporationInventor: Greg Vanderpoel
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Patent number: 5777417Abstract: Winding bars of AC machines include a multiplicity of mutually electrically insulated conductor elements, which are transposed according to the Roebel principle. The conductor elements in the two end clip sections and in the active part section are transposed with one another.In order to achieve virtually perfect field compensation in the winding overhang, the conductor elements in the two end clip sections have a transposition of between 60.degree. and 120.degree.. In the active part section, either an incomplete transposition is provided, i.e. the transposition in the active part section is uniform and less than 360.degree., or, given a complete 360.degree. transposition in the active part section a void, i.e. a nontransposed section, is provided in the center of the active part, while the transposition in the active part section outside this nontransposed section is a uniform 180.degree. transposition.Type: GrantFiled: November 14, 1996Date of Patent: July 7, 1998Assignee: Asea Brown Boveri AGInventor: Johann Haldemann
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Patent number: 5760516Abstract: The stator winding of an electrical machine comprises conductor elements which are spaced apart from one another, are electrically insulated from one another and are surrounded over their entire length by common main insulation. The cavities, which are caused by the arrangement on both bar narrow sides of the conductor elements and the main insulation, are filled with an electrically semiconductive compound which, for its part, is covered by an electrically semiconductive strip. In order to provide a smooth bar surface, the electrically semiconductive strip is composed of a fiber-reinforced plastic, which has incisions on alternate sides of the narrow sides of the conductor bar oriented transversely with respect to the bar's longitudinal direction; these incisions are deeper than half the strip width and have a cut width which is on the order of magnitude of the strip thickness.Type: GrantFiled: November 18, 1996Date of Patent: June 2, 1998Assignee: Asea Brown Boveri AGInventors: Thomas Baumann, Jorg Oesterheld
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Patent number: 5744757Abstract: A plenum cable having a plurality of twisted pair conductors enclosed by a jacket. A plurality of the twisted pair conductors has one insulating material thereon and at least one twisted pair conductor has a different insulation material thereon. In the preferred structure at least one twisted-pair conductor has flame retardant polyethylene or flame retardant polypropylene insulation and at least one other twisted pair conductor being insulated with fluorinated ethylene propylene, tetrafluoroethylene, or ethylenechloro-trifluoroethylene. The preferred twisted pair conductors have a center-to-center distance along any point of a 1000 ft. twisted pair conductor that is .+-.0.3 of an average center-to-center distance and/or have an impedance of 90 to 110 ohms and a variation of .+-.0.Type: GrantFiled: May 3, 1996Date of Patent: April 28, 1998Assignee: Belden Wire & Cable CompanyInventors: Robert D. Kenny, Douglas O'Brien
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Patent number: 5740198Abstract: A cable used for transmitting the signals of a communications bus, such as a SCSI bus, having arbitration control signals subject to a wired-or glitch--such as the SCSI BSY signal. Low characteristic impedence conductors ensure that voltage reflections resulting from the deassertion of the BSY signal do not exceed a minimum threshold signal assertion voltage, allowing an increase in the maximum length of the SCSI bus cable.Type: GrantFiled: June 17, 1994Date of Patent: April 14, 1998Assignee: Digital Equipment CorporationInventor: William E. Ham
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Patent number: 5618185Abstract: A connector for communications systems includes four input terminals and four output terminals in ordered arrays. A circuit electrically couples respective input and output terminals and cancels crosstalk induced across adjacent connector terminals. The circuit includes four conductive paths between the respective input and output terminals. Sections of two adjacent paths are in close proximity and cross each other between the input and output terminal. At least two of the paths have sets of vias connected in series between the input and output terminals. The sets of vias are adjacent.Type: GrantFiled: March 15, 1995Date of Patent: April 8, 1997Assignee: Hubbell IncorporatedInventor: Robert A. Aekins
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Patent number: 5596169Abstract: A cable for connecting a peripheral device to an input/output port configured in accordance with either a SCSI protocol or a parallel port protocol has a first connector which has a plurality of contact pins for connecting the cable to the peripheral device; a second connector which has a plurality of contact pins for connecting the cable to the input/output port; and a plurality of twisted pairs each having a first conductor and a second conductor. The first conductor of each of the twisted pairs is a data/control line, and the second conductor of the twisted pair is a return for the respective data/control line in accordance with the SCSI protocol. The first and second conductors of each of the twisted pairs are connected between selected pins of the first and second connectors such that none of the twisted pairs carries a data/control signal on both its first and second conductors when the cable is connected to an input/output port that is configured in accordance with the parallel port protocol.Type: GrantFiled: May 12, 1995Date of Patent: January 21, 1997Assignee: Iomega CorporationInventors: William P. Baker, Charles Hamilton
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Patent number: 5548082Abstract: A signal shielding structure for a cable, such as an audio cable, employs 1) a shielding sheath which is electrically insulated from and encloses the signal-carrying conductors in the cable and 2) one or two discrete inductors electrically coupled between selected discrete points of termination on the shielding sheath and selected ground points to provide a d.c. signal path to ground and to inhibit ground termination of r.f. signals. The shielding sheath floats and is preferably everywhere electrically isolated from direct-wire connection with all grounds and all signal sources except for the connection through the inductor or inductors.Type: GrantFiled: November 22, 1994Date of Patent: August 20, 1996Inventor: Donald E. Palmer
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Patent number: 5541361Abstract: A cable for use within customer premises that effectively extends outside plant service to within the building. The cable has first and second core assemblies preferably formed of flame resistant material completely isolated from each other and surrounded by a shielding member having a rough FIG. 8 configuration. Each of the cores is completely enclosed within the loops formed by the shielding member and completely isolated from the other core. The shielding member is surrounded by a preferably flame resistant outer jacket.Type: GrantFiled: December 20, 1994Date of Patent: July 30, 1996Assignee: AT&T Corp.Inventors: Harold W. Friesen, Philip N. Gardner, Thomas M. Wolterman
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Patent number: 5527996Abstract: A cable used for transmitting the signals of a communications bus, such as a SCSI bus, having arbitration control signals subject to a wired-or glitch--such as the SCSI BSY signal. High propagation speed conductors increase the propagation speed of the BSY signal, resulting in a proportionate increase in the maximum length of the SCSI bus cable while maintaining adherence with the SCSI bus timing specifications.Type: GrantFiled: June 17, 1994Date of Patent: June 18, 1996Assignee: Digital Equipment CorporationInventor: William E. Ham
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Patent number: 5525757Abstract: An insulated conductor and the flame retardant insulation composition used in plenum cables. The insulation composition includes as a polyolefin blend from about 50 to 85 parts by weight of polypropylene, 10 to about 40 parts by weight of a very low density polyethylene and from about 5 to about 20 parts by weight of a high and/or low density polyethylene. To one hundred parts by weight of the polyolefin blend there is about 6 to about 20 parts by weight of a chlorinated flame retardant, from about 4 to about 12 parts by weight of a flame retardant intumescent, from about 20 to 60 parts by weight of a non-halogen flame retardant, from about 0.2 to about 1.0 parts by weight of hindered phenolic stabilizer; and from about 0.1 to about 0.4 parts by weight of additional stabilizers. One of the non-halogen flame retardants in the polyolefin composition, may be zinc borate which triggers polymer and flame retardant decomposition when the polyolefin composition is exposed to an igniting flame.Type: GrantFiled: March 15, 1995Date of Patent: June 11, 1996Assignee: Belden Wire & Cable Co.Inventor: Douglas D. O'Brien
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Patent number: 5521333Abstract: A four-core balanced transmission cable of the present invention includes four insulated electric wires, a low dielectric center interposition member having a diameter 0.35 to 0.45 times as great as an external diameter of the insulated electric wire, a pressing winding material for compressedly winding the four insulated electric wires and the center interposition member and a covering member for covering an external circumference of the pressing winding material. Accordingly, the four-core balanced transmission cable of the present invention is thin, soft and light so as to meet the standards or requirements for a cabling system of a computer.Type: GrantFiled: June 21, 1994Date of Patent: May 28, 1996Assignee: Sumitomo Electric Industries, Ltd.Inventors: Seie Kobayashi, Tetsuo Harada, Seiji Endo
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Patent number: 5519173Abstract: A high speed telecommunication cable includes at least one filler member having a plurality of twisted pair conductors disposed about the periphery thereof. Preferably, a plurality of twisted pair conductors are helically wound about each of two filler members and form a single layer about each filler member.Type: GrantFiled: June 30, 1994Date of Patent: May 21, 1996Assignee: Berk-Tek, Inc.Inventors: Kerry Newmoyer, Eric Lawrence
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Patent number: 5514837Abstract: A plenum cable having a plurality of insulated conductors enclosed by a jacket. Each of the insulated conductors or twisted-pair conductors has a dielectric constant that varies .+-.0.25 from any other insulated conductor or twisted-pair conductor. In the preferred structure at least one twisted-pair conductor has flame retardant polyethylene or flame retardant polypropylene insulation and at least one other twisted pair conductor being insulated with fluorinated ethylene propylene, tetrafluoroethylene, or ethylenechloro-trifluoroethylene.Type: GrantFiled: March 28, 1995Date of Patent: May 7, 1996Assignee: Belden Wire & Cable CompanyInventors: Robert D. Kenny, Douglas O'Brien
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Patent number: 5504273Abstract: In an electrical wiring system, a typical process for suppressing noise due to electric current consists in preparing a pair of flat circuit units comprising respectively an insulation layer and at least one circuit conductor therein or thereon which undulates to form wave-like patterns and in superposing fixedly said conductor of the first unit with that of the second unit in such that at least one insulation layer is interposed between the superposed conductors and whereby peaks of the second unit conductor face troughs of the first unit conductor; according to the invention, fixing is performed by means enabling to interweave said peaks with said troughs. One such means consists in providing the first flat circuit unit with trough-side slits and the second with peak-side slits and in inserting the tongues formed by the trough-side slits in the peak-side slits.Type: GrantFiled: October 24, 1994Date of Patent: April 2, 1996Assignee: Sumitomo Wiring Systems, Ltd.Inventor: Ryuji Nakanishi
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Patent number: 5493071Abstract: A communication cable includes a plurality of twisted pairs of electrical conductors, each electrical conductor being surrounded by a layer of plenum rated insulation. The cable also includes at least one additional twisted pair of electrical conductors, each electrical conductor thereof being surrounded by a layer of non-plenum rated insulation.Type: GrantFiled: November 10, 1994Date of Patent: February 20, 1996Assignee: Berk-Tek, Inc.Inventor: Kerry Newmoyer
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Patent number: 5486649Abstract: A shielded cable having in the core of the cable a plurality of conductors, a lateral shield having overlapping longitudinal ends surrounding the cable core. The shield has a thickness of up to about 6 mils. A helical groove formed in the shield, and an insulating jacket surrounding the shield.Type: GrantFiled: March 17, 1994Date of Patent: January 23, 1996Assignee: Belden Wire & Cable CompanyInventor: Galen M. Gareis
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Patent number: 5475185Abstract: A shielded cable is disclosed having metal coated aramid fibers as the shielding.Type: GrantFiled: April 1, 1992Date of Patent: December 12, 1995Assignee: E. I. Du Pont de Nemours and CompanyInventor: Edward W. Tokarsky
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Patent number: 5473113Abstract: The present invention features a shielded wire and cable article capable of meeting stringent aerospace specifications and requirements, particularly those pertaining to low weight and high temperature. The article generally consists of an inner conductive core of one or more wires that can be twisted or braided and which can be individually insulated. The conductive core is surrounded by one or more thin layer(s) of insulation about which the shielding of this invention is overlaid. The shielding is made of a woven, braided or served mesh or woven yarn of metal-coated high-performance fibers. The fibers of the mesh or yarn are characterized by high-tensile strength and flexibility and are operative at high temperatures, equal to or exceeding 150.degree. C. When the fibers themselves are braided, the resulting mesh can be braided even more tightly about the interior insulation surface than can conventional meshes.Type: GrantFiled: September 22, 1992Date of Patent: December 5, 1995Assignee: Champlain Cable CorporationInventor: Mahmoud Aldissi
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Patent number: 5471010Abstract: A radio frequency electrical connection (600) between a pair of electrical devices is formed by a pair of uninsulated bond wires (601, 603). The uninsulated bond wires (601, 603) are twisted in a manner such that the wires form a twisted pair but do not physically touch each other over the length of the twisted section.Type: GrantFiled: October 28, 1994Date of Patent: November 28, 1995Assignee: Motorola, Inc.Inventors: David E. Bockelman, Douglas H. Weisman
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Patent number: 5459284Abstract: A radio frequency electrical connection between a pair of electrical devices (101, 104) is formed by a pair of bond wires (102, 103) crossing (401) each other.Type: GrantFiled: September 1, 1994Date of Patent: October 17, 1995Assignee: Motorola, Inc.Inventors: David E. Bockelman, Douglas H. Weisman
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Patent number: 5424491Abstract: High frequency cable with short twist lays with the insulation thickness of conductors being different from that of others, the thickness of insulation being dependent upon twist lay length so as to achieve a desired characteristic impedance and signal attenuation.Type: GrantFiled: October 8, 1993Date of Patent: June 13, 1995Assignee: Northern Telecom LimitedInventors: Jorg-Hein Walling, Clement Gagnon, Paul P. Kish, Martin L. Belanger
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Patent number: 5401908Abstract: An insulated conductor pair includes a first insulated conductor including a first insulating material over more than half of an exterior surface of the first insulated conductor. The insulated conductor pair further includes a second insulated conductor including a second insulating material over more than half of an exterior surface of the second insulated conductor. The first and second insulating materials are distinguishable from one another.Type: GrantFiled: April 22, 1993Date of Patent: March 28, 1995Assignee: Cooper Industries, Inc.Inventor: Thomas L. Rodeghero
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Patent number: 5399813Abstract: This invention is directed to a high performance electrical telecommunication transmission cable, particularly for undercarpet applications. More precisely, this invention is directed to a low-profile, high performance flat cable, where the cable may be subjected to potentially damaging compressive forces from walking on an overlying carpet. The cable comprises a plurality of conductors arranged as plural sets of twisted pairs, with each conductor consisting of an inner conductive core surrounded by insulation, an outer dielectric member having plural longitudinally extending chambers, where each chamber includes two sets of the twisted pairs, spaced-apart and arranged in side-by-side fashion and generally parallel. The height of the chamber is dimensioned to exceed the wrap diameter of a set of a twisted pair of conductors.Type: GrantFiled: June 24, 1993Date of Patent: March 21, 1995Assignee: The Whitaker CorporationInventors: David B. McNeill, Jerry B. Kilpatrick
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Patent number: 5389735Abstract: A twisted-pair conductor line structure is formed on a substrate (22) having insulated conductive layers (31, 32). The conductive layers are used to form first, second, third, and fourth conductive planar segments (40, 41, 42, 43). A first conductive link (44) joins the first and second planar conductive segments to provide a first signal path. Similarly, a second conductive link (46) joins the third and fourth planar conductive segments to provide a second signal path. The first and second conductive links are operatively arranged to form a twist (17) in the first and second signal paths, such that the resulting magnetic fields (57, 59) around the twisted conductive segments will be opposite to each other for cancelling each other out, in order to reduce the magnetic field radiation to the surrounding environment.Type: GrantFiled: August 31, 1993Date of Patent: February 14, 1995Assignee: Motorola, Inc.Inventor: David E. Bockelman
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Patent number: 5369219Abstract: A multi-layer printed circuit board is disclosed as having more layers and greater accuracy in the conductive traces of those layers than has been previously possible. Using the disclosed multi-layer printed circuit boards can be built having a conductive path width of 0.5 mils (0.0127 mm) and spacing between such conductive traces of 0.5 mils (0.0127 mm). The method enables multi-layer boards to be created having more than eight layers, and still maintaining the desired 0.5 mil conductive path width and spacing. The enhanced accuracy and increased number of layers is made possible by use of adjustments to customer-supplied art work based upon evaluation of test pieces made early in the procedure. By use of the disclosed method, multi-layer printed circuit boards can he built having a high density of coaxial cable equivalents and tuned wave guide equivalents.Type: GrantFiled: February 10, 1993Date of Patent: November 29, 1994Assignee: Multimedia Design, Inc.Inventor: Robert Q. Kerns
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Patent number: 5357050Abstract: A method for defining traces on a multi-layer circuit board suppresses electro-magnetic emissions radiated from the traces. The defined traces carry a differential signal. Layers of signal and return trace pairs are formed. Each succeeding layer of traces is spaced above and follows the traces below, with the succeeding signal trace positioned above the preceding return trace and the succeeding return trace positioned above the preceding signal trace. All of the signal traces are conductively connected and all of the return traces are conductively connected. The symmetry of the arrangement causes the electro-magnetic fields generated by the conductors (traces) to cancel at any appreciable distance. Additionally, varying combinations of layers and/or varying parameters such as dimension, spacing and dielectric material, results in a desired impedance for matching to external cabling and the like.Type: GrantFiled: November 20, 1992Date of Patent: October 18, 1994Assignee: AST Research, Inc.Inventors: Jozef B. Baran, Edward D. Suski
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Patent number: RE37010Abstract: A communication cable includes a plurality of twisted pairs of electrical conductors, each electrical conductor being surrounded by a layer of plenum rated insulation. The cable also includes at least one additional twisted pair of electrical conductors, each electrical conductor thereof being surrounded by a layer of non-plenum rated insulation.Type: GrantFiled: August 22, 1996Date of Patent: January 9, 2001Assignee: Alcatel NA Cable Systems, Inc.Inventor: Kerry Newmoyer