WO1994017534A1 - Cable resistant a l'ecrasement et a courbure reduite - Google Patents

Cable resistant a l'ecrasement et a courbure reduite Download PDF

Info

Publication number
WO1994017534A1
WO1994017534A1 PCT/US1993/001586 US9301586W WO9417534A1 WO 1994017534 A1 WO1994017534 A1 WO 1994017534A1 US 9301586 W US9301586 W US 9301586W WO 9417534 A1 WO9417534 A1 WO 9417534A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
insulation
core
crush
spiralled
Prior art date
Application number
PCT/US1993/001586
Other languages
English (en)
Inventor
Alfredo L. Cedrone
Original Assignee
W.L. Gore & Associates, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by W.L. Gore & Associates, Inc. filed Critical W.L. Gore & Associates, Inc.
Publication of WO1994017534A1 publication Critical patent/WO1994017534A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation
    • H01B7/0233—Cables with a predominant gas dielectric
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/443—Protective covering
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/4471—Terminating devices ; Cable clamps
    • G02B6/4478—Bending relief means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
    • H01B11/1834—Construction of the insulation between the conductors
    • H01B11/1856—Discontinuous insulation

Definitions

  • the invention pertains to cables which are internally crush- resistant and also have limited bend features.
  • Ruggedization of coaxial electrical cables has been provided by an external armor sheath, such as that disclosed in U.S. Patent 4,731,502, or internal spiralled rigid metal wire in the case of U.S. Patent 5,061,823.
  • Such structures also provide a high degree of bend radius limitation as well as crush-resistance.
  • Crush-resistance and some limitation to bending of a cable may also be supplied by a helically slit spiral of hard polymer tubing housed within the structure of the cable, such as shown in U.S. Patent 5,138,684, for protecting and isolating signal cables, optical fibers, hydraulic lines, and pneumatic gas lines.
  • the cable of the invention can provide desirable properties of crush-resistance and limited bend characteristics to cables of all the above types of structure along with lightweight and overall low dielectric constant.
  • the invention comprises a limited bend crush-resistant cable in which a signal carrying elongated core is surrounded by a spiralled layer of dielectric insulation which has indentations spaced along the outer surface so that the spaced apart edges of the spirals of insulation are configured to contact adjacent bands of insulation when the core of the cable is bent.
  • the edges of the spirals of insulation are spaced apart specified distances so as to limit the bend of the cable by their contact with each other.
  • the edges are configured by milling an insulation which surrounds a core to the desired shape or by extruding an insulation of the desired configuration around the core in a spiral pattern.
  • the core of the cable may be an electrically conductive wire, optionally having already formed on it a layer of insulation, a fiber optic cable, including buffering and other protective layers surrounding an optical fiber, or a dielectric microwave waveguide, which may have protective layers already applied to it.
  • edges of the spiralled insulation of the cable may be undercut in some cases in order to provide for the maximum content of air within the cable to provide as low a dielectric constant for the cable as possible.
  • any solid, porous, or foamed plastic dielectric material may be used as the spiralled insulation of the cable which can be milled or extruded to the configuration desired. Otherwise unusable polymers of high dielectric constant may therefore be usable in the invention since the overall dielectric constant can be lowered b the air included between the spirals of polymer.
  • Figure 1 is a side view with cross-section of an electrical wire form of cable core surrounded by spiralled insulation.
  • Figure 2A is a cross-sectional view of a signal carrying core surrounded by spiralled insulation.
  • Figure 2B is a cross-sectional view of the core of Figure 2A after bending.
  • Figure 3 is a cross-sectional view of a cable of the invention in which the core is a wire surrounded by porous insulation housed within the spiralled insulation and the spiralled insulation surrounded in turn by conductive shielding and a protective jacket.
  • Figure 4 depicts an alternate configuration of the spirals of the insulation.
  • Figure 1 depicts a side view of a cable of the invention along with a cross-sectional view of the same cable.
  • Cable core ⁇ is surrounded by a spiralled layer 3 of insulation which is divided into strips or bands of insulation 3 separated by grooves 2.
  • cable core I is shown as an electrically conductive metal wire. This arrangement of core ⁇ and insulation 3 may be applied as well where core 1 comprises a bare, buffered, or insulated optical fiber, a microwave waveguide, or a coaxial electrical signal cable.
  • a suitable optical fiber is often coated with a cladding and a soft buffering layer and/or a hard polymer protective layer, such as disclosed in U.S. Patents 4,072,400, 3,980,390, 4,768,860, 4,681,400, 4,798,445, 5,002,359, 4,307,938, and 4,465,336, for example.
  • Dielectric waveguides such as the type listed above may also be used as cable core 1.
  • Useful polymers for forming the spiralled, grooved insulation 3 may include those polymers commonly thought of as useful in the insulation art, including polyethylene, polypropylene, polytetrafluoroethylene (PTFE), polyvinyl chloride, urethane, rubber, and fluorinated hydrocarbon polymers and copolymers, for example.
  • Particularly useful are foamed thermoplastic polymers and porous expanded PTFE, such as that disclosed in U.S. Patents 3,953,566, 3,962,153, 4,096,227, 4,187,390, 4,902,423, and 4,478,665, assigned to W. L.
  • FIGS. 2A and 2B display cross-sectional views of slices of a cable of the invention which show how the edges 4. of the spiralled bands of insulation 3_ come into contact with each other when the cable of Figure 2A is bent to the configuration of Figure 2B. This contact, with the bend limitation resulting therefrom, would occur for any cable of the invention at some angle of bend ⁇ 5 regardless of what sort of core 1 might be used in the cable. Angle ⁇ 5 can be predetermined by proper spacing and considering the insulation properties of the spiralled bands of insulation 3. Bend limitation will occur from this source regardless of any shielding or jacketing layers covering the insulation in alternative forms of the cable of the invention.
  • FIG. 3 An alternative form of cable of the invention is shown in cross-section in Figure 3 wherein Ms a metal wire, 2 is the space between spirals of insulation 3 and undercut edges 4 of that insulation, 6 is a porous insulation to aid in control of the overall dielectric constant of the cable, 7 is a metallic shielding to render the cable coaxial, and 8 is a protective jacket surrounding the cable to protect it against the outside environment, such as weather.
  • Expanded PTFE may serve as an excellent example of a suitable insulation for that purpose.
  • Shielding 7 may be metal foil, metal coated polymer tape, or metal wire or tape braiding, for example.
  • Jacket 8 may be polyvinyl chloride, rubber, urethane rubber, a thermoplastic fluorocarbon, or polyolefin, for example.
  • Such a cable as shown in Figure 3 is adaptable to use with other electrical cables, optical fibers, and microwave transmitting dielectric waveguides as well as the insulated wire shown as 1 with insulation 6.
  • Figure 4 shows a cross-sectional example of differently contoured spirals 3 of insulation which are undercut to maximize the air space 2 between sp ' irals 3 and which have firm smoothly contoured edges 4 to the spirals for effective contact with adjacent spirals of the insulation to provide strong bend limitation to the cable.
  • Figures 5 and 5A describe another alternative configuration of spiralled insulationj, in a cross-sectional example wherein spirals _3_of insulation are straight-sided and closely spaced.
  • the cables of the invention thus advantageously greatly reduce the amount of dielectric insulation and metal needed for both bend- limitation and crush-resistance to provide very small very lightweight cables of superior properties for their size and weight.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)

Abstract

Câble résistant à l'écrasement et à courbure réduite, adaptble soit à un câble pour signaux électriques, à un guide d'ondes diélectriques transmettant les micro-ondes, soit à des âmes de fibres optiques de transmission de signaux. On confère à ce câble une teneur élevée en air, une constante diélectrique faible, une résistance à l'écrasement et une courbure réduite en enroulant de manière hélicoïdale un élément d'isolation autour de l'âme, laquelle présente un entrefer entre les spires de l'isolation afin de conférer au câble une résistance à toute courbure supplémentaire.
PCT/US1993/001586 1993-01-19 1993-02-24 Cable resistant a l'ecrasement et a courbure reduite WO1994017534A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US633293A 1993-01-19 1993-01-19
US08/006,332 1993-01-19

Publications (1)

Publication Number Publication Date
WO1994017534A1 true WO1994017534A1 (fr) 1994-08-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/001586 WO1994017534A1 (fr) 1993-01-19 1993-02-24 Cable resistant a l'ecrasement et a courbure reduite

Country Status (1)

Country Link
WO (1) WO1994017534A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7560646B2 (en) 2007-05-31 2009-07-14 Nexans Profiled insulation and method for making the same
US20130064495A1 (en) * 2011-09-12 2013-03-14 Tyco Electronics Corporation Bend-limited flexible optical interconnect device for signal distribution
CN103363285A (zh) * 2012-03-27 2013-10-23 纬创资通股份有限公司 保护装置
US9146374B2 (en) 2012-09-28 2015-09-29 Adc Telecommunications, Inc. Rapid deployment packaging for optical fiber
US9223094B2 (en) 2012-10-05 2015-12-29 Tyco Electronics Nederland Bv Flexible optical circuit, cassettes, and methods
US9417418B2 (en) 2011-09-12 2016-08-16 Commscope Technologies Llc Flexible lensed optical interconnect device for signal distribution
US9435975B2 (en) 2013-03-15 2016-09-06 Commscope Technologies Llc Modular high density telecommunications frame and chassis system
US9488788B2 (en) 2012-09-28 2016-11-08 Commscope Technologies Llc Fiber optic cassette
US9535229B2 (en) 2011-10-07 2017-01-03 Commscope Technologies Llc Fiber optic cassette, system, and method
EP3058403A4 (fr) * 2013-10-16 2017-06-14 Certicable, Inc. Ensemble souple blindé à fibre optique
DE102016224415A1 (de) * 2016-12-08 2018-06-14 Leoni Kabel Gmbh Leitung und Verfahren zur Herstellung einer solchen
US10705306B2 (en) 2016-09-08 2020-07-07 CommScope Connectivity Belgium BVBA Telecommunications distribution elements
US11409068B2 (en) 2017-10-02 2022-08-09 Commscope Technologies Llc Fiber optic circuit and preparation method
US11467347B2 (en) 2012-09-28 2022-10-11 Commscope Connectivity Uk Limited Manufacture and testing of fiber optic cassette

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018977A (en) * 1975-08-04 1977-04-19 Amp Incorporated High voltage cable with air dielectric
GB2080970A (en) * 1980-07-24 1982-02-10 Post Office Optical fibre cable

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018977A (en) * 1975-08-04 1977-04-19 Amp Incorporated High voltage cable with air dielectric
GB2080970A (en) * 1980-07-24 1982-02-10 Post Office Optical fibre cable

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 7, no. 130 (P-202)7 June 1983 *

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7560646B2 (en) 2007-05-31 2009-07-14 Nexans Profiled insulation and method for making the same
US10782483B2 (en) 2011-09-12 2020-09-22 Commscope Technologies Llc Flexible lensed optical interconnect device for signal distribution
US10620382B2 (en) 2011-09-12 2020-04-14 Commscope Technologies Llc Bend-limited flexible optical interconnect device for signal distribution
US10031295B2 (en) 2011-09-12 2018-07-24 Commscope Technologies Llc Flexible lensed optical interconnect device for signal distribution
US11372165B2 (en) 2011-09-12 2022-06-28 Commscope Technologies Llc Flexible lensed optical interconnect device for signal distribution
US9229172B2 (en) * 2011-09-12 2016-01-05 Commscope Technologies Llc Bend-limited flexible optical interconnect device for signal distribution
US9417418B2 (en) 2011-09-12 2016-08-16 Commscope Technologies Llc Flexible lensed optical interconnect device for signal distribution
US10067295B2 (en) * 2011-09-12 2018-09-04 Commscope Technologies Llc Bend-limited flexible optical interconnect device for signal distribution
US20130064495A1 (en) * 2011-09-12 2013-03-14 Tyco Electronics Corporation Bend-limited flexible optical interconnect device for signal distribution
US10451809B2 (en) 2011-09-12 2019-10-22 Commscope Technologies Llc Flexible lensed optical interconnect device for signal distribution
US9535229B2 (en) 2011-10-07 2017-01-03 Commscope Technologies Llc Fiber optic cassette, system, and method
US10578821B2 (en) 2011-10-07 2020-03-03 Commscope Technologies Llc Fiber optic cassette, system, and method
US11061197B2 (en) 2011-10-07 2021-07-13 Commscope Technologies Llc Fiber optic cassette, system, and method
US9952400B2 (en) 2011-10-07 2018-04-24 Commscope Technologies Llc Fiber optic cassette, system, and method
US11561356B2 (en) 2011-10-07 2023-01-24 Commscope Technologies Llc Fiber optic cassette, system, and method
CN103363285A (zh) * 2012-03-27 2013-10-23 纬创资通股份有限公司 保护装置
US10295761B2 (en) 2012-09-28 2019-05-21 Commscope Technologies Llc Fiber optic cassette
US11592628B2 (en) 2012-09-28 2023-02-28 Commscope Technologies Llc Fiber optic cassette
US12019277B2 (en) 2012-09-28 2024-06-25 Commscope Technologies Llc Manufacture and testing of fiber optic cassette
US9927591B2 (en) 2012-09-28 2018-03-27 Commscope Technologies Llc Rapid deployment packaging for optical fiber
US9897767B2 (en) 2012-09-28 2018-02-20 Commscope Technologies Llc Fiber optic cassette
US11036012B2 (en) 2012-09-28 2021-06-15 Commscope Technologies Llc Fiber optic cassette
US9470869B2 (en) 2012-09-28 2016-10-18 Commscope Technologies Llc Rapid deployment packaging for optical fiber
US10739534B2 (en) 2012-09-28 2020-08-11 Commscope Technologies Llc Fiber optic cassette
US11467347B2 (en) 2012-09-28 2022-10-11 Commscope Connectivity Uk Limited Manufacture and testing of fiber optic cassette
US9146374B2 (en) 2012-09-28 2015-09-29 Adc Telecommunications, Inc. Rapid deployment packaging for optical fiber
US9488788B2 (en) 2012-09-28 2016-11-08 Commscope Technologies Llc Fiber optic cassette
US11573389B2 (en) 2012-10-05 2023-02-07 Commscope Asia Holdings B.V. Flexible optical circuit, cassettes, and methods
US9223094B2 (en) 2012-10-05 2015-12-29 Tyco Electronics Nederland Bv Flexible optical circuit, cassettes, and methods
US9874711B2 (en) 2012-10-05 2018-01-23 Commscope Asia Holdings B.V. Flexible optical circuit, cassettes, and methods
US10955633B2 (en) 2012-10-05 2021-03-23 Commscope Asia Holdings B.V. Flexible optical circuit, cassettes, and methods
US10317638B2 (en) 2012-10-05 2019-06-11 Commscope Asia Holdings B.V. Flexible optical circuit, cassettes, and methods
US10473875B2 (en) 2013-03-15 2019-11-12 Commscope Technologies Llc Modular high density telecommunications frame and chassis system
US9435975B2 (en) 2013-03-15 2016-09-06 Commscope Technologies Llc Modular high density telecommunications frame and chassis system
US9952398B2 (en) 2013-03-15 2018-04-24 Commscope Technologies Llc Modular high density telecommunications frame and chassis system
EP3058403A4 (fr) * 2013-10-16 2017-06-14 Certicable, Inc. Ensemble souple blindé à fibre optique
US11340416B2 (en) 2016-09-08 2022-05-24 CommScope Connectivity Belgium BVBA Telecommunications distribution elements
US10705306B2 (en) 2016-09-08 2020-07-07 CommScope Connectivity Belgium BVBA Telecommunications distribution elements
US11846820B2 (en) 2016-09-08 2023-12-19 CommScope Connectivity Belgium BVBA Telecommunications distribution elements
US10483021B2 (en) 2016-12-08 2019-11-19 Leoni Kabel Gmbh Cable with a carbonized insulator and method for producing such a cable
DE102016224415A1 (de) * 2016-12-08 2018-06-14 Leoni Kabel Gmbh Leitung und Verfahren zur Herstellung einer solchen
US11409068B2 (en) 2017-10-02 2022-08-09 Commscope Technologies Llc Fiber optic circuit and preparation method
US11609400B2 (en) 2017-10-02 2023-03-21 Commscope Technologies Llc Fiber optic circuit and preparation method

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