US3429984A - Self-supporting coaxial cable - Google Patents

Self-supporting coaxial cable Download PDF

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Publication number
US3429984A
US3429984A US633354A US3429984DA US3429984A US 3429984 A US3429984 A US 3429984A US 633354 A US633354 A US 633354A US 3429984D A US3429984D A US 3429984DA US 3429984 A US3429984 A US 3429984A
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US
United States
Prior art keywords
cable
dielectric
coaxial cable
permeable material
jacket
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US633354A
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English (en)
Inventor
Donald C Alexander
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thomas and Betts Holdings Inc
Original Assignee
Deutsche ITT Industries GmbH
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 Deutsche ITT Industries GmbH filed Critical Deutsche ITT Industries GmbH
Application granted granted Critical
Publication of US3429984A publication Critical patent/US3429984A/en
Assigned to ITT CORPORATION reassignment ITT CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION
Assigned to FL INDUSTRIES, INC., A CORP. OF N.J. reassignment FL INDUSTRIES, INC., A CORP. OF N.J. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ITT CORPORATION, 320 PARK AVENUE, NEW YORK, NY 10022, A CORP. OF DE.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01B11/20—Cables having a multiplicity of coaxial lines
    • 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
    • H01B11/1891—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor comprising auxiliary conductors
    • 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
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/182—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments

Definitions

  • a coaxial cable includes an inner conductor surrounded by a first dielectric layer, a metallic shield around the first dielectric, a second dielectric layer around the shield, a permeable material around the second dielectric and an outer dielectric layer around the permeable material.
  • An adhesive is applied to the permeable material to provide a bond to the outer dielectric but does not prevent movement of the permeable material with respect to the second dielectric and other inner layers. The bond. strengthens the outer layer to provide a self-supporting structure while maintaining flexibility of the full cable.
  • Another pair of conductors parallel to the coaxial cable may be included within an adjoining portion of the outer dielectric with a web therebetween.
  • This invention relates to cables and particularly to a self-supporting combination coaxial cable-audio pair.
  • FIGURE 1 shows a cross-section transverse view of the cable structure of this invention.
  • FIGURE 2 shows a longitudinal view of the cable structure.
  • first portion 1 which is the coaxial section of the cable and a second portion 2 which comprises at least one telephone pair Which is the second portion of the combined cable.
  • the telephone pair is, of course, parallel to the coaxial cable.
  • the two portions which are enclosed within the same dielectric outer jacket are connected by a web 3 of the same dielectric.
  • the component portions of the coaxial cable section 1 comprise an inner conductor 4, a primary dielectric 5 surrounding the inner conductor which may be, for instance, polyethylene or any other suitable dielectric, a metallic shield 6 which constitutes the outer conductor of the coaxial cable and which may be made of tinned copper, for example, or any other suitable material; it may be braided or a tape wrapped longi tudinally or spirally.
  • the dielectric separator 7 Surrounding the shield 6 is a dielectric separator 7 and the preferred material, though not necessarily the only one suitable for this purpose, is Mylar (polyethylene terephthalate) which has both good dielectric properties and high strength.
  • the dielectric separator 7 may be in the form of a tape which is wrapped around the shield 6.
  • a permeable fibrous braid 8 of non-metallic material, preferably glass, is then disposed about the separator 7.
  • the telephone pair section of the cable comprises standard telephone wire which has two conductors 9, a primary dielectric 10 for each conductor and is disposed as a twisted pair. About the twisted pair is wound a dielectric tape or hinder 11 such as Mylar (polyethylene terephthalate).
  • An integral outer dielectric sheath 15 surrounds both the coaxial cable and the telephone pair. Both sections of the cable are joined by the web 3 which is integral with the two parts of the outer sheath 15.
  • the dielectric sheath 15 may be made of polyvinyl chloride, polyethylene, neoprene or any other suitable polymeric insulating material.
  • the braid 8 is treated so that it will adhere to the outer jacket 15 but will not adhere to the tape or separator 7 and in any flexing of the cable the outer sheath 15 with the fibrous braid attached thereto will move relative to the remainder of the cable.
  • the fibrous braid 8 which is preferably a glass braid is treated with an adhesive which may be a ketone solution of a synthetic rubber of the acrylonitrile/butadiene type compounded with conventional additives such as fillers, stabilizers, and antioxidants, and combined with a phenolic resin.
  • an adhesive is sold by the Angier Adhesive Division of Interchemical Corporation under the name SBS-404-l30 Tie- Coat.
  • the wire to be coated which is now complete with the exception of the outer jacket 15 is passed through a vessel containing the adhesive solution so as to cause the braid to become completely immersed in and to be impregnated with the adhesive solution. It is then drawn through a flexible orifice of a size to accommodate the wire but still elfect a wiping action of the wire so as to remove excess adhesive solution. The wire so treated is then passed through a heated chamber at a temperature of 200300 F. to remove the solvent and leave as a coating on the fibrous braid the solid portion of the adhesive solution.
  • the nature of the adhesive is such that when so dried and subsequently cooled to room temperature, it has only a slight tackiness and does not block or cause sticking of adjacent layers of wire on a spool.
  • the hot plastic jacketing material 15 is applied over the adhesive coated wire it causes the development of an adhesive bond between the jacket material and the adhesive coated fibrous substrate 8.
  • the fibrous substrate 8, however, is not bonded to the separator 7; therefore, in any flexing of the cable the bonded substrate 8 and outer jacket 15 is able to slide over the separator 7.
  • the effect of bonding the fibrous substrate 8 to the jacket material is to provide suflicient strength for selfsupport of the cable without the necessity of an outer strength member.
  • the fibrous substrate 8 is a strength member and by bonding it to the jacket 15 there is a transfer of the substrate strength to the jacket. Without bonding to the fibrous substrate the jacket alone would not be a strength member and when subjected to longitudinal pull it would stretch and slide off the core.
  • the high strength substrate firmly bonded to the jacket greatly reduces the jacket stretch but does not reduce cable flexibility.
  • the bonding of the substrate to the jacket creates a flexible, sag resistant tube with sufficient strength to self-support the cable when it is suspended between two points.
  • Another method of bonding the fibrous substrate to the outer jacket is to extrude or otherwise apply a thin layer of polyethylene over the fibrous substrate and then apply heat to soften or melt the polyethylene as it enters the extruding machine Where the jacket dielectric is extruded over the fibrous substrate, thereby firmly bonding the substrate to the neoprene.
  • a coaxial cable comprising an inner conductor, a dielectric surrounding said inner conductor, a metallic shield surrounding said dielectric, a dielectric separator surrounding said shield, a permeable material disposed about said dielectric separator, an outer dielectric layer surrounding said permeable material, and means disposed about said permeable material bonding said permeable material to said outer dielectric layer but not preventing movement of said permeable material and said outer dielectric layer about said dielectric separator.
  • a cable according to claim 1 wherein said permeable material is glass.
  • a cable according to claim 1 wherein said means disposed about said permeable material is an adhesive substance.
  • a cable according to claim 4 wherein said adhesive substance comprises a ketone solution of a synthetic rubber of the acrylonitrile/butadiene type combined with phenolic resin.
  • a cable according to claim 1 wherein said dielectric separator is polyethylene terephthalate.
  • a cable according to claim 1 wherein said means disposed about said permeable material is polyethylene.
  • a combination coaxial cable and audio pair comprising a coaxial portion and an audio pair portion disposed parallel to said first coaxial portion, said first coaxial portion comprising an inner conductor, a dielectric surroundin said inner conductor, a metallic shield surrounding said dielectric, a dielectric separator surrounding said shield, a permeable material disposed about said dielectric separator and an integral outer dielectric layer surrounding said permeable material and said audio pair, means disposed about said permeable material to cause said permeable material to adhere to said outer; dielectric layer but capable of movement about said dielectric separator.

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  • Communication Cables (AREA)
US633354A 1967-04-20 1967-04-20 Self-supporting coaxial cable Expired - Lifetime US3429984A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US63335467A 1967-04-20 1967-04-20

Publications (1)

Publication Number Publication Date
US3429984A true US3429984A (en) 1969-02-25

Family

ID=24539305

Family Applications (1)

Application Number Title Priority Date Filing Date
US633354A Expired - Lifetime US3429984A (en) 1967-04-20 1967-04-20 Self-supporting coaxial cable

Country Status (7)

Country Link
US (1) US3429984A (en:Method)
BE (1) BE713997A (en:Method)
CH (1) CH474817A (en:Method)
ES (1) ES352919A1 (en:Method)
FR (1) FR1561687A (en:Method)
GB (1) GB1165106A (en:Method)
NL (1) NL6805617A (en:Method)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3794752A (en) * 1973-05-30 1974-02-26 Anaconda Co High voltage cable system free from metallic shielding
US4675475A (en) * 1984-05-02 1987-06-23 Ericsson, Inc. Electrical cable with reinforcement
US5304739A (en) * 1991-12-19 1994-04-19 Klug Reja B High energy coaxial cable for use in pulsed high energy systems
US20050150679A1 (en) * 2003-03-17 2005-07-14 Nexans Abrasion-resistant jacket
US20060160402A1 (en) * 2004-12-29 2006-07-20 Kowalski Wayne J Power limited circuit cable for plenum applications in a constant current lighting system
EP2077566A1 (en) * 2008-01-02 2009-07-08 Jess-Link Products Co., Ltd Power cable assembly
US20100218970A1 (en) * 2009-02-27 2010-09-02 Hitachi Cable, Ltd. Cable
US20130306348A1 (en) * 2012-05-18 2013-11-21 Schlumberger Technology Corporation Artificial Lift Equipment Power Cables
US20170231125A1 (en) * 2014-08-12 2017-08-10 Tatsuta Electric Wire & Cable Co., Ltd. Shield wire

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1462527A (en) * 1973-03-08 1977-01-26 Aeg Telefunken Kabelwerke Cable with tension resistant plastics packet

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956613A (en) * 1957-07-05 1960-10-18 Westinghouse Electric Corp Treated glass cloth insulation making
US3328510A (en) * 1965-03-22 1967-06-27 Chillicothe Telephone Company Combination telephone and co-axial conduit means

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956613A (en) * 1957-07-05 1960-10-18 Westinghouse Electric Corp Treated glass cloth insulation making
US3328510A (en) * 1965-03-22 1967-06-27 Chillicothe Telephone Company Combination telephone and co-axial conduit means

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3794752A (en) * 1973-05-30 1974-02-26 Anaconda Co High voltage cable system free from metallic shielding
US4675475A (en) * 1984-05-02 1987-06-23 Ericsson, Inc. Electrical cable with reinforcement
US5304739A (en) * 1991-12-19 1994-04-19 Klug Reja B High energy coaxial cable for use in pulsed high energy systems
US20050150679A1 (en) * 2003-03-17 2005-07-14 Nexans Abrasion-resistant jacket
US7164078B2 (en) * 2003-03-17 2007-01-16 Nexans Abrasion-resistant jacket
US20060160402A1 (en) * 2004-12-29 2006-07-20 Kowalski Wayne J Power limited circuit cable for plenum applications in a constant current lighting system
EP2077566A1 (en) * 2008-01-02 2009-07-08 Jess-Link Products Co., Ltd Power cable assembly
US20100218970A1 (en) * 2009-02-27 2010-09-02 Hitachi Cable, Ltd. Cable
US8530745B2 (en) * 2009-02-27 2013-09-10 Hitachi Cable, Ltd. Cable including elemental wires with different angles
US20130306348A1 (en) * 2012-05-18 2013-11-21 Schlumberger Technology Corporation Artificial Lift Equipment Power Cables
US9336929B2 (en) * 2012-05-18 2016-05-10 Schlumberger Technology Corporation Artificial lift equipment power cables
US20170231125A1 (en) * 2014-08-12 2017-08-10 Tatsuta Electric Wire & Cable Co., Ltd. Shield wire
US9918417B2 (en) * 2014-08-12 2018-03-13 Tatsuta Electric Wire & Cable Co., Ltd. Shield wire

Also Published As

Publication number Publication date
FR1561687A (en:Method) 1969-03-28
ES352919A1 (es) 1969-08-01
CH474817A (de) 1969-06-30
BE713997A (en:Method) 1968-10-22
GB1165106A (en) 1969-09-24
NL6805617A (en:Method) 1968-10-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ITT CORPORATION

Free format text: CHANGE OF NAME;ASSIGNOR:INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION;REEL/FRAME:004389/0606

Effective date: 19831122

AS Assignment

Owner name: FL INDUSTRIES, INC., 220 SUTH ORANGE AVENUE, LIVIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ITT CORPORATION, 320 PARK AVENUE, NEW YORK, NY 10022, ACORP. OF DE.;REEL/FRAME:004453/0578

Effective date: 19850629