US2220393A - Self-carrying cable - Google Patents

Self-carrying cable Download PDF

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Publication number
US2220393A
US2220393A US188795A US18879538A US2220393A US 2220393 A US2220393 A US 2220393A US 188795 A US188795 A US 188795A US 18879538 A US18879538 A US 18879538A US 2220393 A US2220393 A US 2220393A
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US
United States
Prior art keywords
cable
self
carrying cable
tape
carrying
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
US188795A
Inventor
Bylander Erland Cornelius
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to US188795A priority Critical patent/US2220393A/en
Application granted granted Critical
Publication of US2220393A publication Critical patent/US2220393A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01B7/22—Metal wires or tapes, e.g. made of steel
    • H01B7/221—Longitudinally placed metal wires or tapes
    • 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
    • H01B7/20—Metal tubes, e.g. lead sheaths
    • H01B7/204—Metal tubes, e.g. lead sheaths composed of lead

Definitions

  • the present invention relates to a leadsheathed electric aerial cable arranged for being stretched in free spans Without the use of a suspending wire.
  • a self-carrying cable of this kind 5 is previously known inV which a carrying Wire made of steel is impressed within the lead sheathing.
  • the invention has for its object to improve cables of said kind and consists essentially therein that the carrying wire is in the form of a l plane ilexible steel tape which is provided with at least one friction surface cooperating, in consequence of the lead sheath being pressed around the cable core, with the insulated conducting wires located in a plane.
  • the other side of the steel tape is designed to form a friction surface which may cooperate either with the lead sheath or with conducting wires arranged in a plane.
  • a self-carrying cable of great tensile strength comprising a planel flexible steel tape provided with two friction surfaces uniformly spread over substantially the Whole length of the tape, at least one pair of insulated conducting wires arranged at least closely to the one of the said friction surfaces of said tape and parallel to the same and a lead sheath closely pressed around said tape and said insulated conductors.

Description

NOV 5, 1940- E.' c. BYLANDER 2,229,393
SELF-CARRYING CABLE Filed, Feb. 4, 1938 Patented Nov. 5, 1940 PATENT OFFICE SELF-CARRYING CABLE Erland Cornelius Bylander, Sundbyherg, Sweden, assignmto Telefonaktiebolaget L. M. Ericsson,
Stockholm, Sweden Application February 4, 1938, Serial No. 188,795
1 Claim.
The present invention relates to a leadsheathed electric aerial cable arranged for being stretched in free spans Without the use of a suspending wire. A self-carrying cable of this kind 5 is previously known inV which a carrying Wire made of steel is impressed within the lead sheathing. The invention has for its object to improve cables of said kind and consists essentially therein that the carrying wire is in the form of a l plane ilexible steel tape which is provided with at least one friction surface cooperating, in consequence of the lead sheath being pressed around the cable core, with the insulated conducting wires located in a plane.
According to an embodiment of the invention, also the other side of the steel tape is designed to form a friction surface which may cooperate either with the lead sheath or with conducting wires arranged in a plane.
Through the invention that advantage is gained, as compared with known designs, that a high friction is obtained between the carrying member and the conducting wires as well as the lead sheath so as to avoid mutual displacement 25 between these parts of the cable. The cable is stretched by means of suitable tightening or clasping members which compress the cable at the ilxing points and further increase the friction between the different parts of the cable at 30 said points. Thus, oating or sliding of the lead sheath at the fixing points is not to be feared in case of a cable designed according to the present invention.
are then placed onto a flexible steel tape 4 which 10 has been endowed with two friction surfaces 5 and 6 by that the steel tape has been closely lwound with thin yarn 8. Another way of providing friction surfaces is to let the steel tape pass between toothed rollers. The steel tape and the wires are pressed together by means of a lead sheath l pressed around the two parts. Prior to covering the cable core with the lead sheath, the cotton tape and the other insulation are soaked with a suitable impregnating agent.
I claim: v
A self-carrying cable of great tensile strength, comprising a planel flexible steel tape provided with two friction surfaces uniformly spread over substantially the Whole length of the tape, at least one pair of insulated conducting wires arranged at least closely to the one of the said friction surfaces of said tape and parallel to the same and a lead sheath closely pressed around said tape and said insulated conductors.
ERLAND CORNELIUS BYLANDER.
US188795A 1938-02-04 1938-02-04 Self-carrying cable Expired - Lifetime US2220393A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US188795A US2220393A (en) 1938-02-04 1938-02-04 Self-carrying cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US188795A US2220393A (en) 1938-02-04 1938-02-04 Self-carrying cable

Publications (1)

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US2220393A true US2220393A (en) 1940-11-05

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Family Applications (1)

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US188795A Expired - Lifetime US2220393A (en) 1938-02-04 1938-02-04 Self-carrying cable

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US (1) US2220393A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4518830A (en) * 1982-06-25 1985-05-21 At&T Bell Laboratories Armored telephone cord with a longitudinal strength member
EP0305058A2 (en) * 1987-08-22 1989-03-01 LUCAS INDUSTRIES public limited company Cable harness
US4837815A (en) * 1986-06-26 1989-06-06 Nynex Corporation Armored cord handset
US4845774A (en) * 1986-10-06 1989-07-04 Raymond Arzounian Apparatus for anchoring a telephone handset to a telephone housing
USRE33647E (en) * 1986-10-06 1991-07-23 Apparatus for anchoring a telephone handset to a telephone housing
US5073682A (en) * 1990-08-09 1991-12-17 Northern Telecom Limited Telecommunications cable
US20130009018A1 (en) * 2011-07-10 2013-01-10 John Palahnuk Method of cable fabrication

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4518830A (en) * 1982-06-25 1985-05-21 At&T Bell Laboratories Armored telephone cord with a longitudinal strength member
US4837815A (en) * 1986-06-26 1989-06-06 Nynex Corporation Armored cord handset
US4845774A (en) * 1986-10-06 1989-07-04 Raymond Arzounian Apparatus for anchoring a telephone handset to a telephone housing
USRE33647E (en) * 1986-10-06 1991-07-23 Apparatus for anchoring a telephone handset to a telephone housing
EP0305058A2 (en) * 1987-08-22 1989-03-01 LUCAS INDUSTRIES public limited company Cable harness
EP0305058A3 (en) * 1987-08-22 1989-06-14 LUCAS INDUSTRIES public limited company Cable harness
US5073682A (en) * 1990-08-09 1991-12-17 Northern Telecom Limited Telecommunications cable
US20130009018A1 (en) * 2011-07-10 2013-01-10 John Palahnuk Method of cable fabrication

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