WO1994006126A1 - Cable electrique miniature - Google Patents

Cable electrique miniature Download PDF

Info

Publication number
WO1994006126A1
WO1994006126A1 PCT/US1992/007452 US9207452W WO9406126A1 WO 1994006126 A1 WO1994006126 A1 WO 1994006126A1 US 9207452 W US9207452 W US 9207452W WO 9406126 A1 WO9406126 A1 WO 9406126A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductive
electric cable
cable
tinsel
wire electric
Prior art date
Application number
PCT/US1992/007452
Other languages
English (en)
Inventor
Edwin R. Peterson
Edwin Lee Wheeler
Original Assignee
Preco New Products Corp.
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 Preco New Products Corp. filed Critical Preco New Products Corp.
Priority to AU26561/92A priority Critical patent/AU2656192A/en
Priority to PCT/US1992/007452 priority patent/WO1994006126A1/fr
Publication of WO1994006126A1 publication Critical patent/WO1994006126A1/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
    • H01B7/17—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
    • H01B7/1825—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring comprising synthetic filaments forming part of a high tensile strength core
    • 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
    • H01B7/0009—Details relating to the conductive cores
    • 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
    • H01B7/08—Flat or ribbon cables
    • H01B7/0823—Parallel wires, incorporated in a flat insulating profile

Definitions

  • This invention relates to a small size electric cable primarily for telephone, data and other signal transmissions where cable tensile strength, flexibility, and flat cable ductility are the major con- cerns.
  • Tinsel cables are used in applications where great flexi ⁇ bility for the cable is required.
  • they are constructed by spiral wrapping a tensile foil of conduc ⁇ tive material, usually copper or copper alloy, around a tensile filament or element, usually nylon or polyester.
  • the wire is then coated with a thermoplastic insulating material.
  • the required number of independent wires are then arranged in a ribbon and jacketed with a second plastic material to form a multi-wire, flexible cable, which can be subjected to repeated flexure without fatigu ⁇ ing the conductive tensile metal foil.
  • nylon and polyester filaments used in the past.
  • These aromatic polyamides have, in addition to high tensile strength, another favorable property over the older nylon and polyester filaments, namely they are relatively in ⁇ elastic.
  • Nylon and polyester tensile filaments are sub ⁇ ject to elongation factors of ten per-cent at strain forces of a mere 4 grams/denier (35 cN/Tex) and will break at force levels of approximately 8 grams per denier (70 cN/Tex) . These forces can be easily incurred in miniature cables by inadvertently tugging on the cable or, in a localized fashion, merely by folding and crimping the cable.
  • each of these wraps is, as taught in the prior art, wrapped in a helically spiral opposite to the other, that is to say, one in a clockwise direction, and the other in a counter ⁇ clockwise direction to solve the problem of maintaining good conductivity under conditions of tensile stretching in cables having nylon or polyester tensile filaments.
  • the opposing spiral design originally adopted to compensate for tensile stretching, has been carried over into the new non-elastic tensile filament cables using aromatic fibers. But this design has an inherent defect, in that if the cable is twisted, it will wrap the helical spiral of tinsel tighter in one direction, and unwrap the tinsel foil which was wrapped in the other direction.
  • a multiple wire electric cable containing at least two conductive wires held in parallel spaced relationship within a flexible thermal plastic jacket formed from the family of polyether amides.
  • Each of the conductive wires has a tensile ele ⁇ ment formed of a plurality of unbonded filaments of aramid fiber from the family of aromatic polyamides.
  • Spirally wrapped about each of the tensile filaments are at least two tinsel ribbons. Both tinsel ribbons are wrapped in the same direction, with one overlaying the other.
  • the conductive wires are placed into an array within the thermal plastic jacket in an orientation such that the spiral wraps of tinsel foil in each conductive wire is in an opposite direction, one conductive wire to another, so as to cancel out the twisting forces induced by the wraps of tinsel foil about the filaments.
  • Fig. 1 is a greatly enlarged cross sectional view of the cable.
  • Fig. 2 is a schematic view in side elevation illus ⁇ trating the method of manufacture of one of the conductors in the cable.
  • Fig. 3 is a cross-sectional view of one of the conduc ⁇ tors in Fig. 1.
  • Fig. 4 is a schematic top view illustrating the alter ⁇ nating pattern of setting of parallel conductors having opposing wraps of conductive foil.
  • FIG. 1 shows a greatly enlarged view of multiple wire electric cable 10 containing four parallel, spaced apart conductor wires 12 held within an extruded thermoplastic 22 to form a flexible multiple wire cable.
  • each conductor wire 12 has a tensile core 14 comprised of a plurality of separate unbonded filaments 16 around which is wrapped a first tinsel ribbon 18, and then wrapped in the same direction and overlaying first tinsel ribbon 18, a second tinsel ribbon 20 as shown in Fig. 2.
  • elec- trie cable 10 contains four conductor wires 12, however, it should be apparent that the principles taught herein are equally applicable to any flexible multiple wire cable.
  • Tensile filament core 14 of this conductor wire 12 is fabricated of a plurality of separate unbonded filaments 16 of an aramid fiber from the family of aromatic poly ⁇ amides.
  • this is preferably KEVLAR®, which is a registered trademark of the DuPont Corporation.
  • the aramid fibers are much less susceptible to elongation, suffering approximately 1% elongation at 4 grams/denier (35cN/Tex) and have a much higher resistance to breakage, at 22 grams/denier (194.2cN/Tex), which is almost three times stronger than that found in a conductor wire using conventional nylon tinsel filaments.
  • each of tensile cores 14 in four wire cable 10 has a cross-sectional area of 7.74 square millimeters.
  • the tinsel ribbons, 18 and 20, are 1% cadmium and 99% copper and are .05mm thick and .508mm wide, although other alloys of copper or other conductive materials may be used.
  • the preferred extruded insulating thermoplastic mate ⁇ rial 22 is a thermoplastic selected from the family of polyether amides, and this is preferably PEBAX®, which is a registered trademark of ATOCHEM, Inc. This is an ex ⁇ tremely flexible material.
  • each of the conductor wires 12 have a tensile strength of 40N to 44.5N, for a combined cable strength of 160N to 178N. This compares to a standard cable using a nylon tensile core of comparable size which would have a tensile strength of only between 53N to 67N. While first and second tinsel ribbons 18 and 20 are formed of a relatively ductile material, there is some residual elasticity and as a result there is an inherent twisting force induced as a result of the tendency of the tinsel strips attempting to unwrap themselves from tensile filament core 14.
  • the conduc- tive wires 12 are oriented within the array of cable 10, such that the orientation of the wraps of conductive tinsel of each conductive wire are arranged in alternating directions from one conductive wire to the next. This is shown in Fig. 4, and it provides the necessary canceling forces to eliminate the tendency of the cable to twist.
  • Fig. 4 also illustrates the extrusion process to produce four conductor cable 10 as shown in Fig. 1. The four conductor wires 12 are fed in parallel spaced relationship in the orientation of alternating directions of spiral wrapping of a conductive tinsel, through moltant block polyamide thermoplastic material 22 in extrusion die 24.

Landscapes

  • Non-Insulated Conductors (AREA)

Abstract

L'invention concerne un câble électrique à fils multiples (10) ayant une pluralité de fils métalliques conducteurs (12) comportant chacun un noyau élastique (14) de filaments multiples non liés en aramide (16). Lesdits fils conducteurs (12) ont en outre au moins une paire de rubans conducteurs (18, 20) enroulés en spirale dans la même direction autour du noyau élastique (14). En outre, chacun des fils conducteurs (12) est disposé avec une orientation telle que le ruban conducteur enroulé en spirale de chaque conducteur (12) est enroulé dans la direction opposée à celle du fil conducteur suivant.
PCT/US1992/007452 1992-09-03 1992-09-03 Cable electrique miniature WO1994006126A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU26561/92A AU2656192A (en) 1992-09-03 1992-09-03 Miniature electric cable
PCT/US1992/007452 WO1994006126A1 (fr) 1992-09-03 1992-09-03 Cable electrique miniature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1992/007452 WO1994006126A1 (fr) 1992-09-03 1992-09-03 Cable electrique miniature

Publications (1)

Publication Number Publication Date
WO1994006126A1 true WO1994006126A1 (fr) 1994-03-17

Family

ID=22231351

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1992/007452 WO1994006126A1 (fr) 1992-09-03 1992-09-03 Cable electrique miniature

Country Status (2)

Country Link
AU (1) AU2656192A (fr)
WO (1) WO1994006126A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7145082B2 (en) * 2001-11-16 2006-12-05 Nexons Flexible electrical line
CN105390182A (zh) * 2015-10-21 2016-03-09 东莞市领康线缆有限公司 医疗线导体铜箔丝

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438006A (en) * 1944-06-05 1948-03-16 Zenith Radio Corp Electric cord
US3037068A (en) * 1959-05-04 1962-05-29 Western Electric Co Retractile tinsel cordage
US4090763A (en) * 1976-04-22 1978-05-23 Bell Telephone Laboratories Incorporated Cordage for use in telecommunications
DE2851595A1 (de) * 1978-05-23 1979-11-29 Fujikura Ltd Flaches zuleitungskabel
US4313645A (en) * 1980-05-13 1982-02-02 Western Electric Company, Inc. Telephone cord having braided outer jacket
US4820012A (en) * 1986-11-14 1989-04-11 Kabushiki Kaisha Mec Laboratories Electric wire
US4835340A (en) * 1987-03-28 1989-05-30 Nicolay Gmbh Cable with moisture resistant tinsel conductors

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438006A (en) * 1944-06-05 1948-03-16 Zenith Radio Corp Electric cord
US3037068A (en) * 1959-05-04 1962-05-29 Western Electric Co Retractile tinsel cordage
US4090763A (en) * 1976-04-22 1978-05-23 Bell Telephone Laboratories Incorporated Cordage for use in telecommunications
DE2851595A1 (de) * 1978-05-23 1979-11-29 Fujikura Ltd Flaches zuleitungskabel
US4313645A (en) * 1980-05-13 1982-02-02 Western Electric Company, Inc. Telephone cord having braided outer jacket
US4820012A (en) * 1986-11-14 1989-04-11 Kabushiki Kaisha Mec Laboratories Electric wire
US4835340A (en) * 1987-03-28 1989-05-30 Nicolay Gmbh Cable with moisture resistant tinsel conductors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7145082B2 (en) * 2001-11-16 2006-12-05 Nexons Flexible electrical line
CN105390182A (zh) * 2015-10-21 2016-03-09 东莞市领康线缆有限公司 医疗线导体铜箔丝

Also Published As

Publication number Publication date
AU2656192A (en) 1994-03-29

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