EP0561829B1 - Cable electrique - Google Patents

Cable electrique Download PDF

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Publication number
EP0561829B1
EP0561829B1 EP91920674A EP91920674A EP0561829B1 EP 0561829 B1 EP0561829 B1 EP 0561829B1 EP 91920674 A EP91920674 A EP 91920674A EP 91920674 A EP91920674 A EP 91920674A EP 0561829 B1 EP0561829 B1 EP 0561829B1
Authority
EP
European Patent Office
Prior art keywords
cable
shield
thread
jacket
electrical
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
EP91920674A
Other languages
German (de)
English (en)
Other versions
EP0561829A1 (fr
Inventor
Stanley Michael Norden
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.)
Raychem Ltd
Original Assignee
Raychem Ltd
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 Raychem Ltd filed Critical Raychem Ltd
Publication of EP0561829A1 publication Critical patent/EP0561829A1/fr
Application granted granted Critical
Publication of EP0561829B1 publication Critical patent/EP0561829B1/fr
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
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/38—Insulated conductors or cables characterised by their form with arrangements for facilitating removal of insulation
    • H01B7/385—Insulated conductors or cables characterised by their form with arrangements for facilitating removal of insulation comprising a rip cord or wire

Definitions

  • This invention relates to electrical cables, in particular to cables that are provided with a screen, for example to prevent or reduce electromagnetic interference.
  • Commonly employed screened cables include coaxial cables in which a single elongate electrical conductor is surrounded by a dielectric and a conductive screen.
  • Other screened cables employ one or more insulated conductors, eg. in twisted pair configuration, the conductor or conductors being enclosed in a single common screen.
  • the conventional method of terminating a cable with a braided screen comprises
  • DE-A-3917088 describes a cable having a metal casing with a longitudinal line of weakness and a stripping thread located under the line of weakness for forming a longitudinal slit in the casing.
  • DE-U-9003135 one may dispense with the line of weakness or breaking points by employing a stripping thread formed from twisted strands of aramide or other tensile material which is impregnated with an anti adhesion agent.
  • an electrical cable which comprises one or more elongate electrical conductors, a layer of insulation surrounding the or each electrical conductor, and a braided metal electrical shield formed from flat filaments surrounding the conductor or conductors and the insulation, the cable including a pull-thread that extends along the length of the cable under the shield so that the shield can be cut longitudinally by pulling the thread.
  • Preferred jacket materials include polymers such as Polyolefins, eg. ethylene homopolymers and copolymers with alpha olefins, halogenated polymers, eg.
  • tetrafluorethylene vinylidene fluoride, hexafluoropropylene and vinyl chloride homo or copolymers, especially ethylene/tetrafluoroethylene copolymer, polamides, polyesters, polyimides, polyether ketones, eg. polyarylether ketones, aromatic polyether imides and sulphones, silicones, alkene/vinyl acetate copolymers and the like.
  • the polymers may be used alone or as blends with one another and may contain fillers, eg. silica and metal oxides, eg. treated and untreated metal oxide flame retardants such as hydrated alumina and titania.
  • While the present invention is applicable to cables having only a single central conductor surrounded by a dielectric such as coaxial cables and single screened wires, it will more usually be applied to screened muliticonductor cables, eg. a screened twisted pair cables. It has hitherto been relatively difficult to cut back the screen of such cables in the case of flat filament braids, not only because it is difficult or impossible to cause the shield to bulge by pushing it toward the remainder of the shield but also because of the undulating surface of the cable caused by the helical geometry of the insulated conductors or wires.
  • the pull thread In the case of multiconductor cables it is possible for the pull thread to be layed up in the cable in the manner of an additional wire so that when it is pulled it will cut through the shield and jacket in a helical path. This may not be particularly easy or convenient for an operator to perform manually, and so it is preferred for the pull thread to extend substantially axially along the cable in order that it may be pulled along the cable at a substantially uniform orientation.
  • the pull thread is preferably electrically insulating and more preferably formed from a polymer.
  • the most preferred material is based on an aromatic polyamide for example as sold by Akzo under the trademark "Kevlar". It will normally be in the form of a relatively large number of monofilaments.
  • the cable may be provided with more than one stripping thread.
  • the cable may be provided with one thread under the shield and a second thread under the jacket but over the shield so that part of the shield can be exposed by stripping the jacket only.
  • a screened twisted pair cable comprises a twisted pair of wires 1 and 2 each comprising a stranded tinned copper conductor 3 and a single wall or dual wall insulation 4, formed for example from polyethylene and/or polyvinylidine fluoride.
  • a shield 5 is provided in the form of a braid of flattened tinned copper filaments followed by an extruded outer jacket 6 formed form an ethylene tetrafluoroethylene copolymer.
  • a pull thread 7 formed from a number of monofilaments of an aromatic polyamide (sold under the trademark "Kevlar”) extends axially along the length of the cable underneath the cable jacket 6 and the shield 5.
  • the pull thread 7 is simply pulled perpendicularly to the cable causing it to cut through both the shield 5 and the jacket 6 until the shield and jacket have been severed to the appropriate length.
  • the shield may then be terminated in any appropriate manner.
  • Figure 2 shows a number of side views of a screened twisted pair cable at various stages during the termination process.
  • the cable comprises a pair of insulated conductors 1 and 2 enclosed by a braided shield 5 and a jacket 6.
  • the cable has two pull-threads, one thread 7 located under the shield 5 and the second thread 8 located under the jacket 6 but over the shield.
  • the threads 7 and 8 will normally have different colours or patterns in order to distinguish them.
  • Thread 7 is then pulled in order to slit the jacket 6 and shield 5 to the point at which the shield 5 can be tidied up with a pair of snips to form the cable as shown in Figure 2b.
  • the thread 8 is pulled back in order to slit the jacket 6 by the amount it is desired to expose the shield 5.
  • the end of the jacket 6 can be torn off circumferentially and tidied by means of snips to form the cable as shown in Figure 2c.
  • the excess lengths of pull-thread can be cut off at any convenient point.

Landscapes

  • Insulated Conductors (AREA)
  • Organic Insulating Materials (AREA)
  • Communication Cables (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Inorganic Insulating Materials (AREA)
  • Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Endoscopes (AREA)

Claims (7)

  1. Câble électrique qui comporte un ou plusieurs conducteurs électriques allongés (3), une couche d'isolant (4) entourant le ou chaque conducteur électrique, et un blindage électrique métallique tressé (5) formé de filaments plats entourant le conducteur ou les conducteurs isolés, le câble comprenant un fil (7) à tirer qui s'étend sur la longueur du câble au-dessous du blindage (5) afin que l'on puisse couper longitudinalement le blindage en tirant le fil.
  2. Câble selon la revendication 1, qui comprend une gaine (6) de câble placée au-dessus du blindage électrique (5).
  3. Câble selon la revendication 1 ou 2, qui comprend plusieurs conducteurs allongés et isolés (3).
  4. Câble selon l'une quelconque des revendications 1 à 3, dans lequel le fil (7) à tirer s'étend sensiblement axialement le long du câble.
  5. Câble selon l'une quelconque des revendications 1 à 4, dans lequel le fil (7) à tirer est électriquement isolant.
  6. Câble selon l'une quelconque des revendications 1 à 5, dans lequel le fil (7) à tirer est formé d'un polymère.
  7. Câble selon la revendication 5, dans lequel le fil (7) à tirer est formé d'un polyamide aromatique.
EP91920674A 1990-12-13 1991-12-03 Cable electrique Expired - Lifetime EP0561829B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB909027110A GB9027110D0 (en) 1990-12-13 1990-12-13 Electrical cable
GB9027110 1990-12-13
PCT/GB1991/002136 WO1992010840A1 (fr) 1990-12-13 1991-12-03 Cable electrique

Publications (2)

Publication Number Publication Date
EP0561829A1 EP0561829A1 (fr) 1993-09-29
EP0561829B1 true EP0561829B1 (fr) 1995-10-11

Family

ID=10686982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91920674A Expired - Lifetime EP0561829B1 (fr) 1990-12-13 1991-12-03 Cable electrique

Country Status (13)

Country Link
EP (1) EP0561829B1 (fr)
JP (1) JPH06503200A (fr)
AT (1) ATE129092T1 (fr)
AU (1) AU8935291A (fr)
BR (1) BR9107161A (fr)
CA (1) CA2097595C (fr)
DE (1) DE69113812T2 (fr)
FI (1) FI932679A0 (fr)
GB (1) GB9027110D0 (fr)
IE (1) IE69361B1 (fr)
IL (1) IL100351A (fr)
NO (1) NO310324B1 (fr)
WO (1) WO1992010840A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0872858A3 (fr) * 1997-04-17 1999-02-24 Alcatel Conducteur parallèle multiple pour enroulements de machines et appareils électriques
DE19856814A1 (de) 1998-12-09 2000-06-15 Siemens Ag Kabel mit einer Kabelseele, einem Kabelmantel und einem Reißfaden
EP2784788A1 (fr) * 2013-03-28 2014-10-01 Alcatel-Lucent Shanghai Bell Co., Ltd. Câble et procédé pour fabriquer un câble
CN109935418A (zh) * 2017-12-15 2019-06-25 湖南华菱线缆股份有限公司 一种航空航天用超轻数据总线电缆结构及制备方法
EP3745425B1 (fr) * 2019-05-31 2022-12-21 Aptiv Technologies Limited Câbles de communication pour véhicules autonomes
CN112670016B (zh) * 2021-01-13 2022-04-05 陕西通达电缆制造有限公司 一种环保耐高温屏蔽防火柔软电缆
RU204917U1 (ru) * 2021-02-02 2021-06-17 Общество с ограниченной ответственностью Научно-Исследовательский Институт «Промышленные и Электрические Решения» Кабель для цепей управления и контроля

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1404549A (fr) * 1964-05-20 1965-07-02 Trefimetaux Trese métallique, sa fabrication et produits équipés de cette tresse
FR2519797A1 (fr) * 1982-01-14 1983-07-18 Labinal Nouveau fil electrique blinde
DE3917088A1 (de) * 1989-02-03 1990-08-09 Kabelmetal Electro Gmbh Kabel mit elektrischen und/oder optischen uebertragungselementen
DE9003135U1 (fr) * 1990-03-17 1990-06-07 Kabelmetal Electro Gmbh, 3000 Hannover, De

Also Published As

Publication number Publication date
CA2097595A1 (fr) 1992-06-14
WO1992010840A1 (fr) 1992-06-25
IL100351A (en) 1996-03-31
DE69113812T2 (de) 1996-06-20
NO932144L (no) 1993-06-11
IE914356A1 (en) 1992-06-17
BR9107161A (pt) 1993-11-03
IE69361B1 (en) 1996-09-04
AU8935291A (en) 1992-07-08
NO310324B1 (no) 2001-06-18
IL100351A0 (en) 1992-09-06
NO932144D0 (no) 1993-06-11
CA2097595C (fr) 2001-10-23
JPH06503200A (ja) 1994-04-07
FI932679A (fi) 1993-06-11
ATE129092T1 (de) 1995-10-15
FI932679A0 (fi) 1993-06-11
GB9027110D0 (en) 1991-02-06
DE69113812D1 (de) 1995-11-16
EP0561829A1 (fr) 1993-09-29

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