WO1992010840A1 - Electrical cable - Google Patents
Electrical cable Download PDFInfo
- Publication number
- WO1992010840A1 WO1992010840A1 PCT/GB1991/002136 GB9102136W WO9210840A1 WO 1992010840 A1 WO1992010840 A1 WO 1992010840A1 GB 9102136 W GB9102136 W GB 9102136W WO 9210840 A1 WO9210840 A1 WO 9210840A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cable
- shield
- thread
- jacket
- electrical
- Prior art date
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
- H01B7/38—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
- an electrical cable which comprises one or more elongate electrical conductors, a layer of insulation surrounding the or each electrical conductor, and a metal electrical shield 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 invention may be employed with cables having a variety of screens although normally the screen will be in the form of a braid, and the invention is particularly suited to cables having braids formed from flat filaments.
- Such flat braids appear to be cut very easily by the thread and it is believed that this ease of cutting according to the present invention and the difficulty of stripping flat braided cables by the conventional method are, in fact, related:
- the braid filaments cannot easily slide over one another but tend to remain fixed when subjected to a force distorting the braid. In the conventional stripping method this prevents the braid being caused to bulge, and in the cable according to the invention this same tendency prevents any accommodation of the stress applied by the thread as it cuts through the filaments.
- 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.
- Figure 1 is a perspective view of a shielded twisted pair cable
- Figure 2 is a schematic side view of a cable at a number of stages during the stripping process of the invention.
- 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.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002097595A CA2097595C (en) | 1990-12-13 | 1991-12-03 | Electrical cable |
EP91920674A EP0561829B1 (en) | 1990-12-13 | 1991-12-03 | Electrical cable |
DE69113812T DE69113812T2 (en) | 1990-12-13 | 1991-12-03 | ELECTRIC CABLE. |
JP4500065A JPH06503200A (en) | 1990-12-13 | 1991-12-03 | electric cable |
BR919107161A BR9107161A (en) | 1990-12-13 | 1991-12-03 | ELETRIC CABLE |
NO19932144A NO310324B1 (en) | 1990-12-13 | 1993-06-11 | Electric cable |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9027110.7 | 1990-12-13 | ||
GB909027110A GB9027110D0 (en) | 1990-12-13 | 1990-12-13 | Electrical cable |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992010840A1 true WO1992010840A1 (en) | 1992-06-25 |
Family
ID=10686982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1991/002136 WO1992010840A1 (en) | 1990-12-13 | 1991-12-03 | Electrical cable |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0561829B1 (en) |
JP (1) | JPH06503200A (en) |
AT (1) | ATE129092T1 (en) |
AU (1) | AU8935291A (en) |
BR (1) | BR9107161A (en) |
CA (1) | CA2097595C (en) |
DE (1) | DE69113812T2 (en) |
FI (1) | FI932679A0 (en) |
GB (1) | GB9027110D0 (en) |
IE (1) | IE69361B1 (en) |
IL (1) | IL100351A (en) |
NO (1) | NO310324B1 (en) |
WO (1) | WO1992010840A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0872858A2 (en) * | 1997-04-17 | 1998-10-21 | Alcatel | Multiple parallel conductor for windings of electric devices and machines |
EP1008996A2 (en) * | 1998-12-09 | 2000-06-14 | Siemens Aktiengesellschaft | Cable with a core, an outer jacket and a rip cord |
EP2784788A1 (en) * | 2013-03-28 | 2014-10-01 | Alcatel-Lucent Shanghai Bell Co., Ltd. | Cable and method of manufacturing a cable |
CN112017824A (en) * | 2019-05-31 | 2020-12-01 | Aptiv技术有限公司 | Communication cable for autonomous vehicle |
CN112670016A (en) * | 2021-01-13 | 2021-04-16 | 陕西通达电缆制造有限公司 | Environment-friendly high-temperature-resistant shielding fireproof flexible cable |
RU204917U1 (en) * | 2021-02-02 | 2021-06-17 | Общество с ограниченной ответственностью Научно-Исследовательский Институт «Промышленные и Электрические Решения» | CABLE FOR CONTROL AND CONTROL CIRCUITS |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109935418A (en) * | 2017-12-15 | 2019-06-25 | 湖南华菱线缆股份有限公司 | A kind of aerospace ultralight data bus cable structure and preparation method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1404549A (en) * | 1964-05-20 | 1965-07-02 | Trefimetaux | Metallic braid, its manufacture and products equipped with this braid |
FR2519797A1 (en) * | 1982-01-14 | 1983-07-18 | Labinal | Novel configuration for screened cable - uses insulating core with edge groove carrying bare conductor which is exposed to physical contact with braided screen |
DE9003135U1 (en) * | 1990-03-17 | 1990-06-07 | Kabelmetal Electro Gmbh, 3000 Hannover, De | |
DE3917088A1 (en) * | 1989-02-03 | 1990-08-09 | Kabelmetal Electro Gmbh | Cable with electrical and/or optical fibre conductor - has projective sleeve with line of weakness formed to aid removal |
-
1990
- 1990-12-13 GB GB909027110A patent/GB9027110D0/en active Pending
-
1991
- 1991-12-03 DE DE69113812T patent/DE69113812T2/en not_active Expired - Fee Related
- 1991-12-03 WO PCT/GB1991/002136 patent/WO1992010840A1/en active IP Right Grant
- 1991-12-03 EP EP91920674A patent/EP0561829B1/en not_active Expired - Lifetime
- 1991-12-03 AT AT91920674T patent/ATE129092T1/en active
- 1991-12-03 BR BR919107161A patent/BR9107161A/en not_active IP Right Cessation
- 1991-12-03 JP JP4500065A patent/JPH06503200A/en not_active Withdrawn
- 1991-12-03 AU AU89352/91A patent/AU8935291A/en not_active Abandoned
- 1991-12-03 CA CA002097595A patent/CA2097595C/en not_active Expired - Fee Related
- 1991-12-12 IL IL10035191A patent/IL100351A/en not_active IP Right Cessation
-
1993
- 1993-06-02 IE IE435691A patent/IE69361B1/en not_active IP Right Cessation
- 1993-06-11 NO NO19932144A patent/NO310324B1/en not_active IP Right Cessation
- 1993-06-11 FI FI932679A patent/FI932679A0/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1404549A (en) * | 1964-05-20 | 1965-07-02 | Trefimetaux | Metallic braid, its manufacture and products equipped with this braid |
FR2519797A1 (en) * | 1982-01-14 | 1983-07-18 | Labinal | Novel configuration for screened cable - uses insulating core with edge groove carrying bare conductor which is exposed to physical contact with braided screen |
DE3917088A1 (en) * | 1989-02-03 | 1990-08-09 | Kabelmetal Electro Gmbh | Cable with electrical and/or optical fibre conductor - has projective sleeve with line of weakness formed to aid removal |
DE9003135U1 (en) * | 1990-03-17 | 1990-06-07 | Kabelmetal Electro Gmbh, 3000 Hannover, De |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0872858A2 (en) * | 1997-04-17 | 1998-10-21 | Alcatel | Multiple parallel conductor for windings of electric devices and machines |
EP0872858A3 (en) * | 1997-04-17 | 1999-02-24 | Alcatel | Multiple parallel conductor for windings of electric devices and machines |
US5962945A (en) * | 1997-04-17 | 1999-10-05 | Alcatel | Multiple parallel conductor |
EP1008996A2 (en) * | 1998-12-09 | 2000-06-14 | Siemens Aktiengesellschaft | Cable with a core, an outer jacket and a rip cord |
EP1008996A3 (en) * | 1998-12-09 | 2000-12-06 | Siemens Aktiengesellschaft | Cable with a core, an outer jacket and a rip cord |
US6314855B1 (en) | 1998-12-09 | 2001-11-13 | Siemens Aktiengesellschaft | Cable with a cable core, a cable jacket and a tear thread |
EP2784788A1 (en) * | 2013-03-28 | 2014-10-01 | Alcatel-Lucent Shanghai Bell Co., Ltd. | Cable and method of manufacturing a cable |
CN112017824A (en) * | 2019-05-31 | 2020-12-01 | Aptiv技术有限公司 | Communication cable for autonomous vehicle |
CN112017824B (en) * | 2019-05-31 | 2023-06-27 | Aptiv技术有限公司 | Communication cable for autonomous vehicle |
CN112670016A (en) * | 2021-01-13 | 2021-04-16 | 陕西通达电缆制造有限公司 | Environment-friendly high-temperature-resistant shielding fireproof flexible cable |
RU204917U1 (en) * | 2021-02-02 | 2021-06-17 | Общество с ограниченной ответственностью Научно-Исследовательский Институт «Промышленные и Электрические Решения» | CABLE FOR CONTROL AND CONTROL CIRCUITS |
Also Published As
Publication number | Publication date |
---|---|
FI932679A (en) | 1993-06-11 |
NO310324B1 (en) | 2001-06-18 |
NO932144D0 (en) | 1993-06-11 |
DE69113812D1 (en) | 1995-11-16 |
IL100351A (en) | 1996-03-31 |
IL100351A0 (en) | 1992-09-06 |
CA2097595A1 (en) | 1992-06-14 |
FI932679A0 (en) | 1993-06-11 |
AU8935291A (en) | 1992-07-08 |
IE914356A1 (en) | 1992-06-17 |
EP0561829A1 (en) | 1993-09-29 |
CA2097595C (en) | 2001-10-23 |
JPH06503200A (en) | 1994-04-07 |
BR9107161A (en) | 1993-11-03 |
GB9027110D0 (en) | 1991-02-06 |
ATE129092T1 (en) | 1995-10-15 |
IE69361B1 (en) | 1996-09-04 |
NO932144L (en) | 1993-06-11 |
EP0561829B1 (en) | 1995-10-11 |
DE69113812T2 (en) | 1996-06-20 |
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