GB2481028A - A power cord comprising tinsel wires - Google Patents
A power cord comprising tinsel wires Download PDFInfo
- Publication number
- GB2481028A GB2481028A GB1009597.4A GB201009597A GB2481028A GB 2481028 A GB2481028 A GB 2481028A GB 201009597 A GB201009597 A GB 201009597A GB 2481028 A GB2481028 A GB 2481028A
- Authority
- GB
- United Kingdom
- Prior art keywords
- power cord
- wires
- tinsel
- textile material
- electrically conducting
- 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.)
- Withdrawn
Links
- 239000004020 conductor Substances 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 42
- 239000004753 textile Substances 0.000 claims abstract description 28
- 229920003235 aromatic polyamide Polymers 0.000 claims abstract description 18
- 229920000728 polyester Polymers 0.000 claims abstract description 15
- 239000004677 Nylon Substances 0.000 claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 13
- 229920001778 nylon Polymers 0.000 claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- 239000010949 copper Substances 0.000 claims abstract description 12
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 11
- 239000004760 aramid Substances 0.000 claims abstract description 8
- 229910001316 Ag alloy Inorganic materials 0.000 claims abstract description 4
- 229920000742 Cotton Polymers 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 229920000271 Kevlar® Polymers 0.000 abstract 1
- 229920000784 Nomex Polymers 0.000 abstract 1
- 239000004761 kevlar Substances 0.000 abstract 1
- 239000004763 nomex Substances 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 description 2
- 239000004697 Polyetherimide Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920001955 polyphenylene ether Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/006—Constructional features relating to the conductors
Landscapes
- Ropes Or Cables (AREA)
- Insulated Conductors (AREA)
Abstract
The power cord 10 includes a plurality of electrical conductors 12, with each conductor comprising a core 20 surrounded by an electrically insulating sleeve 22, and a filler material 18. To improve the fatigue endurance of the cord, the core includes a plurality of electrically conducting wires 28 and a plurality of tinsel wires 26. Each tinsel wire may comprise at least one electrically conducting ribbon, preferably copper, a copper alloy or a silver alloy, braided with a strand or thread of textile material, preferably polymeric such as nylon, polyester or aramid (Kevlar, Nomex). Different tinsel wires may be mixed to vary the properties of the power cord. A central member 24 may also be formed from a textile material, preferably polymeric such as nylon, polyester or aramid (KevlarRTM, NomexRTM).
Description
A POWER CORD
FIELD OF THE INVENTION
The present invention relates to a power cord for providing an electrical coupling between a power source and an article, such as a domestic appliance.
BACKGROUND OF THE INVENTION
A power cord generally comprises a pair of electrical conductors housed within an electrically insulating jacket. Each conductor comprises a plurality of conducting wires, generally formed from copper, which are twisted together and surrounded by an electrically insulating sleeve. Failure of the power cord generally occurs at the part of the power cord which is subject to frequent sharp bending or oscillation. As one of the wires breaks, the cord becomes progressively weaker at the point of failure of that wire as other wires start to break. Abrupt failure can also occur if the cord is compressed, for example between a floor surface and the wheels of a vacuum cleaner, a door or an item of furniture.
SUMMARY OF THE INVENTION
The present invention provides a power cord comprising a plurality of electrical conductors, each conductor comprising a core surrounded by an electrically insulating sleeve, the core comprising a plurality of electrically conducting wires and a plurality of tinsel wires.
By replacing some of the electrically conducting wires with tinsel wires, each preferably comprising at least one electrically conducting ribbon braided with a strand or thread of textile material, which may have a much greater flexibility than the electrically conducting wires, the resistance to failure of the power cord due to oscillation, frequent bending or compression can be improved.
The electrically conducting wires are preferably formed from one of copper, a copper alloy, silver, a silver alloy, nickel and a nickel alloy.
The electrically conducting ribbon is preferably formed from one of copper, a copper alloy and a silver alloy. The strand or thread of textile material is preferably formed from polymeric material, for example one of nylon, polyester and aramid fibre.
Each of the tinsel wires may have the same composition. For example, all of the tinsel wires may comprise a ribbon formed from copper or a copper alloys wrapped around a thread of aramid fibres, and so the present invention may also provide a power cord comprising a plurality of electrical conductors, each conductor comprising a core surrounded by an electrically insulating sleeve, the core comprising a plurality of wires formed from copper or a copper alloy, and a plurality of tinsel wires each comprising a copper or copper alloy ribbon wrapped around a thread of aramid fibres.
Alternatively, the plurality of tinsel wires may comprise different types of tinsel wire.
For example, the plurality of tinsel wires may comprise at least one first tinsel wire comprising a first textile material, and at least one second tinsel wire comprising a second textile material different from the first textile material. This can enable tinsel wires having different physical properties to be incorporated into the conductors, for example to optimize the strength or the elasticity of the conductors. Therefore, the present invention further provides a power cord comprising a plurality of electrical conductors, each conductor comprising a core surrounded by an electrically insulating sleeve, the core comprising a plurality of electrically conducting wires and a plurality of tinsel wires comprising at least one first tinsel wire comprising a first textile material, and at least one second tinsel wire comprising a second textile material different from the first textile material. Each textile material is preferably formed from polymeric material, and may be selected from a group comprising nylon, polyester and aramid fibre. For example, the first textile material may be nylon and the second textile material may be aramid fibre. Alternatively, the first textile material may be polyester and the second textile material may be aramid fibre. Each first tinsel wire may be wrapped around a respective second tinsel wire. Alternatively, the first and second tinsel wires may be dispersed, preferably relatively evenly, amongst the electrically conducting wires.
Each tinsel wire may be twisted or braided with a respective electrically conducting wire. The resulting plurality of composite wires may then be dispersed, preferably relatively evenly, amongst the plurality of conducting wires, with the resulting combination of composite wires and conducting wires twisted or braided to form the core of the electrical conductor.
The core may comprise a central member around which the wires are disposed or wrapped. The material from which the central member is formed can be selected to optimise the tensile strength or the strain to fracture of the conductors. The central member is preferably formed from electrically insulating material, and is preferably in the form of a strand or thread formed from textile material. For example, the central member may be formed from polymeric material such as polyester or aramid fibres depending on the required mechanical behavior of the power cord.
The cord preferably comprises a jacket surrounding the conductors, and filler material located between the conductors and the jacket. The filler material is preferably formed from textile material, and may be formed from at least one of cotton, nylon, polyester and aramid fibres depending on the required mechanical behaviour of the power cord.
BRIEF DESCRIPTION OF THE DRAWINGS
Preferred features of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a schematic sectional view through a power cable; Figure 2 is a schematic sectional view through a first embodiment of a conductor of the power cable of Figure 1; Figure 3 is a schematic sectional view through a second embodiment of a conductor of the power cable of Figure 1; Figure 4 is a schematic sectional view through a third embodiment of a conductor of the power cable of Figure 1; Figure 5 is a schematic sectional view through a fourth embodiment of a conductor of the power cable of Figure 1; and Figure 6 is a schematic sectional view through a fifth embodiment of a conductor of the power cable of Figure 1.
DETAILED DESCRIPTION OF THE INVENTION
With reference first to Figure 1, a power cord 10 for providing an electrical coupling between a power source and an article, such as a domestic appliance, comprises a pair of electrical conductors 12 surrounded by an electrically insulating jacket 14. The jacket 14 is preferably formed from PVC (polyvinylchloride), but alternative materials include modified-polyphenylene ether (MPPE) resin, such as NorylTM resin, siloxane-polyetherimide copolymer, and thermoplastic polyester elastomer (TPE-E) materials. A filler 16 formed from strands or threads of textile material is located between the conductors 12 and the jacket 14. Depending on the desired mechanical properties of the power cord 10, the filler 16 may be formed from one or more of cotton, nylon, polyester and aramid fibres, for example KevlarTM or NomexTM fibres. A cotton paper sleeve 18 may be provided on the internal periphery of the jacket 14. The power cord 10 has a diameter in the range from 5 to 10 mm, and each conductor 12 preferably has a diameter in the range from 2 to 4 mm.
Figure 2 illustrates a first embodiment of an electrical conductor 12 for use in the power cord 10. The electrical conductor 12 comprises a core 20 surrounded by a protective electrically insulating sleeve 22. The sleeve 22 is preferably formed from PVC. The core 20 comprises a central member 24 in the form of a strand or thread formed from a bundle of aramid fibres, a plurality of tinsel wires 26 and a plurality of electrically conducting wires 28. The central member 24 is preferably formed from a strand of 200 Denier KevlarTM. Each tinsel wire 26 comprises a ribbon formed from copper or a copper alloy which is braided with a nylon strand. The electrically conducting wires 28 are preferably formed from copper or a copper alloy. Optionally, each tinsel wire 26 may be twisted or braided with a respective electrically conducting wire to form a composite wire. In this example the conductor 12 comprises three tinsel wires 26 but the conductor 12 may comprise any desired number of tinsel wires 26. The conductor 12 comprises around forty to sixty electrically conducting wires 28. The tinsel wires 26 and the electrically conducting wires 28 may be twisted or braided about the central member 24. The tinsel wires 26 preferably have a diameter of around 0.10 to around 0.15 mm, whereas the electrically conducting wires 28 preferably have a diameter of around 0.15 to around 0.20 mm.
Figures 3 to 6 each illustrate schematically a respective alternative conductor for use in the power cord 10.
The conductor 30 illustrated in Figure 3 replaces the central member 24 of the conductor 12 with a plurality of additional tinsel wires 32. These additional tinsel wires 32 each comprise a ribbon formed from copper or a copper alloy which is braided with a strand of aramid fibres. Each additional tinsel wire 32 is wrapped around a respective one of the tinsel wires 26. Alternatively, to facilitate manufacture each additional tinsel wire 32 may arranged amongst the electrically conducting wires 28, preferably so that the tinsel wires 26, 32 are relatively evenly dispersed amongst the electrically conducting wires 28. The resulting combination of tinsel wires 26, 32 and electrically conducting wires 28 is then twisted or braided, and surrounded by sleeve 22.
The conductor 40 illustrated in Figure 4 replaces the central member 24 of the conductor 12 with a central member 42 formed from polyester to increase the strain to fracture of the conductor 40 in comparison to the conductor 12.
The conductor 50 illustrated in Figure 5 replaces the additional tinsel wires 32 of the conductor 30 with additional tinsel wires 52. These additional tinsel wires 52 each comprise a ribbon formed from copper or a copper alloy which is braided with a strand of polyester. As with the additional tinsel wires 32, each additional tinsel wire 52 may be wrapped around a respective one of the tinsel wires 26, or arranged amongst the electrically conducting wires 28.
Finally, the conductor 60 illustrated in Figure 6 omits the tinsel wires 26 of the conductor 30 of Figure 3.
The composition of the filler 16 may be varied depending on the composition of the electrical conductor. For example, a power cord comprising a pair of the electrical conductors 12 illustrated in Figure 2 may include filler formed from nylon, such as 2000 Denier nylon. A power cord comprising a pair of the electrical conductors 30 may include filler formed from polyester, whereas a power cord comprising a pair of the electrical conductors 40 may include cotton filler. A power cord comprising a pair of the electrical conductors 50 may include filler formed from aramid fibres.
Claims (18)
- CLAIMS1. A power cord comprising a plurality of electrical conductors, each conductor comprising a core surrounded by an electrically insulating sleeve, the core comprising a plurality of electrically conducting wires and a plurality of tinsel wires.
- 2. A power cord as claimed in claim 1, wherein each tinsel wire comprises at least one electrically conducting ribbon braided with a strand or thread of textile material.
- 3. A power cord as claimed in claim 2, wherein the strand or thread of textile material is formed from polymeric material.
- 4. A power cord as claimed in claim 2 or claim 3, wherein the strand or thread of textile material is formed from one of nylon, polyester and aramid fibre.
- 5. A power cord as claimed in claim 1, wherein the plurality of tinsel wires comprises different types of tinsel wire.
- 6. A power cord as claimed in claim 1 or claim 5, wherein the plurality of tinsel wires comprises at least one first tinsel wire comprising a first textile material, and at least one second tinsel wire comprising a second textile material different from the first textile material.
- 7. A power cord as claimed in claim 6, wherein each textile material is formed from polymeric material.
- 8. A power cord as claimed in claim 6 or claim 7, wherein the textile materials are selected from a group comprising nylon, polyester and aramid fibre.
- 9. A power cord as claimed in any of the preceding claims, wherein each tinsel wire is twisted or braided with a respective electrically conducting wire.
- 10. A power cord as claimed in any of the preceding claims, wherein the electrically conducting wires are formed from one of copper, a copper alloy, silver, a silver alloy, nickel and a nickel alloy.
- 11. A power cord as claimed in any of the preceding claims, wherein the core comprises a central member around which the wires are disposed.
- 12. A power cord as claimed in claim 11, wherein the wires are wrapped around the central member.
- 13. A power cord as claimed in claim 11 or claim 12, wherein the central member comprises a strand or thread formed from textile material.
- 14. A power cord as claimed in any of claims 11 to 13, wherein the central member is formed from one of polyester and aramid fibres.
- 15. A power cord as claimed in any of the preceding claims, comprising a jacket surrounding the conductors, and filler material located between the conductors and the jacket.
- 16. A power cord as claimed in claim 15, wherein the filler material is formed from textile material.
- 17. A power cord as claimed in claim 15 or claim 16, wherein the filler material is formed from one of cotton, nylon, polyester and aramid fibres.
- 18. A power cord substantially as herein described with reference to the accompanying drawings.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1009597.4A GB2481028A (en) | 2010-06-09 | 2010-06-09 | A power cord comprising tinsel wires |
| PCT/GB2011/050986 WO2011154716A1 (en) | 2010-06-09 | 2011-05-25 | Power cord comprising multiple set of tinsel wires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1009597.4A GB2481028A (en) | 2010-06-09 | 2010-06-09 | A power cord comprising tinsel wires |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201009597D0 GB201009597D0 (en) | 2010-07-21 |
| GB2481028A true GB2481028A (en) | 2011-12-14 |
Family
ID=42471342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1009597.4A Withdrawn GB2481028A (en) | 2010-06-09 | 2010-06-09 | A power cord comprising tinsel wires |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2481028A (en) |
| WO (1) | WO2011154716A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105359224A (en) * | 2013-07-19 | 2016-02-24 | 陶氏环球技术有限责任公司 | Cable with polymer composite core |
| CN105489285A (en) * | 2016-01-14 | 2016-04-13 | 深圳市红旗电工科技有限公司 | High-flexibility double-sheath towline cable and manufacturing method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017147628A1 (en) * | 2016-02-25 | 2017-08-31 | Detnet South Africa (Pty) Ltd | Detonator cable |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3067569A (en) * | 1957-02-28 | 1962-12-11 | Dow Chemical Co | Electrical conductors and methods of manufacture thereof |
| US20050011667A1 (en) * | 2003-07-16 | 2005-01-20 | Chang-Chi Lee | Structure of audio signal cable |
| EP1566817A1 (en) * | 2004-02-18 | 2005-08-24 | Rich Electric Wire & Cable Co., Ltd. | Improved structure of audio signal cable |
| US20080053682A1 (en) * | 2003-07-16 | 2008-03-06 | Jay Victor | Cable Structure |
| EP2109118A2 (en) * | 2008-04-08 | 2009-10-14 | Goto Electronic Co., Ltd. | Tinsel wire |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3037068A (en) * | 1959-05-04 | 1962-05-29 | Western Electric Co | Retractile tinsel cordage |
| DE4136227A1 (en) * | 1991-11-04 | 1993-05-06 | Kabelwerke Reinshagen Gmbh, 5600 Wuppertal, De | Electrical cable for high tensile loading - has metal conductor wires wrapped or braided around central core of highly oriented polyethylene@ fibres |
-
2010
- 2010-06-09 GB GB1009597.4A patent/GB2481028A/en not_active Withdrawn
-
2011
- 2011-05-25 WO PCT/GB2011/050986 patent/WO2011154716A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3067569A (en) * | 1957-02-28 | 1962-12-11 | Dow Chemical Co | Electrical conductors and methods of manufacture thereof |
| US20050011667A1 (en) * | 2003-07-16 | 2005-01-20 | Chang-Chi Lee | Structure of audio signal cable |
| US20060289196A1 (en) * | 2003-07-16 | 2006-12-28 | Chang-Chi Lee | Audio cable structure |
| US20080053682A1 (en) * | 2003-07-16 | 2008-03-06 | Jay Victor | Cable Structure |
| EP1566817A1 (en) * | 2004-02-18 | 2005-08-24 | Rich Electric Wire & Cable Co., Ltd. | Improved structure of audio signal cable |
| EP2109118A2 (en) * | 2008-04-08 | 2009-10-14 | Goto Electronic Co., Ltd. | Tinsel wire |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105359224A (en) * | 2013-07-19 | 2016-02-24 | 陶氏环球技术有限责任公司 | Cable with polymer composite core |
| CN105359224B (en) * | 2013-07-19 | 2018-06-29 | 陶氏环球技术有限责任公司 | Cable with polymer composite core |
| CN105489285A (en) * | 2016-01-14 | 2016-04-13 | 深圳市红旗电工科技有限公司 | High-flexibility double-sheath towline cable and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011154716A1 (en) | 2011-12-15 |
| GB201009597D0 (en) | 2010-07-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |