GB2230106A - Composite electric and optical aerial cable - Google Patents
Composite electric and optical aerial cable Download PDFInfo
- Publication number
- GB2230106A GB2230106A GB9005501A GB9005501A GB2230106A GB 2230106 A GB2230106 A GB 2230106A GB 9005501 A GB9005501 A GB 9005501A GB 9005501 A GB9005501 A GB 9005501A GB 2230106 A GB2230106 A GB 2230106A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lobe
- optical cable
- composite electric
- elongate
- electric
- 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- Withdrawn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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/22—Cables including at least one electrical conductor together with optical fibres
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4416—Heterogeneous cables
- G02B6/4422—Heterogeneous cables of the overhead type
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Communication Cables (AREA)
Abstract
A composite electric and optical aerial cable especially suitable for use as a drop cable for extending between an aerial electric and optical cable installation and a building is of a figure-of-eight transverse cross-section and has, in one lobe 2 of the cable, at least one flexible reinforcing element 5 and insulated electric conductors 8 and, in the other lobe 3 of the cable, an optical fibre element 15. Insulated reinforcing metal elements 12 may extend helically around the central reinforcing element 5. The optical fibre element 15 may consist of a plastics tube 16 which is separately formed with respect to the lobe 3 and in which optical fibres 17 are loosely housed or it may comprise at least one tightly buffered optical fibre embedded in the lobe. <IMAGE>
Description
COMPOSITE AERIAL CABLE
This invention relates to a composite electric and optical cable suitable for use as an aerial cable.
According to the invention, an improved composite electric and optical cable comprises a flexible elongate body of extruded electrically insulating material having a transverse cross-section approximating to a figure-of-eight, wherein in one lobe of the 8-shaped elongate body there are embedded at least one flexible elongate reinforcing member of high tensile strength and a plurality of electrically insulated elongate electric conductors and wherein in the other lobe of the 8-shaped elongate body there is disposed an optical fibre element comprising at least one optical fibre.
The or each flexible elongate reinforcing element of high tensile strength may be of metal or non-metal.
Where the or a flexible elongate reinforcing element is of metal, e.g. steel, preferably it is surrounded by a layer of plastics insulating material; it may be a single wire or it may be a plurality of wires stranded together. Where the or a flexible elongate reinforcing element is of non-metal, preferably it is made of aromatic polyamide or of a plastics material having non-metallic reinforcing filaments embedded therein.
In one preferred embodiment, a central flexible elongate reinforcing element of high tensile strength embedded in said one lobe of the 8-shaped body has a plurality of electrically insulated elongate electric conductors of a metal or metal alloy of high electrical conductivity and a plurality of electrically insulated elongate reinforcing elements of metal or metal alloy extending helically around the central reinforcing element with their longitudinal axes lying on an imaginary cylinder of substantially circular cross-section concentric with the central longitudinal axis of the central reinforcing element.
In some circumstances, the plurality of electrically insulated elongate electric conductors may include one or more than one pair of insulated conductors twisted together and/or one or more than one quad of insulated conductors twisted together.
In all cases, preferably, each electric conductor is a single wire of copper or copper alloy.
The optical fibre element disposed in the other lobe of the 8-shaped elongate body may be one or more than one tightly buffered optical fibre embedded in said other lobe but, preferably, there is in said other lobe at least one longitudinally extending bore in which is loosely housed at least one optical fibre and, in this case, preferably the or each optical fibre has a length substantially greater than that of the bore in which it is loosely housed.
Where the other lobe of the 8-shaped elongate body has a single bore extending throughout its length in which at least one optical fibre is loosely housed, preferably the bore extends centrally with respect to the lobe and, in a preferred embodiment, is the bore of a tube of rubber or plastics material which is separately formed with respect to, and which is embedded in said lobe of, the 8-shaped elongate body, the tube with the optical fibre or fibres loosely housed in its bore constituting an optical fibre element.
In an alternative embodiment, a plurality of tubes of rubber or plastics material, separately formed with respect to said lobe, are embedded in the lobe, each of which tubes has at least one opLical fibre loosely housed therein. Preferably, a plurality of such tubes are helically laid around a central elongate member which is embedded in said lobe and which itself may be a tube in which at least one optical fibre is loosely housed or may be an elongate reinforcing member of high tensile strength.
Preferably, the or each bore in which one or more than one optical fibre is loosely housed may be substantially filled throughout its length with a water-impermeable medium of a grease-like nature.
The flexible extruded elongate body is preferably made of a plastics material, e.g. polyethylene.
The invention is further illustrated by a description, by way of example, of two preferred composite electric and optical cables with reference to the accompanying drawings, in which:
Figure 1 is a transverse cross-sectional view of the first preferred composite electric and optical cable, and
Figure 2 is a similar view of the second preferred composite electric and optical cable.
Referring to Figure 1, the first preferred composite electric and optical cable comprises a flexible elongate body 1 of extruded polyethylene having a transverse cross-section approximating to a figure-of-eight and consisting of a major lobe 2 of approximately circular transverse cross-section and a minor lobe 3 of approximately circular transverse cross-section joined together throughout their lengths by a web 4 integral with the lobes.
In the major lobe 2 there are embedded a central flexible elongate reinforcing member 5 of high tensile strength consisting of a steel wire 6 electrically insulated with a surrounding layer 7 of polyethylene and, helically wound in a single layer around the central reinforcing member, six electrically insulated elongate electric conductors 8 and four electrically insulated elongate metal reinforcing elements 12, the insulated electric conductors being divided into two groups of three conductors which are separated from one another by two groups of two insulated reinforcing elements; the insulated electric conductors and the insulated reinforcing elements are bound together by a helically lapped plastics tape 11. Each insulated electric conductor 8 consists of a single copper wire 9 insulated by a surrounding extruded layer 10 of polyethylene.Each insulated reinforcing element 12 consists of three stranded steel wires 13 insulated by a surrounding extruded layer 14 of polyethylene.
Embedded in the minor lobe 3 is an optical fibre element 15 consisting of a tube 16 of polyethylene which is separately formed with respect to the lobe and in which are loosely housed two optical fibres 17, each of a length greater than the length of the bore of the tube. The bore of the tube 16 is substantially filled throughout its length with a water-impermeable medium 18 of a grease-like nature.
The second preferred composite electric and optical cable shown in Figure 2 comprises a flexible elongate body 21 of extruded polyethylene having a transverse cross-section approximating to a figure-of-eight and consisting of a major lobe 22 of approximately circular transverse cross-section and a minor lobe 23 of approximately circular transverse cross-section joined together throughout their lengths by a web 24 integral with the lobes.
In the major lobe 22 there are embedded two electrically insulated elongate electric conductors 28 and five electrically insulated elongate metal reinforcing elements 32 twisted together. Each insulated electric conductor 28 consists of a single copper wire 29 insulated by a surrounding extruded layer 30 of polyvinyl chloride. Each insulated reinforcing element 32 consists of a steel wire 33 insulated by a surrounding extruded layer 34 of polyvinyl chloride.
An optical fibre element 35 embedded in the minor lobe 23 consists of a tube 36 of polyethylene which is separately formed with respect to the lobe and in which are loosely housed two optical fibres 37, each of a length greater than the length of the bore of the tube.
The bore of the tube 36 is substantially filled throughout its length with a water-impermeable medium 38 of a grease like nature.
The improved composite electric and optical cable of the present invention is especially suitable for use as a drop cable for extending between an aerial electric and optical cable installation and a building.
Claims (19)
1. A composite electric and optical cable comprising a flexible elongate body of extruded electrically insulating material having a transverse cross-section approximating to a figure-of-eight, wherein in one lobe of the 8-shaped elongate body there are embedded at least one elongate reinforcing element of high tensile strength and a plurality of electrically insulated elongate electric conductors and wherein in the other lobe of the 8-shaped elongate body there is disposed an optical fibre element comprising at least one optical fibre.
2. A composite electric and optical cable as claimed in Claim 1, wherein a central flexible elongate reinforcing element of high tensile strength embedded in said one lobe of the 8-shaped body has a plurality of electrically insulated elongate electric conductors of a metal or metal alloy of high electrical conductivity and a plurality of electrically insulated elongate reinforcing elements of metal or metal alloy extending helically around the central reinforcing element with their longitudinal axes lying on an imaginary cylinder of substantially circular cross-section concentric with the central longitudinal axis of the central reinforcing element.
3. A composite electric and optical cable as claimed in Claim 2, wherein the central flexible elongate reinforcing element is of metal and is electrically insulated with a layer of plastics insulating material.
4. A composite electric and optical cable as claimed
Claim 2, wherein the central flexible elongate reinforcing element is of aromatic polyamide or of a plastics material having non-metallic reinforcing filaments embedded therein.
5. A composite electric and optical cable as claimed in Claim 1, wherein a plurality of electrically insulated elongate electric conductors and a plurality of elongate reinforcing elements are twisted together and are embedded in said one lobe of the 8-shaped body.
6. A composite electric and optical cable as claimed in Claim 5, wherein each of said plurality of elongate reinforcing elements is of metal or metal alloy and is surrounded by a layer of plastics insulating material.
7. A composite electric and optical cable is claimed in Claim 3 or 6, wherein the or each elongate reinforcing element comprises at least one steel wire.
8. A composite electric and optical cable as claimed in any one of the preceding Claims, wherein each electric conductor is a single wire of copper or copper alloy.
9. A composite electric and optical cable as claimed in any one of the preceding Claims, wherein the plurality of electrically insulated elongate electric conductors includes one or more than one pair of insulated conductors twisted together and/or one or more than one quad of insulated conductors twisted together.
10. A composite electric and optical cable as claimed in any one of the preceding Claims, wherein the optical fibre element disposed in the other lobe of the 8-shaped elongate body is one or more than one tightly buffered optical fibre embedded in the lobe.
11. A composite electric and optical cable as claimed in any one of Claims 1 to 9, wherein said other lobe has at least one longitudinally extending bore in which is loosely housed at least one optical fibre.
12. A composite electric and optical cable as claimed in Claim 11, wherein said other lobe of the 8-shaped elongate body has a single bore extending throughout its length and centrally with respect to the lobe.
13. A composite electric and optical cable as claimed in Claim 12, wherein said single central bore is the bore of a tube of rubber or plastics material which is separately formed with respect to, and which is embedded in said other lobe of, the 8-shaped elongate body.
14. A composite electric and optical cable as claimed in Claim 11, wherein said other lobe of the 8-shaped elongate body has embedded in the lobe a plurality of tubes of rubber or plastics material separately formed with respect to the lobe, each of which tubes has at least one optical fibre loosely housed in its bore.
15. A composite electric and optical cable as claimed in Claim 14, wherein said plurality of separately formed tubes are helically laid around a central elongate reinforcing member of high tensile strength embedded in said lobe.
16. A composite electric and optical cable as claimed in any one of Claims 11 to 15, wherein the or each optical fibre has a length substantially greater than that of the bore in which it is loosely housed.
17. A composite electric and optical cable as claimed in any one of Claims 11 to 16, wherein the or each bore in which one or more than one optical fibre is loosely housed is substantially filled throughout its length with a water-impermeable medium of a grease-like nature.
18. A composite electric and optical cable as claimed in any one of the preceding Claims, wherein the flexible extruded elongate body is made of a plastics material.
19. A composite electric and optical cable substantially as hereinbefore described with reference to and as shown in Figure 1 or 2 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB898905738A GB8905738D0 (en) | 1989-03-14 | 1989-03-14 | Composite aerial cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9005501D0 GB9005501D0 (en) | 1990-05-09 |
| GB2230106A true GB2230106A (en) | 1990-10-10 |
Family
ID=10653240
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB898905738A Pending GB8905738D0 (en) | 1989-03-14 | 1989-03-14 | Composite aerial cable |
| GB9005501A Withdrawn GB2230106A (en) | 1989-03-14 | 1990-03-12 | Composite electric and optical aerial cable |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB898905738A Pending GB8905738D0 (en) | 1989-03-14 | 1989-03-14 | Composite aerial cable |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8905738D0 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0562770A2 (en) * | 1992-03-24 | 1993-09-29 | AT&T Corp. | Hybrid communications cable for enhancement of transmission capability |
| GB2270992A (en) * | 1992-08-04 | 1994-03-30 | Pirelli General Plc | Cable containing separable electrical conductors and optical fibres |
| WO2007134525A1 (en) * | 2006-05-23 | 2007-11-29 | Baoyi Yuan | An electro-optical cable |
| ES2343157A1 (en) * | 2008-01-16 | 2010-07-23 | Nordix, S.A. | Hybrid cable, siames and segregable for internal connection (Machine-translation by Google Translate, not legally binding) |
| WO2013000271A1 (en) * | 2011-06-30 | 2013-01-03 | 河南科信电缆有限公司 | Reinforced optical fiber composite high temperature resistant overhead insulated cable |
| CN103413616A (en) * | 2013-07-30 | 2013-11-27 | 成都亨通光通信有限公司 | Framework type 8-shaped photoelectric composite cable |
| CN105161165A (en) * | 2015-09-25 | 2015-12-16 | 苏州国华特种线材有限公司 | Splayed cable |
| WO2016188570A1 (en) | 2015-05-27 | 2016-12-01 | Prysmian S.P.A. | Aerial optical and electric cable assembly |
| CN114815103A (en) * | 2022-05-06 | 2022-07-29 | 富通集团有限公司 | 8-shaped optical cable |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4342500A (en) * | 1979-08-10 | 1982-08-03 | Siemens Aktiengesellschaft | High voltage stabile optical cable structures |
| EP0141002A1 (en) * | 1983-10-20 | 1985-05-15 | Pierre Henri André Bretegnier | Self-supporting cable consisting of a plurality of insulated conductors or tubes and a partially denuded support wire in a parallel direction, and die for coating such a cable |
| GB2169094A (en) * | 1984-12-19 | 1986-07-02 | Telephone Cables Ltd | Optical cables |
| GB2215080A (en) * | 1988-02-11 | 1989-09-13 | Stc Plc | Optical fibre cables |
-
1989
- 1989-03-14 GB GB898905738A patent/GB8905738D0/en active Pending
-
1990
- 1990-03-12 GB GB9005501A patent/GB2230106A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4342500A (en) * | 1979-08-10 | 1982-08-03 | Siemens Aktiengesellschaft | High voltage stabile optical cable structures |
| EP0141002A1 (en) * | 1983-10-20 | 1985-05-15 | Pierre Henri André Bretegnier | Self-supporting cable consisting of a plurality of insulated conductors or tubes and a partially denuded support wire in a parallel direction, and die for coating such a cable |
| GB2169094A (en) * | 1984-12-19 | 1986-07-02 | Telephone Cables Ltd | Optical cables |
| GB2215080A (en) * | 1988-02-11 | 1989-09-13 | Stc Plc | Optical fibre cables |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0562770A2 (en) * | 1992-03-24 | 1993-09-29 | AT&T Corp. | Hybrid communications cable for enhancement of transmission capability |
| EP0562770A3 (en) * | 1992-03-24 | 1993-12-15 | American Telephone & Telegraph | Hybrid communications cable for enhancement of transmission capability |
| CN1074158C (en) * | 1992-03-24 | 2001-10-31 | 美国电话及电报公司 | Hybrid communications cable for enhancement of transmission capability |
| GB2270992A (en) * | 1992-08-04 | 1994-03-30 | Pirelli General Plc | Cable containing separable electrical conductors and optical fibres |
| GB2270992B (en) * | 1992-08-04 | 1995-12-20 | Pirelli General Plc | Cables having electrical conductors and optical fibres |
| WO2007134525A1 (en) * | 2006-05-23 | 2007-11-29 | Baoyi Yuan | An electro-optical cable |
| ES2343157A1 (en) * | 2008-01-16 | 2010-07-23 | Nordix, S.A. | Hybrid cable, siames and segregable for internal connection (Machine-translation by Google Translate, not legally binding) |
| WO2013000271A1 (en) * | 2011-06-30 | 2013-01-03 | 河南科信电缆有限公司 | Reinforced optical fiber composite high temperature resistant overhead insulated cable |
| CN103413616A (en) * | 2013-07-30 | 2013-11-27 | 成都亨通光通信有限公司 | Framework type 8-shaped photoelectric composite cable |
| WO2016188570A1 (en) | 2015-05-27 | 2016-12-01 | Prysmian S.P.A. | Aerial optical and electric cable assembly |
| CN107667307A (en) * | 2015-05-27 | 2018-02-06 | 普睿司曼股份公司 | Aerial optical CA cable assembly |
| US10416402B2 (en) | 2015-05-27 | 2019-09-17 | Prysmian S.P.A. | Aerial optical and electric cable assembly |
| AU2015396467B2 (en) * | 2015-05-27 | 2021-03-25 | Prysmian S.P.A. | Aerial optical and electric cable assembly |
| CN107667307B (en) * | 2015-05-27 | 2021-10-08 | 普睿司曼股份公司 | Aerial optical cable assembly |
| CN105161165A (en) * | 2015-09-25 | 2015-12-16 | 苏州国华特种线材有限公司 | Splayed cable |
| CN114815103A (en) * | 2022-05-06 | 2022-07-29 | 富通集团有限公司 | 8-shaped optical cable |
| CN114815103B (en) * | 2022-05-06 | 2023-05-09 | 富通集团有限公司 | 8-shaped optical cable |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9005501D0 (en) | 1990-05-09 |
| GB8905738D0 (en) | 1989-04-26 |
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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) |