EP0146757A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Composite overhead cable
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1984-11-12
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Granted: —
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Expires: 2004-11-12
Abstract
Abstract An improved composite overhead stranded conductor obtained by providing an optical fiber cable in an overhead power line formed by stranding a plurality of conductors, or in an overhead earth wire which is extended in parallel with such an overhead power line. A spacer (3) having a plurality of axially extending helical grooves (1) formed in an outer surface thereof is positioned within a protective tube (4). Respective optical fibers (2) and/or optical bundles are received in each of the grooves (1). Each of the grooves (1) has a width substantially equal to the outer diameter of the optical fiber (2) and/or the optical bundles received therein so that movement of the optical fibers and/or the optical bundles in the grooves in the circumferential direction of the spacer is restricted.
Inventors
- 👤 Kitayama C/O Yokohama Works Of Yoshinobu
- 👤 Saito C/O Yokohama Works Of Yasunori
- 👤 Okano C/O Osaka Works Of Mikihiko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 05:37
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4416; G02B6/4422; G02B6/4407; G02B6/4429; G02B6/443
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
145 words
A composite overhead stranded conductor characterised by: a plurality of optical fibers (2) and/or optical bundles; a protective tube (4) enclosing said optical fibers (2) or bundles; a plurality of stranded conductors (6,7) of metal or metal alloy disposed around said protective tube (4); and a spacer (3) received in said protective tube (4), said spacer having a plurality of axially extending helical grooves (1) formed in an outer surface of said spacer (3), ones of said optical fibers (2) and/or said optical bundles being received in respective ones of said grooves (1), each of said helical grooves (1) having a width substantially equal to an outer diameter of the one of said optical fibers (2) and/or said optical bundles received therein, whereby said optical fibers (2) or bundles are restricted from movement in said grooves (1) in a circumferential direction of said spacer (3).
Claim 2
Dependent Claim
145 words
A composite overhead stranded conductor characterised by: a plurality of optical fibers (2) and/or optical bundles; a protective tube (4) enclosing said optical fibers (2) or bundles; a plurality of stranded conductors (6,7) of metal or metal alloy disposed around said protective tube (4); and a spacer (3) received in said protective tube (4), said spacer having a plurality of axially extending helical grooves (1) formed in an outer surface of said spacer (3), ones of said optical fibers (2) and/or said optical bundles being received in respective ones of said grooves (1), each of said helical grooves (1) having a width substantially equal to an outer diameter of the one of said optical fibers (2) and/or said optical bundles received therein, whereby said optical fibers (2) or bundles are restricted from movement in said grooves (1) in a circumferential direction of said spacer (3).
Claim 3
Dependent Claim
21 words
A composite overhead stranded conductor as claimed in claim 1 characterised in that said spacer (3) is made of a metal.
Claim 4
Dependent Claim
23 words
A composite overhead stranded conductor as claimed in claim 1 characterised in that said spacer (3) is made of a heat-resistant plastics material.
Claim 5
Dependent Claim
27 words
A composite overhead stranded conductor as claimed in any one of claims 1 to 3 characterised in that said protective tube (4) is made of a metal.
Claim 6
Dependent Claim
37 words
A composite overhead stranded conductor as claimed in any one of claims 1 to 4 characterised in that an inner diameter of said protective tube (4) is substantially equal to an outer diameter of said spacer (3).
Claim 7
Dependent Claim
36 words
A composite overhead stranded conductor as claimed in any one of claims 1 to 4 characterised in that an inner diameter of said protective tube (4) is larger than an outer diameter of said spacer (3).
Claim 8
Dependent Claim
63 words
A composite overhead stranded conductor as claimed in claim 5 or 6 characterised in that each of said stranded conductors is an aluminum-clad steel wire strand (7), and in that said aluminum-clad steel wire strands (7) are substantially wedge-shaped in cross- section so that adjacent ones of said aluminum-clad steel wire strands are intimately contacted with each other to provide a bridge effect.
Claim 9
Dependent Claim
42 words
A composite overhead stranded conductor as claimed in claim 5 or 6 characterised in that the outer diameter of said spacer (3) is equal to or smaller than twice the outer diameter of any one of said aluminum-clad steel wire strands (6).
Claim 10
Dependent Claim
52 words
A composite overhead stranded conductor as claimed in any one of claims 1 to 8 characterised in that each of said grooves (1) has a rounded bottom portion having a radius of curvature substantially equal to a radius of said one of said optical fibers (2) and/or said optical bundles received therein.
References Cited (Backward Citations)
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