EP0158855A2
Expired / Lapsed
EP
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Composite overhead stranded conductor
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1985-03-21
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Granted: —
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Expires: 2005-03-21
Abstract
Abstract A composite optical fiber overhead cable having improved long-term strength and loss characteristics. A plurality of optical fibers are accommodated in spiral grooves of the spacer around which conductor strands are wound. The fibers contain fluorine in at least one of the core and cladding layers thereof. Each of the optical fibers is provided with a surrounding hermetic coat, and a heat-resistant elastic material is filled between each optical fiber and the bottom of its respective groove to restrain movement of the optical fibers in the grooves in the longitudinal direction.
Inventors
- 👤 Yoshinobu C/O Yokohama Works Kitayama
- 👤 Yasunori C/O Yokohama Works Saito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 23:59
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4415; G02B6/4416; G02B6/4422; G02B6/4429; G02B6/44382
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A composite overhead stranded conductor comprising a plurality of stranded conductors wound around an optical fiber protective tube which has a plurality of optical fibers and/or optical bundles accommodated therein, the improvement wherein a spacer having spiral grooves formed in its periphery is accommodated in said protective tube, said optical fibers and/or optical bundles composed of a plurality of said optical fibers being accommodated in said spiral grooves, and said fibers containing fluorine in at least one of a core and cladding thereof.
Claim 2
Dependent Claim
83 words
A composite overhead stranded conductor comprising a plurality of stranded conductors wound around an optical fiber protective tube which has a plurality of optical fibers and/or optical bundles accommodated therein, the improvement wherein a spacer having spiral grooves formed in its periphery is accommodated in said protective tube, said optical fibers and/or optical bundles composed of a plurality of said optical fibers being accommodated in said spiral grooves, and said fibers containing fluorine in at least one of a core and cladding thereof.
Claim 3
Dependent Claim
22 words
The composite overhead stranded conductor according to claim 1, wherein each of said optical fibers is provided with a surrounding hermetic coat.
Claim 4
Dependent Claim
52 words
The composite overhead stranded conductor according to claim 1, wherein a heat-resistant elastic material is filled between each optical fiber and the bottom of each groove and/or between each optical bundle and the bottom of each groove so that said optical fibers in said grooves are restrained in a longitudinal direction thereof.
Claim 5
Dependent Claim
19 words
The composite overhead stranded conductor according to claim 1, wherein each of said optical fibers is coated with aluminum.
Claim 6
Dependent Claim
27 words
The composite overhead stranded conductor according to claim 1, wherein each of said optical fibers has a coat of aluminum with a thickness of approximately 25 microns.
Claim 7
Dependent Claim
34 words
The composite overhead stranded conductor according to claim 2, wherein said hermetic coat is formed of a material selected from the group consisting of metals and oxides of metals having a high melting point.
Claim 8
Dependent Claim
18 words
The composite overhead stranded conductor according to claim 2, wherein said hermetic coat is made of silicon nitride.
Claim 9
Dependent Claim
27 words
The composite overhead stranded conductor according to claim 3, wherein said elastic material comprises a material selected from the group consisting of silicone resin and silicone rubber.
References Cited (Backward Citations)
No citation records indexed.
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