EP0169647A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Optical fibre cables
Assignee: Telephone Cables Ltd
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Filing: 1985-06-12
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Granted: —
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Expires: 2005-06-12
Abstract
Abstract An optical fibre cable has a plurality of longitudinally extending closed channels (6) formed in a protective cover, and each bonded by part of the outer wall (5) of the cover, wherein said wall (5) is formed with at least one region (8) of reduced thickness extending along a channel (6) so as to form a line of weakness which facilitates penetration of the cover to give access to the optical fibre (7) or fibres within the channel (6). A rip cord (9) may be embedded in the wall (5) so that by pulling the rip cord (9) a slit (10) is formedin the wall (8).
Inventors
- 👤 Clifford Heywood
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 13:22
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4407; G02B6/4429; G02B6/443; G02B6/4431
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
An optical cable comprising a central core, an outer wall surrounding the core and a plurality of longitudinally extending partitions between the core and the outer wall to define between them a plurality of longitudinally extending channels at least one of which provides accommodation for one or more optical fibres, characterised in that said outer wall is formed with at least one region of reduced thickness extending longitudinally along a said channel thereby forming a line of weakness which facilitates penetration of the wall to give access to the channel.
Claim 2
Dependent Claim
90 words
An optical cable comprising a central core, an outer wall surrounding the core and a plurality of longitudinally extending partitions between the core and the outer wall to define between them a plurality of longitudinally extending channels at least one of which provides accommodation for one or more optical fibres, characterised in that said outer wall is formed with at least one region of reduced thickness extending longitudinally along a said channel thereby forming a line of weakness which facilitates penetration of the wall to give access to the channel.
Claim 3
Dependent Claim
22 words
An optical cable according to Claim 1 wherein a region of reduced thickness is provided extending longitudinally along each of said channels.
Claim 4
Dependent Claim
30 words
An optical cable according to either Claim 1 or Claim 2 wherein a rip cord is located adjacent the inner surface of the or each said region of reduced thickness.
Claim 5
Dependent Claim
60 words
An optical cable according to either Claim 1 or Claim 2 wherein two such regions of reduced thickness are provided extending longitudinally along the or each channel, the two regions defining a strip which, in use, may be pulled away from the rest of the outer wall to leave a slot in the outer wall providing access to the channel.
Claim 6
Dependent Claim
27 words
An optical cable according to any preceding Claim wherein said central core, outer wall and fins are formed in one piece as an extrusion of thermoplastics material.
Claim 7
Dependent Claim
16 words
An optical cable according to any preceding Claim wherein said central core contains a strength member.
Claim 8
Dependent Claim
19 words
An optical cable according to any preceding Claim wherein at least one of said channels contains a water-repellent medium.
References Cited (Backward Citations)
EP0020036A1
Cited
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