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US 2003/0156803 A1Published application
Signal transmitting cable
AssigneeEmtelle UK Limited
InventorsGeorge Henry Platt Brown, David John Stockton, Jonathan Paul Taylor
Life of this patent
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AssigneeEmtelle UK Limited
InventorsGeorge Henry Platt Brown, David John Stockton, Jonathan Paul Taylor
Estimating the term…
An optical fibre cable (1) for installation in a duct (51) by means of fluid flow is described. The cable (1) has a signal transmitting portion comprising a plurality of elongate, flexible optical fibres, surrounded by a braided covering (10) formed from textile yarns (9). The apparatus (50) for installing the cable includes an air compressor (52) for supplying a blowing head (53) with a conditioned air supply substantially free of static electricity or moisture. The blowing head (53) includes drive wheels (not shown), the speed of rotation of which (and hence the speed of installation of the fibre cable (1), (101) is adjusted by means of s control unit (54) powered by power supply (55). The fibre cable (1), (101) is fed from a fibre pan (56) over guide (57) to the blowing head (53), which is fed with an air supply from compressor (52) which is regulated by dispenser (58).
A signal transmitting cable for installation in a duct by means of fluid flow, the cable comprising:
A cable according to any one of the preceding claims, wherein said first average spacing is arranged such that the air drag imparted to a section of the cable in use during blowing into a tube exceeds
A cable according to any one of the preceding claims, wherein said first average spacing is less than substantially 30 mm.
A cable according to any one of the preceding claims, wherein said covering comprises at least one coating of material, and said first set of protrusions and/or depressions is provided on the outermost said coating.
A cable according to any one of the preceding claims, wherein said covering comprises at least one intermittent coating of material, and said second set of protrusions is provided on the outermost said intermittent coating.
A cable according to any one of the preceding claims, wherein at least one said signal transmitting member is an optical signal transmitting member.
A cable according to any one of the preceding claims, wherein at least one said signal transmitting member is a conductor for transmitting an electrical signal.
A cable according to any one of the preceding claims, further comprising at least one sheath surrounding at least one said signal transmitting member.
A cable according to any one of the preceding claims, comprising a plurality of said signal transmitting members, and an adhesive layer arranged between at least one pair of adjacent said signal transmitting members.
A cable according to any one of the preceding claims, wherein said second set of protrusions is provided with a friction reducing coating.
A signal transmitting cable for installation in a duct by means of fluid flow, the cable substantially as hereinbefore described with reference to the accompanying drawings
A method of forming a signal transmitting cable according to any one of the preceding claims, the method comprising forming said covering around said signal transmitting portion.
A method according to any one of claims 30 to 44, wherein said first set of protrusions and/or depressions and/or said second set of protrusions are arranged helically around said covering.
Dependencies are inferred from the claim text.