British Telecommunications Public Limited Company

Miniflex Limited

British Telecommunications Corporation

Pirelli General Plc

The Post Office

Other

Gpt Limited

Telephone Cables Limited

Peter D Jenkins

Paul F Wettengel

Simon Charles Benton

Mark G Graveston

Laurence Llewellyn

Ispran Sharma Kandasamy

Peter George Hale

Daniel Owen Jenkins

Philip Alfred Barker

David J Stockton

Roger E Jung

Christopher Fisk

James Edwin Cosier

Brian Gregory

John Kerry

Anthony John Stockman

Nicholas J Medlen

Stephen John Hough

Bruce Wiltshire

A caterpillar traction apparatus (), wherein two pairs of pulleys (&&) can be driven at different speeds, so that the linear member () being driven by the mechanism is subjected to either compression or extension forces.

Caterpillar traction apparatus

The present invention provides an apparatus () for forming circumferential grooves () in the exterior surface of a linear member (), such as a tube. The grooves are formed by rotating a cylindrical cutting element () around the tube such that cutting means in the cylindrical cutting element form the grooves. One rotation of the cylindrical cutting element causes multiple grooves to be formed in the surface of the tubes.

Apparatus and method for forming annular grooves on the outer surface of a cable or tube

The present invention relates to an optical fiber connector, and in particular to a Subscriber Connector (SC)-type push/pull optical fiber connector and to a method of forming and using such a connector. The SC-type optical fiber connector () is made up of an optical fiber (), a cylindrical ferrule (), a ferrule holder (), a spring biasing means (), a ferrule holder carrier (), an inner housing (), and an outer housing (). The optical fiber () is held within the ferrule () and the ferrule () is held by the ferrule holder (). The ferrule holder () is engaged within a receiving portion () of the ferrule holder carrier (), said holder and carrier being relatively moveable with respect to each other along the ferrule axis () between limits defined by an interaction between the ferrule carrier () and the ferrule holder ().

Optical fibre connector

A linear member () comprises a first layer () and a second layer (), the second layer being arranged around the first layer. The second layer comprises a series of annular grooves (). The material for the second layer is substantially stronger than the material for the first layer.

Linear member

Apparatus and method for preparing cylindrical surfaces

Slice tray with an adaptor having windows

Cable routing device

In an optical fibre clamping device to prevent relative movement between an optical fibre and a tube within which the optical fibre is located, a body part includes a through passageway to receive the optical fibre. The body part includes a first clamp to engage the tube and a second clamp to engage the optical fibre.

Optical fibre clamping device

Drop cable

Assembly for use in connecting optical fibres including a manifold device

Assembly for use in connecting optical fibers having pivotally mounted

A system for installation of optical fibre transmission lines into ducts by feeding coiled optical fibre packages from a container with an annular configuration. The optical fibre package comprises filamentary material coiled into a series of turns each offset from preceding turns and containing 360 degrees of torsion.

Fibre coiling

A system for guiding optical fibres comprises a device which includes a plurality of units, each of which defines a row of ducts extending from a first end of the unit to a second end thereof for guiding optical fibres. The units are arranged successively in overlapping relationship with their first ends in substantial alignment at an end portion of the device and their second ends being spaced apart at successively increasing distances from the device end portion.

Guiding optical fibres

A system for installation of optical fibre transmission lines into ducts by feeding coiled optical fibre packages from a container with an annular configuration. The optical fibre package comprises filamentary material coiled into a series of turns each offset from preceeding turns and containing 360 degrees of torsion.

An optical fibre package suitable for installation using a fibre blowing process includes at least one optical fibre, an inner coating about said fibre, and an outer resin coating about said inner coating, said resin coating including a significant plurality of particulate inclusions at least 10 .mu.m across, wherein the concentration of the particulate inclusions is significantly greater at the outer surface of the resin coating than at the inner limit of the resin coating. The inclusions may be hollow glass microspheres or mica flakes. The relative absence of significant particulate inclusions at the inner limit of the resin coating improves the mechanical particulate of the fibre package relative to similar known packages. The presence of significant inclusions at the outer surface of the resin coating tends, during a blowing process, to increase viscous drag effects and to reduce friction between the package and the duct into which the package is blown, thereby enhancing blowability.

Optical fibres for blown installation

Growing community of inventors

Woodbridge, United Kingdom

Peter D Jenkins