International Standard Electric Corporation

Itt Industries, Inc.

Michael James Phillips

Aubrey M Crick

John D Archer

John David Archer

A watch pierced bearing jewel forms the end of a sheathed optical fiber termination. The jewel is located on axis of a ferrule. The fiber is threaded through the jewel aperture and cemented in position. The jewel and ferrule may be held concentric in a resilient molded jig during assembly of the fiber thereto.

Termination of optical fibers

An optical fiber splice is formed by means of a pair of watch jewels concentrically aligned within a cylindrical ferrule. The plastic is stripped back from a pair of fibers to expose their cores and each core is inserted into one of the jewels for precise alignment.

Optical fiber splice

An optical fiber connector assembly employs a tubular alignment portion in which two watch jewels, one fitted to each fiber end, are aligned. The jewels are mounted on the ends of ferrules and have diameters greater than that of the ferrules so that alignment of the fibers is made off the jewels rather than the ferrules.

Terminating optical fibers and optical fiber connector

A method of holding the bared end of a plastic sheathed optical fiber accurately on axis of a metal ferrule through which it is threaded while a potting compound is cured which cements the assembly. The method uses a silicone rubber jig cast from an accurately machined mold. The resilience of the jig enables variations in diameter to be accommodated so that holes for locating the ferrule and the bared fiber end need to be coaxial, but their size is not critical. Many jigs can be cast from a single mold reducing costs and increasing output as compared with prior methods.

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Stanstead, United Kingdom

Michael James Phillips