International Telephone and Telegraph Corporation

U.S. Holding Co., Inc.

Hans E Heinzer

Oswald R Reh

Donald L Taylor

During the formation of an optical fiber coil on an elongated rotationally symmetrical support element, the tension applied to the optical fiber as it is being wound into the coil is gradually or incrementally decreased as the superimposed layers of the optical fiber coil are being deposited on top of one another in the radially outward direction. Thus, the force applied to the fiber as it approaches the take-up location on the support element to achieve the desired longitudinal tension in the optical fiber may decrease from the range substantially betwen 150 to 300 grams initially to the range of substantially between 50 and 70 grams as the optical fiber coil nears completion. An apparatus for winding the optical fiber coil includes the arrangements needed for monitoring the progress of the winding operation and for adjusting the various parameters of such operation accordingly. An optical fiber coil arrangement obtained in this manner has very low optical losses even at extreme temperatures.

Method of and apparatus for winding a precision optical fiber coil

An arrangement for storing a coil of optical fiber prior to and during an inner peel deployment of the optical fiber from the coil comprises an outer aluminum casing, a body of solid foam material in the interior of the casing, and a barrier sheet in the interface, between the foam body and the coil of optical fiber. The foam body is formed in situ in a confining space outwardly and axially delimited by the casing and inwardly delimited by the barrier sheet and by two end lids, by introducing the material of the body into the enclosed space through openings in the casing and letting the material foam and cure in the spacing. During the formation of the body, the coil of optical fiber is supported on a mandrel which is, in turn coaxially supported on the end lids. After the foamed material has solidified, the end lids and the mandrel can be removed and the arrangement is now ready for inner peel deployment of the optical fiber therefrom.

Optical fiber coil storage arrangement and a method of manufacturing the

Termination device for anchoring a fiber optic cable, especially in a fiber optic cable submarine signaling system wherein the cable must be periodically interrupted and anchored to the housing of a repeater, or the like. A central cable or strength member of steel, for example, is built into the cable along with a plurality of optical fibers. A compression block accepts the cable through an axial bore which flares out into a conical shape. A pressure cone has an axially slotted wall to form a plurality of tines which tend to compress radially inward against the strength member of the cable actually inserted therein when the cone is axially compressed into the conical cavity of the pressure block. Individual optical fiber passages through the compression block flare out from the small end of the conical cavity and pressure cone. The compression block fits into a cup of insulating material, the cable entering through a bore in the closed end of the cup. The insulating cup electrically isolates the compression block and pressure cone assembly which would normally be of a conductive metallic material from the housing of the repeater assembly, etc., into which the entire assembly is mechanically fitted. The pressure cone is held within the compression block by a circle of bolts and a torsion resisting bolt holds the compression block in the congruent cavity of the cup.

Fiber optic electromechanical submarine cable termination

A device for use in submarine cable systems, particularly for fiber optic cable systems. A water-tight enclosure or housing is provided which is accessible for maintenance purposes. The device, which is of generally tubular shape, provides termination chambers at either end attached to bulkhead members for the introduction of cables and their mechanical termination therein. The fiber optic elements themselves are passed through the bulkhead members in penetrator subassemblies to reach the interior chamber. An axially split cylindrical shell has at least two arcuate members which fit together and nest on circumferential shoulders on the bulkhead members which have radial depths equal to the material thickness of the arcuate members. An outer sleeve slides axially over this assembly, circumferential seals providing water-tight contact between the outer sleeve and the bulkhead members. Axial pressure against the bulkhead members is resisted by axial compression of the split-shell members nested in the bulkhead member annular shoulders. Radially inwardly directed forces are resisted by the outer sleeve itself primarily. A plurality of shear bolts further fixes the outer sleeve (against tensile and torsional forces) to each of the bulkhead members.

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Roanoke, VA, United States of America

Hans E Heinzer