At&t Bell Laboratories

American Telephone & Telegraph Co., At&t Bell Laboratories

Wing S Liu

Charles McGonigal

George F DeVeau

Monty J Edwards

Candido J Arroyo

Parbhubhai D Patel

Michael D Kinard

Phillip Maurice Thomas

Nathan E Hardwick, Iii

Walter J Paucke

An optical fiber splicing device includes a clip (20) which aligns and secures cylindrical rods (28, 30 and 32) utilized within a three-rod optical fiber splicing device. The clip (20) is a generally cylindrically shaped component which is made of a resilient material and is positionable so as to encase three cylindrical rods (28, 30 and 32). The clip (20) comprises a circular body portion (22) and two protruding leg portions (24 and 26) which extend from an point on the outer periphery of clip body (22). The two leg portions (24 and 26) are constructed and oriented such that they may be manipulated to controllably expand the inner diameter of clip body (22). To facilitate an optical fiber splice or connection, the clip (20) of the present invention allows the clip body (22) to be expanded to loosen the grip on rods (28, 30 and 32) held therein, thereby allowing the optical fiber ends to be inserted between the rods. Additionally, the inner periphery of clip body (22) is adapted with a plurality of dimple pairs precisely aligned to assure proper longitudinal alignment of the three rods for an efficient and effective splice.

Rod-securing clip for use in optical fiber three-rod connectors

Optical fiber three-rod connector having a rod-securing clip

A communications cable for use in buried environments in an outside plant includes a core (22) comprising at least one transmission medium and a mechanically strengthened, thermal resistant barrier layer (40) disposed about a plastic tubular member (23). A metallic shield (32) and a plastic jacket (36) are disposed about the barrier. The barrier layer may comprise a tape (41) which is made of a material such as woven glass or an aramid fibrous material, for example, which is resistant to relatively high temperatures, which has suitable strength properties in all directions and at elevated temperatures and which is characterized by properties which cause the barrier layer to impede the passage therethrough of particles which are sufficiently large to cause damage to the core. In a preferred embodiment, the thermal barrier layer also includes provisions for preventing the longitudinal flow of water within the cable. Such a waterblocking capability may be provided by a barrier layer comprising a laminate comprising a high temperature resistant tape and at least one other tape with a superabsorbent powder therebetween or another tape which has been impregnated with a superabsorbent material.

Cable having lightning protective sheath system

There is disclosed a connector for two terminal plugs having bores in which are recieved respective optical fibers having free ends terminating at the front ends of such plugs. The connector comprises a longitudinal sleeve of sheet metal having a bottom, back and top and a longitudinal opening at its front. The sleeve contains a guide disposed alongside a longitudinal passage through the sleeve for receiving the two plugs end-to-end. The sleeve top is divided by lateral slits into two central resilient fingers and two resilient tabs at the sleeve ends. The fingers exert forces to press the end-to-end plugs against the guide to align them, while the tabs exert greater forces on the guide to maintain it clamped with the sleeve. The slits extend part way down the back of the sleeve, the guide has beveled edges, and the mentioned opening is bordered by top and bottom lips adapted to be pried apart by a pliers tool.

Optical fiber terminal plug connectors

Growing community of inventors

Lawrenceville, GA, United States of America

Wing S Liu