Wing Chu Liu

US Patent:

51310643, Jul 14, 1992

Filed:

Feb 19, 1991

Appl. No.:

7/657696

Inventors:

Candido J. Arroyo - Lithonia GA
Nathan E. Hardwick - Dunwoody GA
Michael D. Kinard - Lawrenceville GA
Wing S. Liu - Lawrenceville GA
Parbhubhai D. Patel - Dunwoody GA
Walter J. Paucke - Tucker GA
Phillip M. Thomas - Suwanee GA

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

G02B 644

US Classification:

385102

Abstract:

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.

US Patent:

53513711, Oct 4, 1994

Filed:

May 26, 1993

Appl. No.:

8/017558

Inventors:

George F. DeVeau - Stone Mountain GA
Monty J. Edwards - Chamblee GA
Wing S. Liu - Lawrenceville GA
Charles McGonigal - Grayson GA

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

A44B 2100

US Classification:

24561

Abstract:

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.

US Patent:

52206300, Jun 15, 1993

Filed:

May 12, 1992

Appl. No.:

7/881923

Inventors:

George F. DeVeau - Stone Mountain GA
Monty J. Edwards - Chamblee GA
Wing S. Liu - Lawrenceville GA
Charles McGonigal - Grayson GA

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

G02B 600
G02B 636

US Classification:

385 64

Abstract:

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.