James David Holman

US Patent:

56849109, Nov 4, 1997

Filed:

Jun 24, 1996

Appl. No.:

8/669119

Inventors:

John Thomas Chapin - Alpharetta GA
Lionell Graham - Snellville GA
James Robert Holman - Lilburn GA
Montri Viriyayuthakorn - Norcross GA

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

G02B 602
G02B 622

US Classification:

385128

Abstract:

A buffered optical fiber (20) includes an optical fiber (21) comprising a core and a cladding. Typically, the optical fiber is enclosed by at least one layer (23) of coating material. The optical fiber is enclosed by a plastic buffer layer (30). Interposed between the optical fiber and the buffer layer is a boundary layer (40). Importantly, the boundary layer of the present invention is a low modulus material applied as a substantially thick layer relative to the buffer layer. In a preferred embodiment, the wall thickness of the boundary layer is about one-forth to one-third the wall thickness of the buffer layer. However, depending on the particular materials selected for the buffer and boundary layer, the wall thickness of the boundary layer can be as thin as one-twenty-fifth (1/25) of the buffer layer. As a result of the present design, there is sufficient adhesion between the buffer layer and the underlying coating material to maintain the buffer layer in place during normal use of the buffered optical fiber. On the other hand, the adhesion is low enough so that the buffer layer may be removed upon the application of reasonably low mechanical stripping forces.

US Patent:

47814330, Nov 1, 1988

Filed:

Dec 22, 1986

Appl. No.:

6/946646

Inventors:

Candido J. Arroyo - Lilburn GA
Jay T. Loadholt - Roswell GA
Emanuele Scalco - Martinsville NJ
James R. Holman - Lilburn GA
Palmer D. Thomas - Tucker GA

Assignee:

American Telephone and Telegraph Company, AT&T Bell Laboratories - Murray Hill NJ
AT&T Technologies, Inc. - Berkeley Heights NJ

International Classification:

G02B 644

US Classification:

350 9623

Abstract:

An optical fiber cable particularly suited for use in building distribution systems includes a core which comprises a plurality of coated optical fibers (22--22) with each being enclosed in a plastic buffer (26). The optical fibers are individually or collectively enclosed in a fibrous strength member. Over the strength member in each of several embodiments is provided an outer jacket comprising a plastic material having excellent resistance to flame spread and smoke evolution. The plastic material comprising the jacket is disposed about the strength member and decoupled sufficiently therefrom to avoid the introduction of microbending stresses in the optical fiber. This may be accomplished by vacuum sizing the plastic material which has been tubed over an advancing optical fiber core as the plastic material is being drawn down onto the strength member.

US Patent:

50509578, Sep 24, 1991

Filed:

Apr 27, 1990

Appl. No.:

7/515981

Inventors:

Alfred S. Hamilton - Norcross GA
James R. Holman - Lilburn GA
Michael D. Kinard - Lawrenceville GA
Terry D. Mathis - Lilburn GA

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

G02B 644

US Classification:

385113

Abstract:

An optical fiber cable (20) which is suitable for service from a distribution closure to a customer's premises includes a transmission media core (21) enclosed in a relatively rigid tubular member (40). The relatively rigid tubular member is enclosed in a jacket (44) comprising a plastic material which has a cut-through resistance which is substantially less than that of the tubular member. Interposed between the tubular member and an outer surface of the jacket is a strength member system comprising two yarn-like longitudinally extending strength member groups (52--52). The strength member grops are diametrically opposed to each other and are disposed in engagement with the tubular member.

US Patent:

53455258, Sep 6, 1994

Filed:

Jan 28, 1992

Appl. No.:

7/826740

Inventors:

James R. Holman - Lilburn GA
Terry D. Mathis - Lilburn GA
Parry A. Moss - Stone Mountain GA

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

G02B 644

US Classification:

385104

Abstract:

An optical fiber cable (20) includes a core (22) which includes a plurality of bundles (31, 31 ) of optical fiber (24) and a yarn-like strength member system (35) which is wrapped with an oscillated or unidirectional lay about the optical fibers. The strength member system also provides impact resistance for the fibers. A jacket (40) which may include a flame-resistant plastic material encloses the core with the outer diameter of the jacket being substantially less than that of typical optical fiber cables. Portions of the strength member system contact an inner surface of the jacket, an outer surface of which is the outer surface of the cable.

US Patent:

60687967, May 30, 2000

Filed:

Dec 10, 1998

Appl. No.:

9/208708

Inventors:

Lionell Graham - Norcross GA
James Robert Holman - Lilburn GA
Terry Don Mathis - Lilburn GA
Montri Viriyayuthakorn - Norcross GA

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

B29D 1100

US Classification:

264 128

Abstract:

A simplex optical fiber cable of this invention includes an optical fiber, a buffer preferably of nylon, surrounding and in contact with the optical fiber, a yarn layer with strength fibers, preferably aramid fibers, disposed about the buffer and a sheath preferably formed of polyvinyl chloride (PVC) surrounding and in contact with the yarn layer. In cross-section, the simplex optical fiber cable has a diameter less than 2. 0 millimeters (mm), and thus is much smaller in diameter than optical fiber cables presently available. Preferably, if the buffer is relatively tin providing limited protection to the optical fiber, a slick substance such as talc is applied to an outer surface of the buffer before the yam layer is disposed thereon. The slick substance allows the buffer of the optical fiber to slide to a degree in contact with the yarn layer and thus reduces fatigue caused by axial movement of a ferrule of the connector terminating the optical fiber cable. On the other hand, if the buffer is relatively thick, a friction-reducing substance such as Modaflo. TM.

US Patent:

43996027, Aug 23, 1983

Filed:

Jul 28, 1981

Appl. No.:

6/287619

Inventors:

David S. Hancock - Roswell GA
James R. Holman - Lilburn GA

Assignee:

Western Electric Company, Inc. - New York NY

International Classification:

B23P 1900

US Classification:

294264

Abstract:

A method is disclosed for removing an end cap from a telecommunications cable wherein a circumferential incision and a plurality of longitudinal incisions are made with a wire in segmenting the cap.