Ralph J Darsey

52058905, Apr 27, 1993

Sep 11, 1991

7/758172

Ralph J. Darsey - Lawrenceville GA
John W. Shea - Chamblee GA
Carl R. Taylor - Lawrenceville GA

AT&T Bell Laboratories - Murray Hill NJ

B65H 5500
B65H 5504

156169

An optical fiber package (52) includes a length of optical fiber (22) wound in a plurality of convolutions on a bobbin (50). In order to maintain the convolutions in a precision wound package and to prevent snags during payout, it is necessary that each convolution of optical fiber be adhered to at least a portion of an adjacent convolution. This is accomplished by providing the length of optical fiber with an adhesive material (32) which is not tacky at room temperature but which becomes tacky at a predetermined temperature. After the convolutions have been wound on the bobbin, the bobbin is treated to cause the adhesive material to become tacky and cause each convolution to adhere to at least a portion of adjacent convolutions. Suitable adhesion is caused to occur with any adhesive material for which molecular bonding can occur across the interface between contiguous portions of adjacent convolutions as a result of suitable treatment. The adhesion between convolutions is sufficient to cause a precision wound package to be maintained, but is such as to allow separation of each convolution from an adjacent convolution during payout without the occurrence of breaks.

49500490, Aug 21, 1990

Feb 28, 1989

7/316615

Ralph J. Darsey - Lawrenceville GA
John W. Shea - Chamblee GA
Carl R. Taylor - Lawrenceville GA

AT&T Bell Laboratories - Murray Hill NJ

G02B 610
B05D 506
B32B 3100

350 9630

An optical fiber package (52) includes a length of optical fiber (22) wound in a plurality of convolutions on a bobbin (50). In order to maintain the convolutions in a precision wound package and to prevent snags during payout, it is necessary that each convolution of optical fiber be adhered to at least a portion of an adjacent convolution. This is accomplished by providing the length of optical fiber with an adhesive material (32) which is not tacky at room temperature but which becomes tacky at a predetermined temperature. After the convolutions have been wound on the bobbin, the bobbin is treated to cause the adhesive material to become tacky and cause each convolution to adhere to at least a portion of adjacent convolutions. Suitable adhesion is caused to occur with any adhesive material for which molecular bonding can occur across the interface between contiguous portions of adjacent convolutions as a result of suitable treatment. The adhesion between convolutions is sufficient to cause a precision wound package to be maintained, but is such as to allow separation of each convolution from an adjacent convolution during payout without the occurrence of breaks.

50333895, Jul 23, 1991

Mar 26, 1990

7/499105

Ralph J. Darsey - Lawrenceville GA
John W. Shea - Chamblee GA
Carl R. Taylor - Lawrenceville GA

AT&T Bell Laboratories - Murray Hill NJ

F41G 732
F42B 1504

102504

An optical fiber package (52) includes a length of optical fiber (22) wound in a plurality of convolutions on a bobbin (50). In order to maintain the convolutions in a precision wound package and to prevent snags during payout, it is necessary that each convolution of optical fiber be adhered to at least a portion of an adjacent convolution. This is accomplished by providing the length of optical fiber with an adhesive material (32) which is not tacky at room temperature but which becomes tacky at a predetermined temperature. After the convolutions have been wound on the bobbin, the bobbin is treated to cause the adhesive material to become tacky and cause each convolution to adhere to at least a portion of adjacent convolutions. Suitable adhesion is caused to occur with any adhesive material for which molecular bonding can occur across the interface between contiguous portions of adjacent convolutions as a result of suitable treatment. The adhesion between convolutions is sufficient to cause a precision wound package to be maintained, but is such as to allow separation of each convolution from an adjacent convolution during payout without the occurrence of breaks.

55582877, Sep 24, 1996

Feb 2, 1995

8/382745

Ralph J. Darsey - Lawrenceville GA
Gregory D. Horne - Stone Mountain GA

Lucent Technologies Inc. - Murray Hill NJ

B65H 5400
B65H 5700

242 18R

An apparatus and method for reducing or preventing damage to a strand wound at relatively high speed on a machine-rotated spool, caused by flailing of a loose end of the strand includes capture brushes arranged at intervals in proximity to the machine. The capture brushes are aligned to be approximately perpendicular to the loose end of the strand when the loose end of the strand rotates with the spool into contact with the brushes. At respective ends, the brushes have respective tips with a taper that tends to guide or deflect the loose end of the strand to a slot defined by two adjacent brushes. The brushes have bristles extending from a bristle-mounting member, which capture the loose end of the strand. The bristles can be treated with a friction enhancing substance to improve the ability of the brushes to capture and entrap the loose end of the strand. Preferably, the bristles are angled with respect to the bristle-mounting member in a direction away from a respective tapered tip.

52610233, Nov 9, 1993

Jun 30, 1992

7/906979

Ralph J. Darsey - Lawrenceville GA

AT&T Bell Laboratories - Murray Hill NJ

G02B 610

385134

An optical fiber package of this invention applies a friction enhancing material to the smooth surface of a bobbin or mandrel onto which the optical fiber is wound. The friction enhancing material adheres the initial layer of fiber to the smooth surface of the bobbin, thereby eliminating the need for an independent base structure for establishing and maintaining a winding path for the fiber. Furthermore, the friction enhancing material prevents the lateral movement at initial layer of fiber relative to the bobbin. In accordance with the present invention, the friction enhancing material is preferably a plastic material such as room temperature vulcanized (RTV) silicones and Styrene Butadiene Rubber (SBR) or the like. In addition, the optical fiber package of this invention may combine the use of both a friction enhancing material between the initial fiber layer and the bobbin, as well as an adhesive material coating applied along the length of the optical fiber. Accordingly, a stable package of elongated optical fiber strand material is established which may be used in situations or environments requiring rapid payout of the fiber without adversely effecting either the physical or the communicational properties of the fiber.

43199402, Mar 16, 1982

Feb 17, 1981

6/235362

Candido J. Arroyo - Lilburn GA
Nicholas J. Cogelia - Duluth GA
Ralph J. Darsey - Lawrenceville GA

Bell Telephone Laboratories, Incorporated - Murray Hill NJ
Western Electric Company, Inc. - New York NY

H01B 1326
H01B 734

156 56

A method of making a cable (20) specially suited for use in building plenums because of its low flame spread and smoke evolution includes enclosing a multiconductor core (22) in a sheath comprising an inorganic, cellular core wrap (31), a corrugated metallic barrier (40) and dual layers (51) and (52) of a polyimide tape. The tapes are wrapped helically about the barrier in a manner that avoids a compression of the core wrap. The sheath is effective to resist heat transfer inwardly toward the core by conduction while the metallic barrier reflects radiant heat. Advantageously, the sheath containerizes the core without unduly compressing it and thereby allows the intumescence of conductor insulation during a fire to form char which is effective to suppress the evolution of smoke and the propagation of flame.

45103488, Apr 9, 1985

Mar 28, 1983

6/479249

Candido J. Arroyo - Lilburn GA
Nicholas J. Cogelia - Duluth GA
Ralph J. Darsey - Lawrenceville GA

AT&T Technologies, Inc. - Berkeley Heights NJ
AT&T Bell Laboratories - Murray Hill NJ

H01B 700

174121A

A relatively small pair size cable (20) comprising at least one insulated conductor (22) is provided with a flame retardant, smoke suppressive non-metallic sheath system (30). The sheath system has a relatively low thermal conductivity and provides a predetermined delay prior to the thermal decomposition of the conductor insulation. It includes an inner layer (31) of an inorganic cellular material which has a relatively low air permeability and two tapes (41, 42) which are wrapped helically about the inner layer with overlapped sealed seams. Each tape comprises a flame retardant thermosetting material. In an alternative embodiment, the heat absorptivity of the sheath system is increased substantially to facilitate the sealing of the seams as the cable is moved along a manufacturing line. This may be accomplished by using an inorganic cellular material which has a relatively high absorptivity or by facing the inner layer or one of the tapes with a material which is heat absorptive.

42848423, Aug 18, 1981

Oct 31, 1979

6/089788

Candido J. Arroyo - Lilburn GA
Nicholas J. Cogelia - Duluth GA
Ralph J. Darsey - Lawrenceville GA

Bell Telephone Laboratories, Inc. - Murray Hill NJ
Western Electric Company, Inc. - New York NY

H01B 734

174107

A cable (20) specially suited for use in building plenums because of its low flame spread and smoke evolution includes a multiconductor core (22) which is enclosed in a sheath comprising an inorganic, cellular core wrap (31), a corrugated metallic barrier (40) and dual layers (51) and (52) of a polyimide tape which are wrapped helically about the barrier in a manner that avoids a compression of the core wrap. The sheath is effective to resist heat transfer inwardly toward the core by conduction while the metallic barrier reflects radiant heat. Advantageously, the sheath containerizes the core without unduly compressing it and thereby allows the intumescence of conductor insulation during a fire to form char which is effective to suppress the evolution of smoke and the propagation of flame.