Coaxial cable for plenum applications
AssigneeLucent Technologies Inc.
InventorsLarry Lynn Bleich, Steven John Cassady, John Thomas Chapin, Philip Nelson Gardner
Life of this patent
Estimating the term…
Abstract
A coaxial cable with standard coaxial structure of central conductor, foamed polyethylene dielectric, and outer conductor and having a jacket that provides sufficient flame resistance and smoke generation to allow the cable to be used in plenum spaces. The jacket includes a halogenated polymer with a heat of combustion less than 7000 BTU per pound and including a free-radical scavenger.
Claims18
A shielded coaxial cable which complies with the flame spread and smoke optical density requirements of UL 910 for a Plenum Cable, said coaxial cable consisting essentially of:
- a core member including
- a central conductor;
- and
- a solid dielectric material, said solid dielectric material surrounding the length of said central conductor;
- an outer conductor shield surrounding said dielectric material;
- and
- a jacket comprising a halogenated polymer having a heat of combustion between approximately 2300 and 7000 BTU per pound and including a free radical scavenger for flame retardance.
A shielded coaxial cable which complies with the flame spread and smoke optical density requirements of UL 910 for a Plenum Cable, said coaxial cable consisting essentially of:
- a core member including
- a central conductor;
- and
- a dielectric material;
- said dielectric material comprising foamed polyethylene encapsulating the length of said central conductor;
- an outer conductor shield surrounding said dielectric material;
- and
- a jacket surrounding said outer conductor comprising a halogenated polymer having a heat of combustion between approximately 2300 and 7000 BTU per pound and including a free radical scavenger for flame resistance, said jacket having a thickness from between about 0.017 to 0.025 inches.
A shielded coaxial cable which complies with the flame spread and smoke optical density requirements of UL 910 for a Plenum Cable, said coaxial cable consists essentially of:
- a core member including
- a central conductor;
- and
- a dielectric material comprised of foamed polyethylene encapsulating the length of said central conductor;
- an outer conductor shield of braided copper surrounding said dielectric material;
- and
- a jacket surrounding said outer conductor comprising a halogenated polymer, said halogenated polymer comprising a copolymer of vinylidene fluoride and 20% chlorotrifluoroethylene and a smoke suppressant, said halogenated polymer having a heat of combustion between approximately 2300 and 7000 BTU per pound and including a free radical scavenger for flame retardance, said jacket having a thickness from between about 0.017 to 0.025 inches.
Dependencies are inferred from the claim text.