Electrical circuit protection devices comprising PTC conductive

Details Electrical circuit protection devices comprising PTC conductive Electrical circuit protection devices comprising PTC conductive

1995-08-11

1997-11-25

Walberg, Teresa J.

Electrical resistors

Resistance value responsive to a condition

Current and/or voltage

338 22BD, H01C 710

Patent

active

056916892

ABSTRACT:
Electrical circuit protection devices containing PTC elements comprised of conductive polymers which exhibit PTC behavior and are used to protect a load in an electrical circuit, in which the PTC conductive polymers are based on highly crystalline and highly ordered liquid crystal polymers and particulate conductive fillers dispersed therein, which are cross-linked by radiation. These circuit protection devices operate as automatically resettable current limiters and are particularly useful for protecting motors, solenoids, telephone lines and batteries, and for enhancing circuit interruption capability when used in conjunction with breakers and contactors. The liquid crystal polymers include aromatic polyesters, e.g., poly(p-phenylene terephthalate) and poly(p-hydroxybenzoate); aromatic copolyesters, e.g., poly(p-hydroxybenzoate-co-2,6-hydroxynaphthoate), poly(deca-methyleneterephthaloyl di-p-hydroxybenzoate, and poly(ethylene terephthalate-co-oxybenzoate); aromatic copolyester amides, e.g., poly(2,6-hydroxy-naphoate-phenoxyaminoterephthoate); aromatic polyamides, e.g., poly(p-phenylene terephthalamide), Kevlar, poly(p-benzamide), poly(2-chloro-1,4-phenylene terephthalamide), poly(p,p'-biphenylamide), and poly(2,6-napthalamide); aromaticpolyazomethines, e.g., poly (nitro-2-methyl-1,4-phenylenenitriloethylidine-1,4-phenylenethylidine), poly(nitrilo-2-methyl-1,4-phenylenenitrilomethylidine-1,4-phenylenemethyli dine), and poly(nitrolo-2-chloro-1,4-phenylenenitrilomethylidine-1,4-phenylenemethyli dine); and, blends thereof. The particulate conductive fillers include carbon black, carbon fibers, graphite, and metal flakes.

REFERENCES:
patent: 3225320 (1965-12-01), Solomons
patent: 3243753 (1966-03-01), Kohler
patent: 4545926 (1985-10-01), Fouts, Jr. et al.
patent: 4647894 (1987-03-01), Ratell
patent: 4685025 (1987-08-01), Carlomagno
patent: 4724417 (1988-02-01), Au et al.
patent: 4772422 (1988-09-01), Hijikata et al.
patent: 4774024 (1988-09-01), Deep et al.
patent: 4775778 (1988-10-01), van Kouynenberg et al.
patent: 4857880 (1989-08-01), Au et al.
patent: 4910389 (1990-03-01), Sherman et al.
patent: 4966729 (1990-10-01), Carmona et al.
patent: 5049850 (1991-09-01), Evans
patent: 5195013 (1993-03-01), Jacobs et al.
patent: 5316973 (1994-05-01), Wang et al.
patent: 5374379 (1994-12-01), Tsubokawa et al.
patent: 5428100 (1995-06-01), Asai et al.
patent: 5529741 (1996-06-01), Rubin et al.

Affiliated with

Also associated with

Rating

Electrical circuit protection devices comprising PTC conductive does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrical circuit protection devices comprising PTC conductive , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical circuit protection devices comprising PTC conductive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2110390