Self-limiting temperature electrical heating cable

Details Self-limiting temperature electrical heating cable Self-limiting temperature electrical heating cable

1976-07-22

1978-09-26

Truhe, J. V.

Electric heating

Heating devices

With heating unit structure

219505, 219528, 219553, 338 22R, 172 52, H05B 356

Patent

active

041173120

ABSTRACT:
An electrical heating cable which limits power output once an established temperature limit is reached. The cable includes a high-resistance element and a temperature-sensitive variable resistance element electrically connected in series between two electrical conductors otherwise insulated from each other by insulating material. The temperature-sensitive resistance undergoes a substantial positive increase in resistivity when the temperature of the cable nears the established temperature limit. The increase in resistivity substantially reduces the heat-generating current flowing in the cable to limit the power output.

REFERENCES:
patent: 2765391 (1956-10-01), Shroyer
patent: 2804532 (1957-08-01), Lacy-Hulbert
patent: 3341690 (1967-09-01), Commins
patent: 3375774 (1968-04-01), Fujimura et al.
patent: 3551644 (1970-12-01), Sano et al.
patent: 3719907 (1955-10-01), Combs
patent: 3748439 (1973-07-01), Ting et al.
patent: 3757086 (1973-09-01), Indoe
patent: 3878501 (1975-04-01), Moorhead et al.
patent: 3959622 (1976-05-01), Bohdanov et al.
patent: 3995141 (1976-11-01), Vieau et al.
patent: 4017715 (1977-04-01), Whitney

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