Electrical heaters

Details Electrical heaters Electrical heaters

1986-12-05

1989-04-18

Paschall, M. H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219504, 219212, 219509, 361 56, 361 91, H05B 102

Patent

active

048229830

ABSTRACT:
Apparatus for automatically disconnecting a conductive polymer heater if an arcing fault occurs. A sensor conductor is incorporated into the heater, so that if an arcing fault occurs, the current through the sensor conductor increases and triggers a safety circuit to disconnect the heater. The sensor conductor is preferably insulated by an organic polymer which pyrolyses if an arcing fault occurs and thus permits current to flow between the sensor conductor and an electrode of the heater.

REFERENCES:
patent: 2581212 (1952-01-01), Spooner et al.
patent: 2846559 (1958-08-01), Rosenberg
patent: 3375477 (1968-03-01), Kawazoe
patent: 3628093 (1971-12-01), Crowley
patent: 4436986 (1984-03-01), Carlson
patent: 4439801 (1984-03-01), Fajt
patent: 4575620 (1986-03-01), Ishii et al.
patent: 4591700 (1986-05-01), Sopory
patent: 4607154 (1986-08-01), Mills

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