Heated transparency with malfunction detection means

Details Heated transparency with malfunction detection means Heated transparency with malfunction detection means

1988-07-05

1990-01-16

Paschall, M. H.

Electric heating

Heating devices

Combined with diverse-type art device

219501, 219497, 219543, H05B 102

Patent

active

048945145

ABSTRACT:
In a system for electrically heating a transparency, a malfunction in the heating circuit is detected by a Hall effect sensor that detects current changes in a lead to the heating circuit. The sensor is not directly connected to the heating circuit and detects the entire heating current at a location close to the transparency.

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patent: 4668270 (1987-05-01), Ramus
patent: 4728768 (1988-03-01), Cueman

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