Electrical heating apparatus with overheating protection

Details Electrical heating apparatus with overheating protection Electrical heating apparatus with overheating protection

1980-09-05

1982-02-09

Reynolds, B. A.

Electric heating

Heating devices

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

219508, 219509, 219510, 219212, 219504, 307252B, H05B 102

Patent

active

043151418

ABSTRACT:
An electrical heating apparatus, and particularly a bedcover preferably in the form of a blanket, protected against an overheating condition and in which electrical current flow through a heating element is controlled by a pair of gate controlled bidirectional semiconductor switches electrically connected to one another in series and in front-to-front orientation. The gates of the semiconductor switches are connected through a temperature sensitive capacitor which triggers the semiconductor switches from a conductive to a nonconductive state in response to the sensing of an overheating condition.

REFERENCES:
patent: 3222497 (1965-12-01), Gordon, Jr.
patent: 3356825 (1967-12-01), Mills et al.
patent: 3683151 (1972-08-01), Mills et al.
patent: 4198562 (1980-04-01), Mills et al.

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