Electrical heating apparatus with overheating protection
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United States of America Patent
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-
Feb 9, 1982
Grant Date -
N/A
app pub date -
Sep 5, 1980
filing date -
Sep 5, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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