Integral sensor controller for an electrical heater
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United States of America Patent
Stats
-
Apr 5, 1988
Grant Date -
N/A
app pub date -
Sep 10, 1986
filing date -
Sep 10, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Integral sensor controller for an electrical resistance heater, where the heater is constructed from materials such as nickel, balco, platinum, alumel, or like materials which have an appreciable, positive temperature coefficient of resistivity. The resistance versus temperature characteristic of the heater acts as the temperature sensor. A low level D.C. current provides a sensor voltage which is compared to a set point voltage for switching the heater power through a transistor. The relationship of the sensor voltage to the set point voltage is compared by a comparator which is subsequently used to toggle flip flops for switching of the heater power. Circuitry is provided for protection against heater short circuits.
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Family
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- Non-US Classification not provided for expired patents
Cited Art Landscape
Patent Citation Ranking
- Citation Ranking not provided for expired patents
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