Optically sensitive control circuit for a food browning device
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United States of America Patent
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-
Jan 13, 1981
Grant Date -
N/A
app pub date -
Sep 14, 1979
filing date -
Sep 14, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control circuit is disclosed suitable for use with a toaster or other food browning device which utilizes a radiant energy source to brown food. A light sensitive variable resistor, or photocell, is optically coupled to light reflected from the food being browned in the device. A voltage generated by a voltage divider including the light sensitive resistor therein is compared with a preselectable voltage generated by a second voltage divider to determine whether the heat source should be turned on or off. Suitable solid state control circuitry is provided to ensure that a start-up delay is provided at the beginning of each browning cycle and to reset the circuit for future operation when the desired browning of the food is achieved.
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