Sensor controlled cooking apparatus

Details Sensor controlled cooking apparatus Sensor controlled cooking apparatus

1981-07-21

1984-04-10

Paschall, M. H.

Electric heating

Heating devices

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

219501, 219505, 324105, H05B 102

Patent

active

044423446

ABSTRACT:
A microwave oven includes a gas sensor for detecting a cooking condition. The resistance value of the gas sensor varies in response to the concentration of the gas generated from the foodstuff being cooked in the microwave oven. A resistance-to-frequency converter including an astable multivibrator is provided for converting the variation of the resistance value of the gas sensor into a frequency signal. A cooking constant setting circuit is provided for developing a signal of a reference frequency in response to a menu to be conducted. The frequency signal, indicative of the resistance value of the gas sensor, obtained by the resistance-to-frequency converter is compared with the reference frequency to terminate the cooking operation when the frequency signal reaches the reference frequency.

REFERENCES:
patent: 4097723 (1978-06-01), Leitner et al.
patent: 4311895 (1982-01-01), Tanabe
patent: 4320285 (1982-03-01), Koether

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