Cooking appliances

Details Cooking appliances Cooking appliances

1990-01-30

1992-04-21

Reynolds, Bruce A.

Electric heating

Metal heating

Of cylinders

219 1055F, 219 1055C, 219492, 219493, H05B 668, H05B 102

Patent

active

051070880

ABSTRACT:
A microcomputer-based control device for microwave ovens includes a timer defining an operation period of a magnetron and incorporated in the microcomputer, an encoder generating electrical pulses, the number of which is in accordance with an amount of angular displacement of an operation knob, the encoder being independent of the microcomputer, first and second semiconductor switches for starting an operation of the magnetron in response to either any one or a plurality of a pulse train generated by the encoder, the semiconductor switches being incorporated in the microcomputer, and a counter for setting, at the timer, a cooking period in accordance with the numer of pulses of the pulse train generated by the encoder.

REFERENCES:
patent: 4517431 (1985-05-01), Ueda
patent: 4719326 (1988-01-01), Yoo
patent: 4755646 (1988-07-01), Fowler

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