Electrically operated control device and system for a microwave

Details Electrically operated control device and system for a microwave Electrically operated control device and system for a microwave

1987-07-09

1988-07-05

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219492, 219506, 99325, 340706, 200 37A, H05B 668

Patent

active

047556463

ABSTRACT:
An electrically operated control device and system for a microwave oven are provided, the device comprising a microprocessor for operating the power unit of the oven at various selected power levels thereof, a first selector unit electrically interconnnected to the microprocessor for selecting a desired power level that the microprocessor is to operate the power unit, and a second selector unit electrically interconnected to the microprocessor for selecting a desired time period that the microprocessor is to operate the power unit at the desired power level thereof, the first and second selector unit each comprising a rotary switch unit that is electrically interconnected to the microprocessor in such a manner that the respective rotary switch unit always selects the same set sequence of said selection settings for the microprocessor as said respective rotary switch unit is rotated in one direction from a beginning position thereof that selects a first selection of the sequence to an ending position thereof that selects a last selection of the sequence, the beginning position of each rotary switch unit always being the position where that respective rotary switch unit was last set for a previously desired setting of the microprocessor by that respective rotary switch unit even though the previously desired setting was a setting of the sequence other than the first selection thereof.

REFERENCES:
patent: 4343977 (1982-08-01), Koyama
patent: 4430540 (1984-02-01), Scalf
patent: 4568927 (1986-02-01), Fowler
patent: 4625084 (1986-11-01), Fowler
patent: 4697057 (1987-09-01), Fowler

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