Power supply cut-off apparatus in a microwave oven

Details Power supply cut-off apparatus in a microwave oven Power supply cut-off apparatus in a microwave oven

1997-06-12

1998-12-01

Leung, Philip H.

Electric heating

Microwave heating

With control system

219702, 219716, 219756, 219509, 126197, H05B 668

Patent

active

058442146

ABSTRACT:
A microwave oven includes an electric power supply shut-off mechanism for cutting off the supply of electric power when the housing is disassembled for repair while an electric power cord remains plugged into an electric outlet. A sensor in the form of a light sensitive semiconductor and/or a piezoelectric crystal senses when panels of the oven housing are removed and thereupon causes a controller to actuate a solenoid which deactivates a safety switch for cutting off the supply of electric current.

REFERENCES:
patent: 4277659 (1981-07-01), DeRemer
patent: 4394565 (1983-07-01), Dills
patent: 4712154 (1987-12-01), Madsen

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