H - Electricity – 05 – B
Patent
H - Electricity
05
B
327/1.7
H05B 6/68 (2006.01)
Patent
CA 1273404
ABSTRACT OF THE DISCLOSURE A microwave oven comprises a heating chamber in which to put food to be heated, a high frequency heating circuit for supplying high frequency energy to the heating chamber, two thermal heaters each provided in the upper and lower areas of the heating chamber, a switching circuit for selecting the high frequency heating circuit or the thermal heaters, a first switching circuit for permitting intermittent power supply to the high frequency heating circuit when the high frequency heating circuit is selected by the switching circuit, a second switching circuit connected in parallel with the first switching circuit so as to provide a bypass of the first switching circuit when closed, a first contact mounted in the first switching circuit to permit intermittent power supply to one of the two thermal heaters in the heating chamber, and a second contact mounted in the second switching circuit to provide a bypass of the first contact.
529534
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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