Electric heating – Metal heating – Of cylinders
Patent
1984-04-19
1985-09-17
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1055B, 200 50C, 126197, H05B 668
Patent
active
045422699
ABSTRACT:
A switching assembly of a heating appliance, for example, a microwave oven, wherein when the heating button is operated (depressed) with the door securely closed, the heating lever causes a projection to be engaged with a hook in the tip of the latch head and simultaneously causes the actuation of the heating switch. Thus the heating switch commonly functions as a heating switch and as a safety switch. By using such a mechanism, the heating switch which activates the heating operation commonly functions as a safety switch that activates itself when the door is securely closed. When the heating button is operated, a rotatable heating lever activates the heating switch, and simultaneously securely engages the latch heads with the front panel of the microwave oven. As a result, a switching assembly incorporating a highly reliable safety switch which can be securely locked by a simple mechanism is provided for a heating appliance.
REFERENCES:
patent: 4006121 (1977-02-01), Isono
patent: 4321445 (1982-03-01), Kristof et al.
patent: 4341409 (1982-07-01), Sakoda
patent: 4450335 (1984-05-01), Shimizu et al.
patent: 4461940 (1984-07-01), Ishimura
Leung Philip H.
Sharp Kabushiki Kaisha
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