Combination thermal and mechanical safety switch for microwave h

Details Combination thermal and mechanical safety switch for microwave h Combination thermal and mechanical safety switch for microwave h

1985-12-19

1987-05-05

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055B, 126197, H05B 664

Patent

active

046635084

ABSTRACT:
In a microwave heating oven, a safety switch 301 is disposed in an external position relative to a heating chamber 100. A displacement rod 302, which is made of polyprophylene or the like low dielectric constant plastic substance, is disposed through and across the heating chamber 100. Displacement rod 302 serves as a thermal switch, so that at an abnormally high temperature displacement rod 302 melts down, thereby opening the safety switch 301 and disengaging the microwave generator.

REFERENCES:
patent: 3715552 (1973-02-01), Umezu et al.
patent: 3766437 (1973-10-01), Fritts
patent: 4461940 (1984-07-01), Ishimura

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