Safety apparatus for microwave cooking devices

Details Safety apparatus for microwave cooking devices Safety apparatus for microwave cooking devices

1980-02-22

1982-04-06

Reynolds, B. A.

Electric heating

Metal heating

Of cylinders

126197, 200 50A, 200 50C, 200 6162, 3071418, 361115, 361192, H05B 668, H01H 922

Patent

active

043237479

ABSTRACT:
A safety arrangement for microwave ovens or similar cooking devices, in which a circuit breaking element and a main switch, which is arranged to be open in conjunction with an unlocking operation of a lock for a door, are interposed in a load circuit connecting between an electric source of power and a load. A first door switch is arranged to be closed when the door is opened and is connected to the load circuit in parallel with the load. An auxiliary switch becomes opened upon unlocking of the lock, and is connected in the load circuit on the load side of the first door switch. A second door switch becomes opened with a delayed time interval after closing of the first door switch, by opening of the door, and is connected to the load circuit on the electrical power source side of the first door switch. The door switches become operated by a door arm extending from the door.

REFERENCES:
patent: 3504144 (1970-03-01), Horner
patent: 3639717 (1972-02-01), Mochizuki
patent: 3699300 (1972-10-01), Buerki
patent: 4054769 (1977-10-01), Anderson et al.
patent: 4117294 (1978-09-01), Appelquist et al.
patent: 4177370 (1979-12-01), Otani

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