Pulsing probe for microwave oven

Details Pulsing probe for microwave oven Pulsing probe for microwave oven

1978-05-19

1980-09-02

Envall, Jr., Roy N.

Electric heating

Metal heating

Of cylinders

219 1055E, 219 1055R, 219494, 219497, 340588, 126 19R, 323 24, H05B 906

Patent

active

042208408

ABSTRACT:
A microwave oven cooking control system is provided with a comestible probe for temperature sampling. The comestible probe is only intermittently energized so that self-heating is avoided. Energization of the probe is under the control of a timing mechanism, which concurrently produces a voltage signal that rapidly increments in steps corresponding to possible internal temperatures of the comestible. The voltage signal is compared against a reference voltage level, which in turn is governed by the internal temperature of the comestible as sensed by the probe. The comparison results are used to deactuate energization of the probe and to control the microwave energy transmitted to the comestible by the microwave oven magnetron. A threshold a.c. current detector is also connected to said magnetron control to deactuate operation of the magnetron when a low amplitude a.c. power signal is received.

REFERENCES:
patent: 3300622 (1967-01-01), Swain
patent: 3789190 (1974-01-01), Orosy et al.
patent: 3859644 (1975-01-01), Main
patent: 3909598 (1975-09-01), Collins et al.
patent: 3959692 (1976-05-01), Wetzel
patent: 3988577 (1976-10-01), Leitner et al.
patent: 3990000 (1976-11-01), Digneffe
patent: 4011499 (1977-03-01), Betsill et al.
patent: 4066867 (1978-01-01), Bechtel
patent: 4093841 (1978-06-01), Dills

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