Microwave heating device with constant temperature control of th

Details Microwave heating device with constant temperature control of th Microwave heating device with constant temperature control of th

1983-05-10

1985-05-14

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055R, 315 3951, 331 86, H05B 668

Patent

active

045174300

ABSTRACT:
A heating device for use in laboratories and the like comprising an oven housing having a magnetron tube, power control circuitry for the magnetron tube, a timer for determining an amount of pulse power for the magnetron tube, a settable heating time switch with display, a settable venting time switch and display, and magnetron tube resistance heating structure directly, physically attached thereto with thermostatic control therefore for accurately, and by a predetermined amount, heating the magnetron tube prior to operation of the overall heating device. Because the temperature of the magnetron tube is very accurately maintained all of the changeable operating controls for the magnetron respond predictably and with a high degree of accuracy, and therefore when the heating device is used in laboratory applications for heating and drying a plurality of samples individually, each sample can be predeterminedly heated and dryed in a predicable manner like the previous samples. By using percentage of power switches and circuitry together with a variable pulse power control, the overall heating can be accurately controlled and predicted for small samples, medium size samples, and very large samples.

REFERENCES:
patent: 3829649 (1974-08-01), Igarashi
patent: 4017702 (1977-04-01), Harmon et al.
patent: 4121149 (1978-10-01), Seltzer
patent: 4217477 (1980-08-01), Matsubara et al.
patent: 4223195 (1980-09-01), Bechtel
patent: 4228809 (1980-10-01), Paglione
patent: 4233478 (1980-11-01), Stahl et al.
patent: 4236055 (1980-11-01), Kaminaka
patent: 4268779 (1981-05-01), Eichelberger et al.
patent: 4314197 (1982-02-01), Sandler et al.
patent: 4323861 (1982-04-01), Sandler et al.

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