Microwave heating apparatus

Details Microwave heating apparatus Microwave heating apparatus

1986-12-22

1987-11-24

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

315 3951, 315 85, 315 3971, 313106, H05B 664

Patent

active

047091290

ABSTRACT:
A microwave power source for a microwave oven in which a microwave magnetron is supplied simultaneously with filament heater power and with anode voltage through an inductive reactance power supply and has end shields with peripheral depressions to suppress end shield secondary emission oscillations during warm-up of the filament which can rapidly collapse to produce rapid shutoff of anode current and, consequently, undesirably high voltage spikes across the magnetron.

REFERENCES:
patent: 2163157 (1939-06-01), Samuel
patent: 2487078 (1949-11-01), Sloan
patent: 2939037 (1960-05-01), Jepsen
patent: 3234424 (1966-02-01), Henry-Bezy et al.
patent: 3315121 (1967-04-01), Staats
patent: 3377562 (1968-04-01), Staats
patent: 3396342 (1968-08-01), Feinberg
patent: 3609581 (1971-09-01), McDowell
patent: 3794879 (1974-02-01), Edwards
patent: 3988636 (1976-10-01), Sato et al.
patent: 4223246 (1980-09-01), Osepchuk
Van Nostrand's Scientific Encyclopedia, Fifth Edition 1976, Van Nostrand Reinhold Co. N.Y., pp. 1540-1541.

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