High frequency heating apparatus

Details High frequency heating apparatus High frequency heating apparatus

1991-01-25

1992-12-15

Reynolds, Bruce A.

Electric heating

Metal heating

Of cylinders

219 1055F, 323207, 323285, 323301, G05F 170, H05B 604

Patent

active

051719487

ABSTRACT:
A high frequency heating apparatus includes a casing, an inverter enclosed in the casing, a magnetron supplied with high frequency voltage from the inverter, and three attachment plugs each connected to one of external power supplies of different output voltages. The attachment plugs are connected to the inverter input side via respective power supply selecting switches. The apparatus further includes three display panels one of which is selectively attached to the apparatus. Each display panel has an indicia indicative of one of the power supply voltages used and two projections selectively turning off the other two power supply selecting switches when attached to the apparatus.

REFERENCES:
patent: 4002875 (1977-01-01), Kiuchi et al.
patent: 4005370 (1977-11-01), Kusunoki et al.
patent: 4415964 (1983-11-01), Scharfe, Jr.
patent: 4430540 (1984-02-01), Scalf
patent: 4533809 (1985-08-01), Eke
patent: 4725948 (1988-02-01), Mierzwinski
patent: 4843202 (1989-06-01), Smith et al.
patent: 4900885 (1990-02-01), Inumada
patent: 4904837 (1990-02-01), Low et al.
patent: 4931609 (1990-06-01), Aoki
patent: 4933830 (1990-06-01), Sato et al.

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