Microwave oven having a pre-programmed timing device

Details Microwave oven having a pre-programmed timing device Microwave oven having a pre-programmed timing device

1989-04-10

1990-03-20

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055B, 200 50C, H05B 668, H01H 4300

Patent

active

049103709

ABSTRACT:
A microwave oven has a circuit for controlling the supply of electricity to a generator of microwave energy, the circuit having a main switch and movable contact, the opening of which is controlled by a timer. The control circuit also comprises a by-pass circuit mounted in parallel between two points having a pre-programmed timing device in series with the interrupting switch. A commutating mechanism controlled by a user is adapted to both move circuit switch to its open position and to move the interrupting switch to a closed position in which a timing device operates to allow the supply of electricity to the microwave generator.

REFERENCES:
patent: 3824365 (1974-07-01), Tapper
patent: 4539453 (1985-09-01), Miyazaki et al.
patent: 4556773 (1985-12-01), Yoshiyuki et al.
patent: 4600826 (1986-07-01), Ishimura
patent: 4629845 (1986-12-01), Mahon

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