Magnetron for microwave oven

Details Magnetron for microwave oven Magnetron for microwave oven

1987-10-06

1989-08-08

Boudreau, Leo H.

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Distributed parameter resonator-type magnetron

315 3951, 315 3975, 313153, H01J 2550

Patent

active

048556459

ABSTRACT:
In a magnetron, anode vanes are radially arranged in an anode cylinder and fixed to the inner surface of the anode cylinder. A cathode is arranged along a tube axis in the anode cylinder. Pole pieces of dish like shape are fixed to openings of the anode cylinder and the anode cylinder is hermetically sealed by cylindrical chambers. Permanent magnet rings are arranged around the cylindrical chambers, respectively, and are magnetically coupled by a yoke. Each of the pole pieces has a flange section, a flat inner disk section and a coupling section extending from the flange section to flat inner disk section. The outer diameter of pole piece is larger than 160% the diameter of an envelope defined by inner ends of the anode vanes. A envelope space contacting the inner ends of the anode vanes has a predetermined magnetic field intensity distribution that is produced by a magnetic flux supplied from the pole pieces and has a difference of not more than 15% along the tube axis.

REFERENCES:
patent: 4338545 (1982-07-01), Koinuma et al.
patent: 4426601 (1984-01-01), Tsuzurahara

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