Core magnetron and method of manufacturing permanent magnets the

Details Core magnetron and method of manufacturing permanent magnets the Core magnetron and method of manufacturing permanent magnets the

1976-07-20

1978-08-08

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Distributed parameter resonator-type magnetron

315 3951, 315 3975, 148120, 148121, H01J 2550

Patent

active

041059131

ABSTRACT:
A core type magnetron comprising a vacuum envelope which includes an open ended magnetic anode cylindrical member and magnetic upper and lower end plates for closing the opposite end openings of the cylindrical member. Internal to the vacuum envelope, a plurality of anode vanes are provided which extend in a radial direction from the approximate middle of the inner wall of the cylindrical member toward the center of the envelope. A pair of permanent magnets provided internal to the envelope, each extending from opposite end plates toward the anode vanes. By this arrangement, an operating space is defined by the opposing surfaces of the pair of the magnets and the anode vanes, such that a magnetic flux is applied to said operating space. A cathode is provided within the operating space. The magnets employed are characterized as being low in the emission of gases during operation of the magnetron, since they are manufactured by a process which includes melting designated source materials mixed with a small amount of silicon in a vacuum, casting the melt in a vacuum, followed by forging.

REFERENCES:
patent: 2446826 (1948-08-01), McArthur
patent: 2468576 (1949-04-01), Teare
patent: 3376466 (1968-04-01), Gerard
patent: 3867211 (1975-02-01), Easton
patent: 3868278 (1975-02-01), Foster et al.
patent: 3954519 (1976-03-01), Inoue
patent: 3977919 (1976-08-01), Foster et al.
patent: 3982972 (1976-09-01), Iwata et al.
patent: 3989556 (1976-11-01), Iwata et al.

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