Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Distributed parameter resonator-type magnetron
Patent
1996-02-13
1999-01-19
Lee, Benny T.
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Distributed parameter resonator-type magnetron
313341, 313344, H01J 2550, H01J 2305
Patent
active
058617167
ABSTRACT:
A magnetron includes a cathode mount having a directly heated helical cathode filament for emitting thermoelectrons, an upper end shield and a lower end shield disposed so as to support the filament at upper and lower ends thereof, and center and side leads holding the upper and lower end shields respectively. The lower end shield is formed with a recess for housing the lower end of the directly heated helical cathode filament in the upper surface thereof, at least a portion of the inner wall of the recess is sloped, and a groove is formed at the peripheral edge of the bottom of the recess.
REFERENCES:
patent: 4705989 (1987-11-01), Takada et al.
Hitachi , Ltd.
Hitachi Electronic Devices Co. Ltd.
Lee Benny T.
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