Title:
【発明の名称】マグネトロン
Document Type and Number:
Japanese Patent JP2905748
Kind Code:
B2
Abstract:
An improved magnetron which is capable of elongating the life span of the magnetron, reducing the fabrication cost, and enhancing the performance of the system without using a filament in the conventional art, which includes a center lead, an upper end shield engaged to an upper portion of the center lead for preventing thermal electrons from being escaped, a plate-type primary cathode arranged below the upper end shield and fixed to one side of the supporting layer surrounding the center lead, a cylindrical secondary cathode having an elongating slit formed in an outer circumferential surface thereof, through which slit a part of the plate-type primary cathode is outwardly extended beyond the outer circumferential surface of the cylindrical secondary cathode, and a lower end shield engaged to the lower portion of the secondary cathode.
Inventors:
RII JONNSOO
Application Number:
JP32958996A
Publication Date:
June 14, 1999
Filing Date:
December 10, 1996
Export Citation:
Assignee:
ERU JII DENSHI KK
International Classes:
H01J23/04; H01J23/05; H01J25/50; (IPC1-7): H01J23/04
Attorney, Agent or Firm:
Takashi Ishida (3 others)