The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 1992
Filed:
Dec. 07, 1989
Applicant:
Inventors:
Toshio Ogura, Mobara, JP;
Masumi Kuga, Mutsusawamachi, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Nisshin Electronics Co., Ltd., Chiba, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315 3969 ; 315 3975 ;
Abstract
There is disclosed a magnetron whose oscillation frequency can be easily adjusted. The magnetron comprises a cylindrical anode, several anode vanes radially arranged around the axis of the anode, and two strap rings of the same structure. Alternate ones of the anode vanes are connected together by one of the strap rings. The remaining anode rings are connected together by the other strap ring. The two strap rings are displaced circumferentially relative to each other by a given angle centering around the axis of the anode.