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:
Jan. 10, 1989
Filed:
Sep. 04, 1987
Applicant:
Inventor:
Mamoru Tsuzurahara, Mobara, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315-513 ; 315 39 ; 315 40 ;
Abstract
A filter for preventing an electromagnetic wave from leaking from a cathode line of a magnetron comprises an inductance element connected in series to the cathode line and a reactance element of a coaxial structure including a portion of the cathode line as a center conductor, a surrounding dielectric material and a surrounding metal conductor. A cup-shaped conductor is arranged around the reactance element to form a parallel inductance component to the cathode line.