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. 15, 1985
Filed:
Dec. 09, 1982
Applicant:
Inventor:
Robert F Keller, Lancaster, PA (US);
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; H01K / ;
U.S. Cl.
CPC ...
313341 ; 315 3951 ; 315337 ;
Abstract
A magnetron includes an evacuated envelope having therein a cathode assembly. An anode electrode surrounds the cathode assembly. The cathode assembly is formed of a helically wound filament having a quadrilateral cross-section. One of the surfaces of the quadrilateral cross-section filament is wider than the others. The wider surface of the filament faces the anode electrode. The quadrilateral cross-section thereby increasing the sag resistance of the filament.