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:
Mar. 06, 1979
Filed:
Sep. 14, 1977
Applicant:
Inventors:
Alan B Cutting, Maidenhead, GB;
Donald E Tyzack, Gerrards Cross, GB;
Assignee:
E M I-Varian Limited, Hayes, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315 3961 ; 315 3955 ;
Abstract
In a spin-tuned magnetron a plurality of anode vanes disposed in an annulus form resonant cavities and a spinner, carrying a plurality of apertures rotates coaxially with the annulus to pass through the cavities and vary the resonant frequencies. This expedient gives a frequency variation which is predictable. This invention provides a less predictable frequency variation by modifying the shape of at least one of the vanes and at least one of the apertures. The aperture is in one example modified by cutting a slot between one aperture and the edge of the spinner.