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:
Jul. 28, 1981
Filed:
Sep. 27, 1979
John E Baker, London, GB;
E M I -Varian Limited, Hayes, GB;
Abstract
A spin tuned magnetron (FIG. 2) includes a spinner 3 which interacts with a magnetron cavity to modulate its frequency of oscillation. The spinner runs in bearings 8, 9 around a shaft 7. The lives of the bearings are a controlling factor in the life of the magnetron. The outer races OR are fixed in position relative to each other and to the spinner by spacers, 13, 14 and a spring 15 arranged between an abutment 11 and a circlip 12 on the spinner. The inner races are arranged to be moveable relative to each other and to the shaft by virtue of spacers 10 and 17, a spring 16 between the inner races, and a further spring 18. A pole-piece nose 4 is arranged to be screwed down on the shaft to compress the springs 16 and 18 to provide a desired amount of axial float on the spinner. By setting the axial float the bearing load can be shared as desired and thus increase the lives of the bearings.