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. 08, 1986
Filed:
Oct. 05, 1983
Brian F Cooper, Chelmsford, GB;
David H Cottey, East Hanningfield, GB;
English Electric Valve Company, Chelmsford, GB;
Abstract
A millimeter coupled cavity travelling wave tube has its slow wave structures formed by a hobbing process. In a preferred construction, each slow wave structure is made of two individual halves each extending for the length of the structure. Each half contains one half of each cavity and one half of each beam hole and all of the portions of cavity and portions of beam hole in each half are formed in one hobbing operating. Coupling holes between cavities are formed where required by a process (e.g. spark erosion) separate from hobbing and if ferrules or drift tubes are required to extend out of the cavity separating walls in the finished tube, the beam coupling holes are made oversized and individual ferrules are brazed into position. The two halves of the slow wave structure are united by furnace brazing.