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. 31, 2020
Filed:
Mar. 16, 2017
Meidensha Corporation, Tokyo, JP;
MEIDENSHA CORPORATION, Tokyo, JP;
Abstract
Emitter () and target () are arranged so as to face each other in vacuum chamber (), and guard electrode () is provided at outer circumferential side of electron generating portion () of emitter (). Guard electrode () is supported movably in directions of both ends of vacuum chamber () by guard electrode supporting unit (). To perform regeneration process of guard electrode (), guard electrode () is moved to opening () side (to separate position) by operating guard electrode supporting unit (), and a state in which field emission of electron generating portion () is suppressed is set, then by applying voltage across guard electrode (), discharge is repeated. After performing regeneration process, by operating guard electrode supporting unit () again, guard electrode () is moved to opening () side (to emitter position), and a state in which field emission of electron generating portion () is possible is set.