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:
May. 12, 2020
Filed:
Mar. 16, 2017
Meidensha Corporation, Tokyo, JP;
Daizo Takahashi, Numazu, JP;
Michihiro Hatanaka, San Jose, CA (US);
MEIDENSHA CORPORATION, Tokyo, JP;
Abstract
An emitter () and a target () are arranged so as to face each other in a vacuum chamber (), and a guard electrode () is provided at an outer circumferential side of an electron generating portion () of the emitter (). The emitter () is supported movably in both end directions of the vacuum chamber () by the emitter supporting unit () having a movable body (). The emitter supporting unit () is operated by an operating unit () connected to the emitter supporting unit (). By operating the emitter supporting unit () by the operating unit (), a distance between the electron generating portion () of the emitter () and the target () is changed, and a position of the emitter () is fixed at an arbitrary distance, then field emission is performed with the position of the emitter () fixed.