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:
Dec. 23, 1986
Filed:
Oct. 18, 1984
Kouichi Inagaki, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A pre-assembled vacuum switch tube having a clearance between a stationary electrode rod and end plate is firstly prepared by forming an enlarged diameter part in the stationary electrode rod at a position where the rod extends from the end plate to the outside of the vacuum envelope and by arranging at least one piece of plate-like brazing material having a flat surface. The pre-assembled vacuum switch tube is put into a vacuum furnace; the interior of the vacuum switch tube is evacuated through the clearance; temperature in the furnace is elevated to melt the brazing material thereby causing the descending of the enlarged diameter part due to the dead weight of the stationary electrode rod and the vacuum switch tube is sealed by bonding of the end plate and the rod. Alternatively, the clearance is formed in such a manner that a supporting member having a through hole into which the enlarged diameter part of the stationary electrode rod is inserted is placed on the end plate and at least one piece of plate-like brazing material is arranged between the supporting member and the enlarged diameter part of the stationary electrode rod.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile