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:
Oct. 06, 1987
Filed:
Oct. 24, 1985
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An electrode structure disposed in a vacuum switch generally comprises a pair of relatively separable electrodes and a pair of contacts provided on the opposing surfaces of the electrodes and surface areas of the contacts are selected to be smaller than the surface areas of the electrodes. The vapor pressure P.sub.0 and specific resistance .rho..sub.0 of the electrode material and the vapor pressure P.sub.1 and specific resistance .rho..sub.1 of the contact material are held in a relation ##EQU1## and values representing specific heat, heat of fusion and heat of evaporation of the contact material are 100.+-.20% of those of the electrode material except a portion on which the contact material is provided.