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. 12, 1978
Filed:
May. 27, 1977
Tsutomu Okutomi, Kawasaki, JP;
Hisashi Yoshino, Yokohama, JP;
Seishi Chiba, Yokohama, JP;
Tadahito Tsutsumi, Fujisawa, JP;
Kouichi Tejima, Tokyo, JP;
Tokyo Shibaura Electric Co., Ltd., Kanagawa, JP;
Abstract
A vacuum circuit breaker comprising an evacuated envelope and a pair of movable conductive rods within the envelope having points of contact equipped with contact members, wherein the conductive rods slide into and out of engaging contact, the improvement comprising at least one of said contacts having circuit making and breaking contact members formed of an alloy consisting essentially of 9.4 wt% to 15 wt% Al, 4.5 wt% to 20 wt% Ni, 0.1 wt% to 10 wt% of at least one metal (Me) selected from the group consisting of bismuth, tellurium, selenium, antimony and magnesium with copper as the balance of the alloy, wherein said alloy contains an .alpha. copper phase (Cu(.alpha.)) containing nickel and a .gamma. copper phase (Cu(.gamma.)) containing nickel substantially dispersed throughout said alloy.