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. 29, 1998
Filed:
Aug. 23, 1996
Applicant:
Inventors:
Masayuki Furusawa, Saitama, JP;
Hisaji Shinohara, Saitama, JP;
Nobuyuki Odaka, Saitama, JP;
Katsuhiko Taguchi, Saitama, JP;
Yukio Osawa, Saitama, JP;
Kazuro Shibata, Saitama, JP;
Shoichi Ote, Saitama, JP;
Assignee:
Fuji Electric Co., Ltd., Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
200264 ; 200265 ; 200270 ; 420495 ; 428567 ;
Abstract
Interrupting and chopping characteristics of a Cu--Cr contact alloy are improved by rounding Cr particles to be spherical in the alloy. The Cr particles are rounded in the alloy by sintering raw Cr powder particles having an average particle diameter of less than 100 .mu.m at a temperature of 1,100.degree. C. or higher with Cu powder, or by sintering raw Cr powder particles having an average particle diameter of 100 to 150 .mu.m at a temperature of 1,200.degree. C. or higher with Cu powder.