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. 09, 1978
Filed:
Sep. 15, 1975
Applicant:
Inventors:
Masatoshi Kubo, Tokyo, JA;
Toshito Hara, Sagamihara, JA;
Yuji Hayashi, Susaka, JA;
Makoto Kassai, Yokohama, JA;
Norio Matsumoto, Kawasaki, JA;
Tsuneyoshi Nishi, Yokohama, JA;
Koushichi Suzuki, Yokohama, JA;
Michiko Kodama, Yokohama, JA;
Kaduwo Sintani, Tokyo, JA;
Assignee:
Fujitsu Limited, Kawasaki, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ; H01H / ;
U.S. Cl.
CPC ...
427123 ; 427 89 ; 427124 ; 427125 ; 4273 / ; 4273 / ; 4273 / ; 427405 ; 427406 ; 204 / ; 204 / ; 204 / ; 200268 ;
Abstract
Electrical contacts are produced by processes comprising (1) forming on a metallic body a first layer of low melting metal(s) and (2) forming on the first layer a second layer of high melting metal(s). The thus produced contacts possess prolonged life, approximately 10 times that of conventional contacts when they are operated as working contact.