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. 23, 1978
Filed:
Jun. 24, 1975
Applicant:
Inventors:
Hideo Arakawa, Hitachi, JA;
Keiichi Kuniya, Hitachi, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
2001 / ; 200265 ; 200266 ;
Abstract
In a vacuum-type circuit breaker, a contact is composed of a principal component material of Cu alloy, to which a Pb-Bi alloy, containing either 18 to 45 weight % Bi or 65 to 80 weight % Bi and at least one of either cobalt or iron are added. Said contact is provided with a structure in which at least one of either cobalt phase or iron phase is dispersed in a copper matrix and Pb-Bi alloy phase is dispersed in the grain boundary, and has extremely low chopping current.
Arakawa, Hideo. (1978). Vacuum-type circuit breaker (U.S. Patent No. 4091248). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4091248
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile