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:
Nov. 19, 1985
Filed:
Sep. 07, 1984
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Meidensha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
2001 / ; 200262 ; 200265 ; 200266 ;
Abstract
A contact of a vacuum interrupter and a manufacturing process therefor are disclosed. The contact can greatly reduce the chopping current of the interrupter, can greatly increase the dielectric strength thereof and can improve the large- and small-current interrupting capabilities thereof. The contact is made of a material containing 29 to 74 weight % copper, 15 to 60 weight % chromium, 10 to 35 weight % iron, 0.5 to 15 weight % carbon and 0.5 to 15 weight % silicon. The process contains the steps of producing a porous matrix by sintering a mixture of all of the elements except copper under a nonoxidizing atmosphere, impregnating the matrix with copper and machining the resultant material.