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公开(公告)号：US2981815A
公开(公告)日：1961-04-25
申请号：US70175657
申请日：1957-12-10
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： LEEDS WINTHROP M , JOHNSON ALVA A
IPC: H01H1/16 , H01H33/02 , H01H33/873 , H01H33/91
CPC classification number: H01H33/02 , H01H1/16 , H01H33/91 , Y10S174/10
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