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1.发明授权
公开(公告)号：US3562487A
公开(公告)日：1971-02-09
申请号：US3562487D
申请日：1966-06-08
Applicant: EXXON RESEARCH ENGINEERING CO
Inventor： NELSON JEROME W , GAHM WALLACE LEROY
CPC classification number: B23K9/0732
Abstract: Apparatus for generating a substantially constant current while allowing a predetermined amount of variation in a gated voltage suitable for use in electric arc welding employed in automatic pipe welding operations.
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