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:
Jul. 22, 1997
Filed:
Oct. 31, 1995
Applicant:
Inventors:
Shigeru Shimogama, Kawanishi, JP;
Toshinori Hongu, Nishinomiya, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
21913021 ; 21912434 ; 901 42 ;
Abstract
An arc welding system includes a welding power source unit for producing welding power for fusing welding wire to weld a workpiece. An internal resistor is incorporated in the welding power source unit. A relay is inserted between the internal resistor and the welding power source unit for switching a connection therebetween according to the operating condition of the arc welding system. The relay connects the internal resistor and the welding power source unit only while the arc welding system is performing a welding operation.