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:
Dec. 26, 1989
Filed:
Apr. 25, 1988
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
21913051 ; 21913021 ;
Abstract
A consumable electrode arc welding machine in which if a short circuit does not lasts beyond a predetermined first time limit, pulse current and base current outputs for the arc are alternated with each other in a basic pulse period. If a short circuit lasts beyond the first time limit, the welding output during the subsequent short circuit period is subjected to constant-current control along a predetermined first trace, and a second time limit begins from the start of arc regeneration. The welding output is controlled to be different from both the pulse current and base current during the second time limit to restore the operation of the welding within the basic pulse period.