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. 03, 1985
Filed:
Dec. 23, 1983
Applicant:
Inventors:
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Keiyo Engineering Co., Ltd., Narashino, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
21912434 ; 21912512 ;
Abstract
In welding effected by weaving an electrode, welding current or voltage is applied to a frequency analyzer, for deriving a frequency component having the same period as a weaving period and a doubled frequency component having a period which is half the weaving frequency. The center of weaving motion is corrected in relation to the two frequency components to thereby effect tracer control for the electrode.