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:
Mar. 12, 1991
Filed:
Jul. 27, 1990
Teruzo Yamaguchi, Tokyo, JP;
Tatsuo Morita, Tokyo, JP;
Obara Corporation, Tokyo, JP;
Abstract
There is disclosed a resistance measuring mechanism in a resistance welding machine for calculating a resistance value in an arbitrary portion of the resistance welding machine. The resistance measuring mechanism comprises means for detecting temperature of an exit through which cold water for cooling a cable flows and the temperature of parts of cables, means for detecting voltage at a secondary or a primary winding of a welding transformer and means for detecting welding current at the secondary or the primary winding of the welding transformer characterized in that resistance value at a measuring temperature is calculated by correcting the resultant detected temperature, voltage, welding current for voltage, welding current at a reference temperature.