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:
Aug. 22, 1978
Filed:
Apr. 26, 1976
Takeshi Oku, Kawanishi, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A welding control circuit comprises a differential type operational amplifier preferably having at least first, second and third input terminals. A signal S.sub.1 corresponding to the desired output of an electric welder to be controlled is applied to the first input terminal of the amplifier; a signal S.sub.0 for setting the output of the welder to initially approximate the desired output is applied to the second input terminal of the amplifier; and a feedback signal S.sub.2 is applied from the welder to the third input of the amplifier. The circuit constants of the adder-subtractor circuit are selected so that the ratio of the output S of the adder-subtractor circuit to the input signal S.sub.0 is a (in the absence of other input signals) whereas the ratio of the output S to the input signals S.sub.1 and S.sub.2 is b (in the absence of other input signals). The adder-subtractor circuit is connected so that its output is given by S = aS.sub.0 + b(S.sub.1 - S.sub.2).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile