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:
Oct. 26, 1976
Filed:
Mar. 25, 1975
Akira Okada, Tokyo, JA;
Michio Inagaki, Tokyo, JA;
National Research Institute for Metals, Tokyo, JA;
Abstract
In welding a workpiece from its one side by arc or electron beam welding, a method of detecting the state of fusion of the workpiece which comprises superposing on the arc or electron beam current a signal current selected from the group consisting of positive and negative pulse currents and sinusoidal current to change the heat input applied to the workpiece at the side where the arc or electron beam has been applied, and measuring the waveforms and/or phase differences of the change of said heat input and the corresponding change of temperature at the opposite side of the workpiece, whereby the state of fusion of the workpiece is detected.