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:
Nov. 28, 1978
Filed:
Aug. 24, 1976
Boris E Paton, Kiev, SU;
Vladimir K Lebedev, Kiev, SU;
Nikolai V Podola, Kiev, SU;
Alexei P Obolonsky, Kiev, SU;
Other;
Abstract
In the course of welding measurements are taken of the concentration of metallic vapor in the cloud of vapor over the welding zone, the diameter of the hot spot on the article being welded being kept constant. Said concentration serves as an indication of the depth of fusion. The metallic vapor concentration is measured with the aid of a device comprising an electron quantity transducer, for example, a beam trap, with an electric filter connected to its output, said electric filter separating electric waves of frequencies upwards of 200 Hz. The alternating component thus separated is converted into d-c voltage and compared to a reference signal in a comparison circuit, upon which the electron beam current of the gun is altered, depending on the value of the error signal of said comparison circuit. The depth of fusion is found by way of changing the value of the output signal of the rectifier.