Method and apparatus for monitoring arc welding

Details Method and apparatus for monitoring arc welding Method and apparatus for monitoring arc welding

1979-04-25

1980-09-30

Britton, Howard W.

Electric heating

Metal heating

By arc

219147, 350311, 358101, 358108, 358225, B23K 900, B23K 932, H04N 718

Patent

active

042257719

ABSTRACT:
A method and apparatus for lowering the contrast range between a welding arc and its surroundings for remote viewing of an arc welding process. A monochromatic light source (10) is used to illuminate the area surrounding the welding arc (18) and a narrow band interference filter (22) tuned to the wavelength of the monochromatic light (10), is placed in front of a viewing camera (24). The monochromatic light enhances the arc background while the filter (22) attenuates the arc illumination that reaches the camera for a more desirable contrast ratio so that the arc, weld puddle and surrounding area can be visible with a high degree of definition on the monitor.

REFERENCES:
patent: 2194573 (1940-03-01), Schulz
patent: 2481808 (1949-09-01), Barna
patent: 3227866 (1966-01-01), Peters
patent: 3526748 (1970-09-01), Rienks
patent: 3732412 (1973-05-01), Tyroler
patent: 3781512 (1973-12-01), Grubbs
patent: 3916145 (1975-10-01), Grubbs
patent: 4001497 (1977-01-01), Bosworth
patent: 4021840 (1977-05-01), Ellsworth
patent: 4045125 (1977-08-01), Farges
patent: 4118732 (1978-10-01), Ichijima

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