Optical monitoring device for determining faults in a plasma bur

Details Optical monitoring device for determining faults in a plasma bur Optical monitoring device for determining faults in a plasma bur

1984-11-01

1986-11-04

Paschall, M. H.

Electric heating

Metal heating

By arc

219121P, 219121PH, 21913021, 31511121, 356316, B23K 1500

Patent

active

046211845

ABSTRACT:
A device for monitoring the arc of a plasma burner employs a photo-sensitive device to receive light from the plasma arc via at least one narrow band filter, the wavelength range of the filter being centered on the spectral response characteristic of a material in the burner or the plasma nozzle. A monitoring circuit detects when the output of the photo-sensitive device increases, indicating fault conditions in the arc.

REFERENCES:
patent: 3602683 (1971-08-01), Hishida et al.
patent: 4093844 (1978-06-01), Fellure et al.
patent: 4328068 (1982-05-01), Curtis
patent: 4446354 (1984-05-01), Kearney

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