Apparatus for controlling a plasma

Details Apparatus for controlling a plasma Apparatus for controlling a plasma

1984-06-25

1986-09-02

Paschall, M. H.

Electric heating

Metal heating

By arc

219121PR, 21913021, 219121PM, 31511151, B23K 900

Patent

active

046098100

ABSTRACT:
An apparatus for controlling a plasma discharge includes a light gathering tube remotely directed at the plasma discharge. The gathered light is transmitted, via a filter optic light pipe, to a detector that produces a signal that is compared with at least one reference signal. After comparing the signals the RF power to the plasma torch is either interrupted or continued.

REFERENCES:
patent: 3496327 (1970-02-01), Vilkas
patent: 3602683 (1971-08-01), Hishida et al.
patent: 4093844 (1978-06-01), Fellure et al.
patent: 4306175 (1981-12-01), Schleicher et al.
patent: 4328068 (1982-05-01), Curtis
patent: 4446354 (1984-05-01), Kearney

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