Plasma torches

Details Plasma torches Plasma torches

1983-09-12

1986-09-09

Paschall, M. H.

Electric heating

Metal heating

By arc

219 1055R, 219121PM, 219121PQ, 31511121, 31323131, B23K 900

Patent

active

046111085

ABSTRACT:
In an improved plasma torch, a metal tube delivers a plasma-generating gas to an end discharge outlet. The delivery tube is excited by microwave energy by means of a waveguide of rectangular cross-section. The tube traverses the waveguide through openings of larger diameter than the delivery tube. Metal sleeves are advantageously provided around the tube on each side of the waveguide. Two gases can be delivered to the plasma within concentric tubes. The plasma-formation zone can be moved further away from the waveguide by providing lateral impedance-matching devices along the sleeve.

REFERENCES:
patent: 3588594 (1971-06-01), Yamamoto et al.
patent: 4207452 (1980-06-01), Arai
patent: 4230448 (1980-10-01), Ward et al.
patent: 4473736 (1984-09-01), Bloyet et al.
Swift et al., A Microwave Plasma Torch, Mar. 1966, Electronic Engineering, vol. 38, No. 457, London, England, pp. 152-154.

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