Plasma torches
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United States of America Patent
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-
Sep 9, 1986
Grant Date -
N/A
app pub date -
Sep 12, 1983
filing date -
Sep 16, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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