Plasma-arc torch interlock with flow sensing

Details Plasma-arc torch interlock with flow sensing Plasma-arc torch interlock with flow sensing

1985-11-04

1987-05-05

Paschall, M. H.

Electric heating

Metal heating

By arc

219121PU, 219121PC, B23K 1500

Patent

active

046635157

ABSTRACT:
A plasma-art torch interlock with flow sensing is provided. A flow rate sensor is included within the conduit supplying working fluid to a plasma-arc torch. By sensing an increase in flow rate of the working fluid which is caused by a necessary part being not in place, a control circuit shuts off power to the torch. Pressure in the conduit may also be sensed and the power to the torch shut down if a minimum pressure needed for torch operation is not achieved. In a second embodiment, two conduits are provided to supply fluid to the torch. One conduit supplies the primary working fluid to create the plasma-arc while the other supplies secondary flow for purposes of cooling.

REFERENCES:
patent: 3558973 (1971-01-01), Pochert et al.
patent: 4035603 (1977-07-01), Fernicola
patent: 4339700 (1982-05-01), Jagieniak et al.

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