Method and circuit for protecting plasma nozzle

Details Method and circuit for protecting plasma nozzle Method and circuit for protecting plasma nozzle

1991-04-12

1993-02-02

Reynolds, Bruce A.

Electric heating

Metal heating

By arc

B23K 1000

Patent

active

051839903

ABSTRACT:
A system, method and circuit for protecting a plasma nozzle of the type including an electrode within the nozzle and a paper supply for creating an arc between the electrode and nozzle for establishing a plasma issuing from the nozzle toward a workpiece, which system, method and circuit detects when the nozzle contacts or drags along the workpiece and shifts the power supply to a low current operating mode if the power supply is in a high current operating mode.

REFERENCES:
patent: 3558973 (1971-01-01), Pochert et al.
patent: 3809850 (1974-05-01), Saenger, Jr.
patent: 4330700 (1982-05-01), Jagieniak et al.
patent: 4585921 (1986-04-01), Wilkins et al.
patent: 4814577 (1989-03-01), Dallavalle et al.
patent: 4839499 (1989-06-01), Kotecki et al.
patent: 4929811 (1990-05-01), Blankenship
patent: 4975557 (1990-12-01), Yamada et al.
patent: 4987285 (1991-01-01), Dallavalle et al.
patent: 5036176 (1991-07-01), Yamaguchi et al.

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