Plasma torch starting circuit

Details Plasma torch starting circuit Plasma torch starting circuit

1977-09-26

1980-09-30

Envall, Jr., Roy N.

Electric heating

Metal heating

By arc

219121P, B23K 906

Patent

active

042257697

ABSTRACT:
A plasma torch system is provided which creates a pilot arc having high instantaneous power and low average power. The pilot arc ignition circuit reduces the pilot arc duty cycle by pulsing on the pilot arc and then extinguishing it. A plasma torch disclosed also reduces RF noise in the line by eliminating the additional spark gap typically used in the power supply circuit and by placing the triggering circuit on or adjacent the torch handle.

REFERENCES:
patent: 3174027 (1965-03-01), Manz
patent: 3354289 (1967-11-01), Haase et al.
patent: 3551741 (1970-12-01), Tajbl et al.
patent: 3637974 (1972-01-01), Tajbl et al.
patent: 3849670 (1974-11-01), Lourigan
patent: 3876855 (1975-04-01), Hirasawa et al.
patent: 4061899 (1977-12-01), Gillitzer et al.

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