Device to control power source

Details Device to control power source Device to control power source

2007-07-03

2007-07-03

Shaw, Clifford C. (Department: 1725)

Electric heating

Metal heating

By arc

Reexamination Certificate

active

10911135

ABSTRACT:
A device to control operation of a power source for an electric arc welder comprising an oscillator for inducing a high frequency voltage into a series circuit including the welding gap, a detector tuned to the high frequency for sensing the level of current in the series circuit at the high frequency and an output circuit to create a start signal when the received signal level exceeds a given value representing a resistance in said gap below a given amount.

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patent: 5117088 (1992-05-01), Stava
patent: 6548784 (2003-04-01), Sammons et al.
patent: 6570130 (2003-05-01), Kooken et al.
patent: 6770846 (2004-08-01), DeCoster et al.

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