Electric arc pulse welder with short circuit control

Electric heating – Metal heating – By arc

Reexamination Certificate

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Details

C219S130210

Reexamination Certificate

active

10815078

ABSTRACT:
An electric arc welder with a waveform generator controlled to create a welding process involving current flow between an electrode and a workpiece wherein the welding process comprises a succession of pulse waveforms, each having a current ramp up portion, a peak current portion, a current ramp down portion and a background current portion, a voltage sensing circuit to sense a short circuit between the electrode and the workpiece and a reset circuit to reset the waveform generator upon sensing of a short circuit. The preferred electrode is a solid wire which may be in the form of a metal cored wire.

REFERENCES:
patent: 4697062 (1987-09-01), Awano et al.
patent: 4866247 (1989-09-01), Parks et al.
patent: 6441342 (2002-08-01), Hsu
patent: 6498321 (2002-12-01), Fulmer et al.
patent: 6617549 (2003-09-01), Ihde

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