Electric heating – Metal heating – By arc
Reexamination Certificate
2005-10-31
2010-11-30
Hoang, Tu B. (Department: 3742)
Electric heating
Metal heating
By arc
C219S130210, C219S1370PS
Reexamination Certificate
active
07842903
ABSTRACT:
A welding system for performing a short arc welding process between a advancing wire electrode and a workpiece. The system comprises a power source with a controller for creating a current pulse introducing energy into the electrode to melt the end of the electrode and a low current quiescent metal transfer section following the end of the melting pulse during which the melted electrode short circuits against the workpiece; a timer to measure the actual time between the end of the pulse and the short circuit; a device for setting a desired time from the pulse to the short circuit; a circuit to create a corrective signal based upon the difference between the actual time and the desired time; and, a circuit responsive to the corrective signal to control a given parameter of the current pulse.
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Hahn Loeser & Parks LLP
Hoang Tu B.
Jennison Brian
Lincoln Global Inc.
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