Electric heating – Metal heating – By arc
Reexamination Certificate
2007-03-20
2007-03-20
Shaw, Clifford C. (Department: 1725)
Electric heating
Metal heating
By arc
Reexamination Certificate
active
10881505
ABSTRACT:
A safety interlock system for an arc welder is described. The safety interlock system is interfaced with and turns on the arc welder in response to a user pressing a button15.There may be an optional delay from when the user presses the button until when the arc welder is turned on. The safety interlock system maintains the arc welder operative for a predetermined period of time within which time an arc must be struck. The safety interlock system has a latching circuit29responsive to a parameter indicative of a welding operation underway, and will maintain the arc welder operative until the parameter ceases. Once the parameter ceases or if an arc is not struck within the predetermined period of time, the safety interlock system turns off the arc welder.
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Bruszewski Zdzislaw
Potts Brian
Bruszewski Zdzislaw
Hogan & Hartson LLP
Shaw Clifford C.
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