Electric heating – Metal heating – By arc
Reexamination Certificate
2006-08-15
2006-08-15
Shaw, Clifford C. (Department: 1725)
Electric heating
Metal heating
By arc
C219S130510
Reexamination Certificate
active
07091445
ABSTRACT:
Electric arc welder (10) performs a given weld process with selected current waveform performed between electrode (24) and workpiece (26). Welder (10) includes a controller with a digital processor (30), sensor (44) for reading instantaneous weld current, and circuit (56) to convert the instantaneous current into a digital representation of the level of instantaneous weld current. Digital processor (30) has program circuit (64, 66) to periodically read and square the digital representation at a given rate, register (70, 72) for summing a number N of square digital representations to give a summed value, and an algorithm (82, 84, 86, 88) for periodically dividing the summed value by the number N to provide a quotient and then taking the square root of said quotient to thereby digitally construct rms signal (40) representing the root mean square of the weld current.
REFERENCES:
patent: 4125759 (1978-11-01), Kiyohara et al.
patent: 4821202 (1989-04-01), Davis et al.
patent: 5278390 (1994-01-01), Blankenship
patent: 5386096 (1995-01-01), Buda et al.
patent: 62-096866 (1986-08-01), None
patent: 2001-129667 (2001-05-01), None
patent: 2001-259837 (2001-09-01), None
Jack W. CrinshawEmbedded Systems Programming(Integer Square Root)—Feb. 1998.
Electrical Measurements and Heat Input Calculations for GMAW-P Process—Nov. 2001.
Hasan Robert
Houston William S.
Myers Russell K.
O'Donnell Timothy M.
Fay Sharpe Fagan Minnich & McKee LLP
Lincoln Global Inc.
Shaw Clifford C.
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