Electric heating – Metal heating – By arc
Reexamination Certificate
2006-07-10
2009-08-11
Kerns, Kevin P (Department: 1793)
Electric heating
Metal heating
By arc
Reexamination Certificate
active
07573002
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: 2293079 (1942-08-01), Ranke
patent: 2636102 (1953-04-01), Lobosco
patent: 3236997 (1966-02-01), Johnson et al.
patent: 4125759 (1978-11-01), Kiyohara et al.
patent: 4301355 (1981-11-01), Kimbrough et al.
patent: 4721906 (1988-01-01), Ferguson et al.
patent: 4758707 (1988-07-01), Ogilvie et al.
patent: 4821202 (1989-04-01), Davis et al.
patent: 4897522 (1990-01-01), Bilczo et al.
patent: 5149940 (1992-09-01), Davis et al.
patent: 5278390 (1994-01-01), Blankenship
patent: 5304776 (1994-04-01), Buerkel et al.
patent: 5386096 (1995-01-01), Buda et al.
patent: 5416299 (1995-05-01), Tabata et al.
patent: 5864110 (1999-01-01), Moriguchi et al.
patent: 6335511 (2002-01-01), Rothermel
patent: 7091445 (2006-08-01), Myers et al.
patent: 1171917 (1984-07-01), None
patent: 1 157772 (1988-01-01), None
patent: 0570901 (1993-11-01), None
patent: 0671236 (1995-09-01), None
patent: 0970775 (2000-01-01), None
patent: 1206992 (2002-05-01), None
patent: 57-19175 (1982-02-01), None
patent: 62-096866 (1986-08-01), None
patent: 7-314136 (1995-12-01), None
patent: 2001-129667 (2001-05-01), None
patent: 2001-259837 (2001-09-01), None
patent: WO 01/02125 (2001-01-01), None
English Translation of Japanese document No. JP57-19175A.
Jack W. Crinshaw, Embedded 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.
Hahn Loeser & Parks LLP
Kerns Kevin P
Lincoln Global Inc.
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