Electric heating – Metal heating – By arc
Patent
1977-10-04
1979-09-25
Goldberg, E. A.
Electric heating
Metal heating
By arc
219123, 2191241, 21912422, B23K 910
Patent
active
041692241
ABSTRACT:
Apparatus is provided for controlling a parameter of an arc welding machine, such as the height and/or the lateral position of the welding tool. The apparatus includes a parallel circuit having first and second branches connected to a source of voltage, wherein the first branch includes the arc welding machine to be controlled, and wherein the second branch includes an electrical analog of the current-voltage characteristics of the welding machine when operating as desired. A differential amplifier is provided for comparing the current in the first and second branches and providing a parameter-indicative signal representing the current difference between the first and second branches. In addition, a control circuit is responsive to the parameter-indicative signal and is provided for adjusting various parameters of the welding machine, including the height of the welding tool and/or the lateral position of the welding tool.
REFERENCES:
patent: 2949391 (1960-08-01), Anderson
patent: 2994763 (1961-08-01), Schultz
patent: 3484667 (1969-12-01), Wofsey
patent: 3511966 (1970-05-01), Bone
patent: 3538299 (1970-11-01), Daggett
patent: 3551637 (1970-12-01), Lampson
Goldberg E. A.
Shaw Clifford C.
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