US PATENT SUBCLASS 219 / 137.71
.~.~.~.~ Circuits

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
121.11  DF  .~ By arc {16}
137.2  DF  .~.~ With consumable electrode device {4}
137.7  DF  .~.~.~ Rate control {1}
137.71.~.~.~.~ Circuits

DEFINITION

Classification: 219/137.71

Circuits:

(under subclass 137.7) Subject matter including electrical circuits for controlling the rate of feeding consumable filler to the welding arc.