US PATENT SUBCLASS 219 / 69.1
.~.~ Electric arc

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

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
68  DF  .~ Cutting or disintegrating (e.g., machining engraving) {2}
69.1.~.~ Electric arc

DEFINITION

Classification: 219/69.1

Electric arc:

(under subclass 68) Subject matter utilizing a continuous or sustained electric space discharge between an electrode and a work piece.

(1) Note. The disintegrating action of the arc may be assisted, e.g., by a flow of compressed air or oxygen.

SEE OR SEARCH THIS CLASS, SUBCLASS:

121+, for this subject matter not utilized for cutting or disintegrating.

SEE OR SEARCH CLASS

148, Metal Treatment,

9.5, for using heat to desurface or gorge metal.

204, Chemistry: Electrical and Wave Energy, 224, for apparatus used for electrochemical machining.

266, Metallurgical Apparatus,

48, for flame cutting apparatus.