(under subclass 1) Subject matter wherein one of the heating elements is an electric arc between two electrodes, or between an electrode and a current carrying material (e.g., the charge material).
SEE OR SEARCH THIS CLASS, SUBCLASS:
9, for arc furnaces with environmental control devices.
60, for arc furnace devices, per se.
SEE OR SEARCH CLASS
164, Metal Founding,
514, for electric arc heating apparatus used for metal casting.
219, Electric Heating, 121.11+, for arc metal heating, per se.
