US PATENT SUBCLASS 219 / 232
.~.~.~.~ Internal arc-type heating unit

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

200  DF  HEATING DEVICES {14}
221  DF  .~ Tool or instrument {2}
227  DF  .~.~ Hand-manipulative {4}
229  DF  .~.~.~ With heated tip or other heat concentration means (i.e., heat applied to localized area) {5}
232.~.~.~.~ Internal arc-type heating unit

DEFINITION

Classification: 219/232

(under subclass 229) Subject matter wherein the tool or instrument utilizes an electric arc for the source of heat for the tip of the tool or instrument.

SEE OR SEARCH THIS CLASS, SUBCLASS:

121.11+, particularly subclass 129 for arc type heaters where the arc is drawn between the metal to be heated and an electrode or the arc is contiguous to the metal rather than internally of a tool or instrument. See also subclasses 54, 60+ and 69+ where an arc heater is utilized in the heating, cutting, or disintegration of metals.

383+, for electric arc heaters wherein the arc influences or passes through nonmetallic material to be heated.

SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices, appropriate subclasses for space discharge devices, per se. 314, Electric Lamp and Discharge Devices: Consumable Electrodes, appropriate subclasses for arc lamp, per se, of the consumable electrode type.

315, Electric Lamp and Discharge Devices: Systems, appropriate subclasses for systems for supplying electrical energy to discharge apparatus. See the Class 315 "Search Class" note to Class 219 for the line between Class 219 and Class 315.