US PATENT SUBCLASS 219 / 234
.~.~.~.~.~ Work in circuit

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}
233  DF  .~.~.~.~ Tip in electrical circuit {2}
234.~.~.~.~.~ Work in circuit

DEFINITION

Classification: 219/234

(under subclass 233) Subject matter wherein the tip is composed of one or more electrodes which comprise the heater, per se, or the heater may be formed of one or more highly resistive elements contiguous to or adjacent the tip which heater completes its electrical circuit through means, usually the work, not part of the tool or instrument and its electrical circuitry to its power source.

(1) Note. If the claimed combination includes the solder or brazing material in addition to the hand tool or instrument the patent should be placed in subclass 230 and cross referenced in this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

137.2+, for metal heating apparatus for producing a heating arc between the work and an electrode.

230, for clamping means combined with a heated tip tool where the clamping means is not part of the heating circuit.

284+, for heaters wherein the liquid heated is in the electrical circuit.

SEE OR SEARCH CLASS 65, Glass Manufacturing,

40, and 135.6+ for processes of heating glass by passing an electric current therethrough; subclass 511 for means to heat a fiber or filament utilizing electric or electromagnetic heat.

81, Tools,

9.22, for an implement with electrical circuitry to simultaneously mark on and perforate the surface (e.g., pen, tattooing device).

148, Metal Treatment, particularly

520, 525, and 565 for processes of significant heat treatment of metal to modify or maintain the internal physical structure (i.e., microstructure) or chemical property of metal wherein electrical heating is utilized. See the Class Definition of Class 148 to determine what constitutes significant heat treatment.

156, Adhesive Bonding and Miscellaneous Chemical Manufacture,

275, for methods of surface bonding wherein the work constitutes a conductor in an electrical circuit.

373, Industrial Electric Heating Furnaces,

120+, for furnaces wherein the charge may be in circuit.