US PATENT SUBCLASS 219 / 233
.~.~.~.~ Tip in electrical 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.~.~.~.~ Tip in electrical circuit {2}
234  DF  .~.~.~.~.~> Work in circuit
235  DF  .~.~.~.~.~> With transformer secondary

DEFINITION

Classification: 219/233

(under subclass 229) Subject matter wherein the heated tip is in an electrical circuit and the tip itself or the tip and a highly resistive element part of the same circuit form the electrical heater of the tool or instrument.

(1) Note. Included herein is the subcombination of the hand held or manipulative tool or instrument which is the "gun" type tip, per se, with or without electrical terminals which is also the electrical heater of the tool or instrument.

(2) Note. The patents in this and the indented subclasses may use a granular, solid, loop or coiled wire type heater. Where the novelty resides in this type of heater, a search must be made in the appropriate subclasses of this class.

(3) Note. Cloth markers utilizing tip heaters which are part of the electrical circuit will be placed in this group of subclasses.

(4) Note. Included in this group of subclasses are needles, caponizers, cauterizing, coagulating, and cutting instruments of the same type found in the appropriate subclasses of Class 606, Surgery, subclasses 32+ for example.

SEE OR SEARCH THIS CLASS, SUBCLASS:

129+, for electrodes which are in the circuit for soldering or brazing purposes but use an arc heater rather than resistance heating of the tip and/or some high resistance material in the tool or instrument itself. SEE OR SEARCH CLASS

30, Cutlery,

140, for hand held electrically heated wires used as cutters which go beyond mere heating of the material such as the forming of ice cubes from a block of ice, dairy products cutters, and hot wire type razors.

56, Harvesters,

229, for a hand held electrically heated hot wire mower.

83, Cutting, for machine type cutters employing hot wire cutters and the cutting of plastic material where no molding or shaping takes place in addition to the cutting.

175, Boring or Penetrating the Earth,

16, for hot wire cutting of natural ice formations.

606, Surgery, see (4) Note to this subclass.