US PATENT SUBCLASS 392 / 334
.~.~.~.~ With means to adjust current path between electrodes

Current as of: June, 1999
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392 /   HD   ELECTRIC RESISTANCE HEATING DEVICES

*  DD  HEATING DEVICES (CLASS 219 SUBCLASS 200) {11}
311  DF  .~ Fluid-in-circuit type heater {6}
324  DF  .~.~ Steam or vapor generator {2}
333  DF  .~.~.~ Manually filled tank or container {3}
334.~.~.~.~ With means to adjust current path between electrodes

DEFINITION

Classification: 392/334

With means to adjust current path between electrodes:

(under subclass 333) Subject matter including means to vary the effective length or cross-sectional area of the current flow between the electrodes.

(1) Note. Generally the varying of the current path results in varying the resistance of the path and consequently the magnitude of the current.

SEE OR SEARCH THIS CLASS, SUBCLASS:

315, for continuous flow of fluid in fluid-in-circuit type heater.

323, for reservoir or tank.

329, for line connected boiler.

SEE OR SEARCH CLASS 323, Electricity: Power Supply or Regulation Systems,

296, for voltage or current regulating systems utilizing liquid resistors.

338, Electrical Resistors, particularly

80+, for mechanically variable or adjustable liquid resistors.

373, Industrial Electric Heating Furnaces,

29+, and 120+ for electric furnace structure including adjustable electrodes.