US PATENT SUBCLASS 338 / 173
.~.~.~.~.~ Contact separable from resistance element

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338 /   HD   ELECTRICAL RESISTORS

68  DF  MECHANICALLY VARIABLE (E.G., RHEOSTAT) {24}
118  DF  .~ Movable contact electrically adjustable over length of resistance element {21}
160  DF  .~.~ Contact slides along in contact with element {3}
162  DF  .~.~.~ Contact angularly slidable {11}
172  DF  .~.~.~.~ With switching {1}
173.~.~.~.~.~ Contact separable from resistance element

DEFINITION

Classification: 338/173

(under subclass 172) Subject matter wherein the contact slidable on the resistance element is separable from the element by being rotated beyond the end of the element or by being lifted from the element (usually by rotational or axial movement of the shaft) to break the electric circuit through the resistance.

SEE OR SEARCH THIS CLASS, SUBCLASS:

185+, for variable tap type resistors in which the movable contact may be disconnected from the taps of the resistor element during operation of the resistor.

198, for variable resistors generally with a switch actuated by the resistor actuator.