US PATENT SUBCLASS 338 / 121
.~.~ With nonlinearity correction


Current as of: June, 1999
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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}
121.~.~ With nonlinearity correction


DEFINITION

Classification: 338/121

(under subclass 118) Subject matter including structure which insures the same change in resistance value across the terminals with a given change or movement of the resistor actuator throughout the full operating range of the resistor, i.e., a straight line relationship exists between the value of the resistance across the terminals and the movement of the resistor actuator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89+, for mechanically variable resistors wherein a definite mathematical relationship exists between the value of the resistance across the terminals and movement of the resistor actuator.

120, for a resistor with a contact electrically adjustable over the length of theelement, together with an additional resistor which shunts the element at adjustably spaced points, which may connect for nonlinearities.

135, for a variable resistor of the movable contact type having a zero setting or phasing means.

138+, for tapered resistors of the mechanically variable type. 195, for resistors varied by removing or adding material which may give a linear effect.

202, for movable contact structure.

SEE OR SEARCH CLASS

336, Inductor Devices,

224, for inductors having nonuniform spaced turns which may give a linear effect.