US PATENT SUBCLASS 338 / 147
.~.~.~ Resistor formed as a flat spiral

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}
143  DF  .~.~ Contact moves along turns of helical resistance element {6}
147.~.~.~ Resistor formed as a flat spiral

DEFINITION

Classification: 338/147

(under subclass 143) Subject matter wherein a relatively long resistance element is arranged in a flat spiral configuration, the contactor track or path being in a plane parallel with the spiral element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

207, for a fixed resistor in which the element and base are rolled together.

297, for a helical or wound resistance element formed as a flat spiral.