US PATENT SUBCLASS 338 / 181
.~.~.~.~.~ Screw, a fine-adjustment

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}
160  DF  .~.~ Contact slides along in contact with element {3}
176  DF  .~.~.~ Contact rectilinearly slidable {6}
180  DF  .~.~.~.~ Screw-operated {1}
181.~.~.~.~.~ Screw, a fine-adjustment

DEFINITION

Classification: 338/181

(under subclass 180) Subject matter including structure which permits sliding the contact along the resistance element by direct application of linear force on the contact for a coarse adjustment of the contact, the screw providing a fine or vernier adjustment.

(1) Note. Usually here the screw and nut threads are readily separable, or the threads have a large pitch to permit direct adjustment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

122+, for mechanically variable resistors with coarse and fine resistance elements.