US PATENT SUBCLASS 338 / 149
.~.~.~ With contact stop

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}
149.~.~.~ With contact stop

DEFINITION

Classification: 338/149

(under subclass 143) Subject matter wherein significant stopping means is provided to positively limit or apply a positive stop to the movement of the contactor over the helical resistance element before reaching an end of the element so that the contact will remain in engagement with the element.

(1) Note. Subject matter generally found in this subclass consists of a nut, or projection located on the operating mechanism or housing of the resistance element, so that the contact upon reaching a predetermined point or points, such as the ends of the helical element, is prevented from any further movement.