US PATENT SUBCLASS 338 / 174
.~.~.~.~ With collector ring

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}
162  DF  .~.~.~ Contact angularly slidable {11}
174.~.~.~.~ With collector ring {1}
175  DF  .~.~.~.~.~> Ring, a shaft-bearing

DEFINITION

Classification: 338/174

(under subclass 162) Subject matter wherein a conducting ring or arcuate portion of a ring is provided which is electrically connected to or constitutes one terminal of the resistor, the contact or its arm or conducting structure movable with the contact slidably engaging the ring to convey the electrical energy from the terminal to the contact.

SEE OR SEARCH THIS CLASS, SUBCLASS:

146, for a helical resistor with a following contact and a helical collector bar parallel to the helical resistance element.

188, for mechanically adjustable resistors having an intervening connector such as a tap between the contact and element and including a collector bar or ring.