US PATENT SUBCLASS 338 / 185
.~.~ With intervening connector between contact and element (e.g., taps)

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}
185.~.~ With intervening connector between contact and element (e.g., taps) {6}
186  DF  .~.~.~> Connector formed as severed helical turns or as comb teeth
187  DF  .~.~.~> With arc suppressor
188  DF  .~.~.~> With collector bar or ring
189  DF  .~.~.~> With magnetic holder for controller arm
190  DF  .~.~.~> Angularly movable contact {2}
194  DF  .~.~.~> Rectilinearly movable contact

DEFINITION

Classification: 338/185

(under subclass 118) Subject matter wherein a plurality of otherwise electrically separate conducting structures are each electrically connected to the elongated element along its length, and a terminal being movable among the conducting structures to constitute a contact on such structures.

(1) Note. The most common subject matter in this subclass is a resistor whose element is tapped together with a contact movable along the taps, i.e., a tap changing resistor. The path of motion of the terminal need not be fixed for classification here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

72, for a tap type mechanically variable resistor in or on a lamp socket.

126, for a variable resistor with a plurality of tapped elements and a movable contact bridge.

140, for a variable tapered resistor of the tap type.

154, for a variable resistor having an intermediate conductive strip between the resistor element and the movable member usually to reduce wear. 323, for a resistor having terminals tapped along the resistance element.

325, for a resistor with three or more terminals.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers, especially

4, 6+ and 16, for multiple circuit control switches with movable contacts which may engage taps.

323, Electricity: Power Supply or Regulation Systems,

255+, for tap changing regulation systems.

336, Inductor Devices,

150, for adjustable tap changing inductors.