US PATENT SUBCLASS 338 / 101
.~.~ Pile type

Current as of: June, 1999
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338 /   HD   ELECTRICAL RESISTORS

68  DF  MECHANICALLY VARIABLE (E.G., RHEOSTAT) {24}
99  DF  .~ Surfaces pressed together (e.g., compressible type) {2}
101.~.~ Pile type {9}
102  DF  .~.~.~> With contactor moving along pile
103  DF  .~.~.~> With electromagnetic operator (e.g., electric motor) {3}
107  DF  .~.~.~> With electromagnetic holder
108  DF  .~.~.~> Pedal- or treadle-operated
109  DF  .~.~.~> With initial pressure adjustment
110  DF  .~.~.~> With switch actuated by resistor actuator
111  DF  .~.~.~> With intervening conducting structure
112  DF  .~.~.~> Contact surface area of piles variable
113  DF  .~.~.~> With resilient pressure-applying linkage

DEFINITION

Classification: 338/101

(under subclass 99) Subject matter wherein two or more masses of resistance material are formed as wafers or discs and are disposed on top of one another to form a pile, the engagement pressure being applied axially along the pile.

SEE OR SEARCH THIS CLASS, SUBCLASS:

115, for a mechanically variable resistor generally whose resistance element is formed as a pile.