US PATENT SUBCLASS 338 / 87
.~ Contact adjustably inserted into resistance element (e.g., penetrating type)

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

68  DF  MECHANICALLY VARIABLE (E.G., RHEOSTAT) {24}
87.~ Contact adjustably inserted into resistance element (e.g., penetrating type) {1}
88  DF  .~.~> Powdered element

DEFINITION

Classification: 338/87

(under subclass 68) Subject matter wherein a contact extends into the resistance element and is movable therein to vary the spacing through this resistance element between this contact and another contact, thus to vary the resistance value between the contacts.

SEE OR SEARCH THIS CLASS, SUBCLASS:

80+, for mechanically variable liquid resistors.

92+, for mechanically variable resistors whose resistance elements are adjustably short-circuited.

322, for resistors with a driven or pressed terminal.

331, for resistors generally whose element surrounds one of the terminal.