US PATENT SUBCLASS 338 / 145
.~.~.~ Helical resistance element moves

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}
145.~.~.~ Helical resistance element moves

DEFINITION

Classification: 338/145

(under subclass 143) Subject matter wherein the helical resistance element is mounted for linear or rotational movement with respect to the structure mounting the contact, so that the position of the contact along the helix may be changed, or the helix may be moved to provide for an adjustment of the contact along the length of the helix.

(1) Note. Included here are helices which rotate to permit an adjustment of an angularly fixed contact along their length, or helices which are moved linearly to permit adjustment of a linearly fixed contact along their length.

SEE OR SEARCH THIS CLASS, SUBCLASS:

43, 44 and 46, for resistors responsive to change of inclination in which the resistance element may move.

79, for mechanically variable resistors with element winding and/or unwinding.

80+, for variable resistors of the liquid element type, especially subclass 86.

150+, for resistors whose element moves with respect to a fixed contact. SEE OR SEARCH CLASS

336, Inductor Devices,

115+, for relatively movable inductor coils, especially subclasses 117+.