US PATENT SUBCLASS 338 / 79
.~ With element winding and/or unwinding


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

68  DF  MECHANICALLY VARIABLE (E.G., RHEOSTAT) {24}
79.~ With element winding and/or unwinding


DEFINITION

Classification: 338/79

(under subclass 68) Subject matter wherein the resistance element is wound on a core, and is adapted to be unwound therefrom as on a second core to change the value of the resistance between terminals.

(1) Note. Examples of subject matter here include a resistor whose element is wound from an insulating core to a conducting core, the conducting core short-circuiting the portion of the resistance element wound thereon; and a resistor whose element is wound between two cores with a contact slidably engaging the portion of the element between cores.

SEE OR SEARCH THIS CLASS, SUBCLASS:

150+, for variable resistors in which the resistance element moves.

296+, for helical or wound resistors generally.

SEE OR SEARCH CLASS

242, Winding, Tensioning, or Guiding, 370+, for a general use reeling device which unwinds and rewinds the same material.

334, Tuners,

38, for a tuner having a reactance element which is adapted to be wound or unwound from a core or support.

336, Inductor Devices,

15, for inductor devices with coil winding and/or unwinding.