(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.
