(under subclass 137) Subject matter wherein the inductor coil
is provided with a plurality of contact means so that the change in inductance can be effected by adding or subtracting turns or coil portions in series to the portion of the coil connected in the circuit.
(1) Note. An illustrative example is: [figure]
SEE OR SEARCH THIS CLASS, SUBCLASS:
139, where the coil is a helical coil or spiral, and the contactor follows the conductor so as to make continuous-contact with the coil conductor.
142, where the connections to the coil are changed by moving the coil (i.e., movable coil and fixed contacts).
149, where a contactor slides along the coil conductor, making direct contact with the coil conductor. SEE OR SEARCH CLASS
307, Electrical Transmission or Interconnection Systems,
50, for tap changing means associated with a multi-cell battery which floats across another source of electrical energy.
310, Electrical Generator or Motor Structure,
189, for tapped field or excitation windings of dynamoelectric machines, and subclass 200 for tapped armature or primary windings of dynamoelectric machines.
323, Electricity: Power Supply or Regulation Systems,
255, and 340 for transformer systems with tapped windings.
