(under the class definition) Adjustable inductor devices wherein the inductance variation is attained by changing the physical shape of either the coil or core or both, usually by physically displacing portions of the coil or core relative to other portions of the coil or core respectively, by bending, twisting or stretching.
(1) Note. The following are illustrative examples: [figure] [caption](a) The core is deformed [figure] [caption](b) The coil is deformed
(2) Note. This subclass includes variable inductor devices having a core or core part formed of magnetostrictive material which material exhibits a change in volume and in magnetizing properties when placed under mechanical stress.
SEE OR SEARCH THIS CLASS, SUBCLASS:
15, for adjustable inductor devices wherein the deformation or distortion of the coil conductor is that caused by winding and/or unwinding the conductor.
115+, for inductor devices having two or more coils which are movable relative to each other. 130, for inductor devices having a relatively movable magnetic core and coil.
SEE OR SEARCH CLASS
331, Oscillators,
157, for oscillator systems having a frequency determining element comprising electromechanical resonator of the magnetostrictive type.
343, Communications: Radio Wave,
868, for loop type antennas with an adjustable configuration, area, or coil length.
367, Communications, Electrical: Acoustic Wave Systems and Devices,
168, for magnetostrictive electro-acoustic or electro-vibrational transducers.
369, Dynamic Information Storage or Retrieval,
146+, for magnetostrictive transducers for electromechanical recording or reproducing.
381, Electrical Audio Signal Processing Systems and Devices,
150+, for electro-acoustical transducers of the magnetostrictive type for use in telephony. Subclasses 150+ includes transmitters and receivers.
