(under subclass 61) Subject matter in which a plurality of coils or windings are so arranged as to have a core common to all the coils or winding with the core, when moved, causing the inductance of each of the plural coils or windings to vary simultaneously.
(1) Note. A single winding of wire having a plurality of tap connections, each of which is adapted to be connected to different circuits, is considered formed by a plurality of coils connected together to form a single winding or coil and is properly classified in this subclass if the coils have a common core for adjusting the inductance value of the coils.
SEE OR SEARCH CLASS
336, Inductor Devices,
118, and 130+ for inductor device structures having relatively movable core and coils.
343, Communications: Radio Wave Antennas, 748, for loop type antennae with a variable reactance for tuning the antenna.