(under subclass 61) Subject matter wherein the variable mutual inductance device consists of two coils connected in series and so mounted that one coil can be rotated within the magnetic field or the electric and magnetic field of the other.
SEE OR SEARCH CLASS
323, Electricity: Power Supply or Regulation Systems,
216, 264, and 347 for transformer systems with movable structure or windings.
333, Wave Transmission Lines and Networks,
24+, for coupling networks, including filters, equalizers and delay networks having relatively movable coils, and especially subclasses 177+ for transformer coupled wave filters.
336, Inductor Devices, 115+, for inductor structures having relatively movable coils.