(under subclass 228) Subject matter wherein a voltage is induced in an electrical coil as a result of the change in the magnetic test field caused by the material tested.
SEE OR SEARCH THIS CLASS, SUBCLASS:
219+, for testing material by placing a magnetic sensor within the material tested.
233, for the testing of material by a test device which compares the phase of a test magnetic field with the phase of the signal sensed by the magnetic sensor.
254, for fixed coil magnetometers responsive to a changing magnetic field.
257, for moving coil magnetometers.
260+, for magnetic field detection device sensors of the induced voltage type.
SEE OR SEARCH CLASS 323, Electricity: Power Supply or Regulation Systems,
355, for transformers to deliver power to a single load.
336, Inductor Devices, particularly
221, for coil and core, and subclasses 222+ and 225+ for electrical windings, per se, which introduce electrical inductance into an electrical circuit.
