(under subclass 244) Subject matter wherein the apparatus to sense a magnetic field is a movable magnetic field sensing coil placed within the field to be tested and has means to move the movable coil, and the apparatus to indicate the sensing of the magnetic field is connected to the sensing coil whereby the coil moving in the tested field has induced therein a voltage proportional to the number of turns of the coil and the time it takes for the moving coil to complete a cycle of movement.
(1) Note. The sensing coil may or may not have a ferromagnetic core.
(2) Note. The movement may be rotary, vibrator, or translatory.
(3) Note. A single conductor sensing a magnetic field connected to an indicator is included in the subject matter of this subclass type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
323+, for geophysical surface or subsurface exploration which may include a moving coil magnetometer to detect objects below the surface of the earth or material within the earth or a magnetic field within the earth.
SEE OR SEARCH CLASS 33, Geometrical Instruments,
361, for indicators of direction of force traversing natural media which use a rotating or vibrating magnetic detector.
343, Communications: Radio Wave Antennas,
1, for radar devices which utilize a moving antenna, subclass 100 for directive radio systems that use a moving antenna, and subclass 757 for antennas with scanning, sweeping, or orienting means to move the antennas.
