(under subclass 244) Subject matter wherein the apparatus to sense and indicate the sensing of a magnetic field includes a sensor of the magnetic field or a magnetic shield for the apparatus to sense a magnetic field made of a material which has nearly zero resistance in one state and appreciable resistance in a second state.
(1) Note. Superconductivity is a property possessed by some metals, alloys, or compounds whereby the electrical resistance of the metals, alloys, or compounds decreases until a critical temperature is reached and the resistance becomes practically zero when the temperature of the metal, alloy, or compound is reduced to within a few degrees of absolute zero.
(2) Note. The apparatus to produce the low temperatures in the superconductors in order to permit the superconductors to function as a shield or a magnetic field sensor is not always claimed.
SEE OR SEARCH CLASS
29, Metal Working,
599, for processes of manufacturing superconductor electrical devices.
323, Electricity: Power Supply or Regulation Systems, 44, for transformer systems using superconductors.
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
527+, for miscellaneous superconductive circuits.
331, Oscillators,
107, for superconductive oscillators using a superconductive active element.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,
216, for superconductive magnets and electromagnets.
338, Electrical Resistors,
32, for superconductive resistors, per se.
365, Static Information Storage and Retrieval,
160+, for superconductive magnetic storage systems.
377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems,
93, for electrically operated registers using superconductors.
