(under subclass 209) Subject matter wherein the magnet or electromagnet has a superconductive element included therein as an active element of the magnet.
(1) Note. Superconductivity is the property exhibited by some metals, alloys and compounds wherein the reduction of the temperature of the material to within a few degrees of absolute zero causes a steady fall in the resistance of the material until a critical temperature (transition temperature) is reached, and then the resistance falls suddenly to zero or practically to zero.
(2) Note. This subclass provides for magnets or electromagnets with superconductors included therein as an active portion of the magnet or electromagnet, but does not provide for superconductors, per se. Superconductors are found in various classes, depending upon the type of device
which the superconductor is used. See the search notes below for other superconductors.
SEE OR SEARCH THIS CLASS, SUBCLASS:
217, for temperature responsive type magnets or electromagnets that do not involve super-conductivity.
SEE OR SEARCH CLASS 174, Electricity: Conductors and Insulators,
15.4+, and 125.1 for superconductor structure.
336, Inductor Devices,
155, for super-conductive inductive devices with no relatively moving parts.
361, Electricity: Electrical Systems and Devices,
139+, for electric circuits for electromagnets including super-conductors.
