Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1990-03-29
1992-06-09
Skudy, R.
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
310 52, 310 905, 25023113, 335126, 505700, 359234, H01B 1200
Patent
active
051207060
ABSTRACT:
A device employing frictionless bearings including a mass of superconductor material having a superconducting temperature T.sub.c above about 77.degree. K., a magnet having an axis of symmetry being levitated from said mass of superconductor material so as to be rotatable about its axis of symmetry, and a support member attached to the magnet, the support member being driven so as to cause the magnet to rotate about its axis of symmetry.
Additionally, there is included a frictionless commutator wherein a signal beam is intermittently interrupted by a member attached to the magnet, such intermittent interruption of the beam being detected and employed to cause alternate energization and de-energization of a solenoid which, in turn, creates a magnetic field. The solenoid magnetic field is employed to attract and repel second magnets positioned about the member so as to rotatably drive the first magnet.
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patent: 4892863 (1990-01-01), Agarwala
"Levitation of a magnet over a flat type II superconductor", J. Appl. Phys. 63(2), Jan. 15, 1988.
"Levitation effects involving high T.sub.c thallium based superconductors", Appl. Phys. Lett. 53(12), Sep. 19, 1988.
Ivester Hermann
Skudy R.
University of Arkansas
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