Cutlery
Patent
1977-06-15
1979-05-15
Skudy, R.
Cutlery
F16C 3900
Patent
active
041544897
ABSTRACT:
Improved apparatus is disclosed for use in a magnetic suspension system for developing signals representative of the rate of displacement of a magnetically suspended body along one or more axes thereof for use in applying forces to the body to restore it to a desired stable position. Specifically there are provided a plurality of thin, closely-spaced discs of permanent magnet material affixed to the body and a plurality of conductive windings respectively cooperating with the magnetic fields produced by said magnets, pairs of said windings being interconnected so that currents induced therein by the fields of the magnets tend to reinforce each other and so that currents induced therein by stray fields tend to cancel. The resultant currents induced in the windings are representative of rate of displacement of the suspended body and may be combined with separately derived signals representative of displacement of the body for use in applying forces to the body to restore it to its desired stable position. By suitably arranging the permanent magnets and their cooperating windings, signals may be developed representative of rates of displacement along several different axes so as to permit complete control over all possible displacements of the suspended body. In addition, in certain embodiments of the invention, there may be provided means for deriving from the rate-representative signals, signals representative of acceleration of the suspended body which also may be used to control the application to the body of forces to restore it to its desired stable position.
REFERENCES:
patent: 3761148 (1973-09-01), Grosbard
patent: 3976339 (1976-08-01), Sabnis
patent: 4057369 (1977-11-01), Isenberg
Cambridge Thermionic Corporation
Ferrill, Jr. Thomas M.
Skudy R.
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