Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2005-01-18
2005-01-18
Patidar, Jay (Department: 2862)
Electricity: measuring and testing
Magnetic
Displacement
C324S207120
Reexamination Certificate
active
06844721
ABSTRACT:
The invention relates to a method and device for providing damping in a displacement device that moves an element. The displacement device has a permanent magnet generating a first magnetic field and a first coil movable with the element. The first coil receives a selected current from an external source to generate a second magnetic field. The damping method includes moving a second coil in at least one magnetic field to generate a current in the second coil. The method includes varying the current in the second coil to vary the damping in the displacement device.
REFERENCES:
patent: 2226847 (1940-12-01), Clark
patent: 4127889 (1978-11-01), Asano et al.
patent: 4848141 (1989-07-01), Oliver et al.
Aurora Reena
Koehler S.
MTS Systems Corporation
Patidar Jay
Westman Champlin & Kelly P.A.
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