Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1992-09-14
1994-09-06
Pascal, Robert J.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360114, G11B 1304
Patent
active
053454316
ABSTRACT:
A write-erase magnet assembly for a data storage device including: a permanent magnet having a longitudinal axis and having a first longitudinally extending face portion with a first polarity and a second longitudinally extending face portion with a second polarity opposite the first polarity for alternately producing write and erase magnetic bias fields on an adjacently positioned data storage medium; a magnet support assembly for rotatably supporting the permanent magnet; a magnetic detent fixedly positioned relative to the longitudinal axis of the permanent magnet for magnetically producing a biasing torque on the magnet tending to orient the closer of the first and second face portions of the permanent magnet in adjacent relationship with the detent. A coil for applying flipping torque and braking torque for an eddy current rotation dampening assembly are also disclosed.
REFERENCES:
patent: 4701894 (1987-10-01), Watson
patent: 4701895 (1987-10-01), Vansant
patent: 4748606 (1988-05-01), Naito et al.
patent: 4962492 (1990-10-01), Mathildus et al.
patent: 4977549 (1990-12-01), Berg
patent: 5020042 (1991-05-01), Fearnside et al.
Berg Thomas E.
Christie Leslie G.
Crane Melvin C.
Jones David P.
Oliver Thomas C.
Dinh Tan
Hewlett--Packard Company
Pascal Robert J.
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