Write and erase assembly for magneto-optic drive apparatus

Details Write and erase assembly for magneto-optic drive apparatus Write and erase assembly for magneto-optic drive apparatus

1994-08-02

1996-02-06

Epps, Georgia Y.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, G11B 1100

Patent

active

054901243

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: 4977549 (1990-12-01), Berg
patent: 4984224 (1991-01-01), Tsuyuguchi et al.
patent: 5022017 (1991-06-01), Jansen et al.
patent: 5038330 (1991-08-01), Tanaka
patent: 5043959 (1991-08-01), Minami et al.
patent: 5317548 (1994-05-01), Matsuda et al.
patent: 5351221 (1994-09-01), Ohno
patent: 5367508 (1994-11-01), Haba

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