Motorless bias-field device and method having magnetic coupling

Details Motorless bias-field device and method having magnetic coupling Motorless bias-field device and method having magnetic coupling

1997-02-14

1998-06-16

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360114, 428694ML, G11B 1100

Patent

active

057682208

ABSTRACT:
A bias-field device for a magneto-optical system having a magneto-optical recording element which includes a conductive substrate and which moves through a magnetic field created by the bias-field device so that information is selectively recorded on or erased from the recording element, the device comprises: a rotatable magnet that rotates so that when the recording element rotates the conductive substrate creates a magnetic coupling with the magnet for causing the magnet to rotate; and an escapement mechanism that releases and latches the magnet for permitting the magnet to be selectively rotated.

REFERENCES:
patent: 5020042 (1991-05-01), Fearnside et al.
patent: 5072432 (1991-12-01), Tanaka
patent: 5291345 (1994-03-01), Umeda et al.
patent: 5402410 (1995-03-01), Yoshimura et al.
patent: 5570329 (1996-10-01), Furlani
patent: 5637411 (1997-06-01), Shimazaki et al.

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