Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1989-10-27
1991-10-22
Levy, Stuart S.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
369 752, 369 771, 369 772, 360114, G11B 2102, G11B 2112
Patent
active
050602071
ABSTRACT:
A magneto-optical recording/reproducing apparatus includes a frame, a cartridge containing therein a magneto-optical recording disk, an optical head for applying an optical beam on the recording disk, an electromagnet for applying a bias magnetic field on the recording disk, a cartridge holder for holding therein the cartridge, a mechanism for reciprocating the cartridge holder between an insertion position and a loading position in which a recording, a reproducing and an erasing operations are carried out, a turn table for rotating the recording disk on the loading position, and a driving mechanism. The driving mechanism drives the electromagnet close to the recording disk when it is to be in the loading position and away from the recording disk when it is to be in the insertion position in opposite directions perpendicular to a plane of the recording disk in accordance with movement of the cartridge holder. The driving mechanism is disposed on the cartridge holder and the electromagnet is so disposed as to interpose the recording disk between the optical head and the electromagnet.
REFERENCES:
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patent: 4674079 (1987-06-01), Agostini
patent: 4727444 (1988-02-01), Fukushima
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patent: 4796241 (1989-01-01), Hayakawa
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patent: 4837758 (1989-06-01), Motoyama
patent: 4964005 (1990-10-01), Uzuki
Kaneda Tokuya
Yokoi Chikazu
Hitachi , Ltd.
Levy Stuart S.
Pokotylo John C.
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