Disc recording and/or reproducing apparatus that positions the m

Details Disc recording and/or reproducing apparatus that positions the m Disc recording and/or reproducing apparatus that positions the m

1994-10-04

1996-09-17

Wolff, John H.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369 772, G11B 3302, G11B 1100

Patent

active

055575897

ABSTRACT:
A disc type detection arm contacts a disc type opening formed in a disc cartridge when the disc cartridge is loaded into a recording and/or reproducing apparatus. The disc type detection arm determines the type of disc which has been loaded by the depth of the disc type opening, and controls the positioning of the magnetic head in response thereto. The magnetic head is spaced-apart from the disc when a read-only type disc is loaded, and positioned close to the disc when a read/write disc is loaded.

REFERENCES:
patent: 4716479 (1987-12-01), Sakamoto et al.
patent: 4740937 (1988-04-01), Watanabe
patent: 4837758 (1989-06-01), Motoyama et al.
patent: 4868695 (1989-09-01), Quatro et al.
patent: 5072431 (1991-12-01), Ohmori et al.
patent: 5224079 (1993-06-01), Inoue
patent: 5226024 (1993-07-01), Mukawa
patent: 5309421 (1994-05-01), Fujisawa

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