Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1983-10-11
1988-03-22
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 71, 360 99, 369 772, 369261, 369262, G11B 1704, G11B 1703, G11B 1904, G11B 1910
Patent
active
047333146
ABSTRACT:
A disc unit in which a disc which is inserted into the data storage disc unit in a wrong direction or upside down is automatically discharged from the disc unit. Such a wrong insertion of the disc is detected in response to an index signal generated every time the disc makes one rotation or by detecting an aperture of a disc cassette in which the disc is accommodated.
REFERENCES:
patent: 3966330 (1976-06-01), Ridler et al.
patent: 4040107 (1977-08-01), Bryer
patent: 4168835 (1979-09-01), Omiya et al.
patent: 4413291 (1983-11-01), Ueki et al.
patent: 4620249 (1986-10-01), Suzaki et al.
Yanker, "Diskette Orientation Detector and Ejector", IBM Tech. Disc. Bull., vol. 23, No. 7A, Dec. 1980.
Olson, "Circuitry for Testing the Translatory Movement of a Magnetic Diskette into a Disk Drive", IBM Tech. Disc. Bull., vol. 21, No. 11, Apr. 1979.
Russell et al., "Index Amplifier Control for Detecting Diskette in Disk Drive", IBM Tech. Disc. Bull., vol. 22, No. 1, Jun. 1979.
Kato Masahiro
Ogawa Tetsu
Canon Denshi Kabushiki Kaisha
Hecker Stuart N.
Urcia Benjamin E.
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