Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1977-11-03
1980-08-05
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record medium
In container
360 99, G11B 2302, G11B 5012
Patent
active
042165113
ABSTRACT:
A flexible disc is provided for the recording and playback of information on a recording surface thereof. The disc is contained within a cartridge housing which protects the recording surface. At least one opening is provided in the disc which is in permanent engagement with at least one pin member of a drive hub, the drive hub providing rotation to the disc when the drive hub is rotated. The outer perimeter of the opening in the disc is larger than the outer perimeter of the pin member so that the disc is free to move laterally along the pin. At least one surface of the cartridge housing acts as a smoothing plane; rotation of the disc causes the disc to rise above such surface creating an air cushion between the flexible disc and surface, with the disc seeking its own level above the smoothing plane surface. The hub, which is retained within the cartridge housing, is accessible through an opening in the housing for coupling the hub to a rotational means such as the drive shaft of a motor or other drive mechanism. The drive shaft includes an end member having a latch member in the form of a radial projection on the outer perimeter thereof. The hub member includes a latch member in the form of a radial projection on the inner perimeter thereof, the end member of the shaft being mateable with the hub member through the opening in the cartridge housing in such a manner that the latch members engage when the cartridge is in place and the shaft member is in rotation. Another opening is provided in the cartridge housing for receiving a recording and/or playback head; the head is moveable within such opening so that it may be selectively indexed to read and/or write information on a plurality of tracks as the disc rotates within the cartridge.
REFERENCES:
patent: 3475741 (1969-10-01), Toney
patent: 3529301 (1970-09-01), Hiruta
patent: 3947893 (1976-03-01), Hall, Sr.
patent: 4057840 (1977-11-01), Wingo
IBM Technical Disclosure Bulletin, vol. 19, No. 7 12-76, "Cartridge for Magnetic Disc" by King et al.
IBM Tech. Discl. Bulletin, vol. 19, No. 12, "Encased Flexible Magnetic Disc. Wiper" by Bolham.
McCord William K.
Sadacca Stephen S.
Sharp Mel
Texas Instruments Incorporated
Wolff John H.
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