Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1993-12-02
1995-10-31
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
G11B 3314
Patent
active
054635071
ABSTRACT:
The present invention provides a disk drive apparatus for use in computer systems where size and weight are of paramount concern. The disk drive apparatus includes a 2.5 inch disk that provides between 20-40 megabytes of storage within a footprint area of approximately 2.8 inches by approximately 4.0 inches. Further, the disk drive has a height of 0.630 inch or less. The height dimension is achieved, in part, by providing a low profile spin motor to rotate the disk. The low profile spin motor uses high energy magnets made of rare earth materials. The disk drive also employs a rotary actuator having a voice coil assembly of reduced height by using the housing as a flux return path for the magnetic fields produced by the voice coil motor. Also provided is a three-tiered housing that contains the disk which, when connected to a printed circuit board, produces the low profile disk drive apparatus.
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Computer Library Periodicals, Jan. 1989; Doc #3532 "Computer Design"; Nov. 1, 1988; vol. 27, No. 20, p. 105.
"Prairie Tek Planning 2 . . . " Doc #22800 PC Week Nov. 6, 1989 vol. 6, No. 44, p. 16.
Blagaila John
Dion F. Eugene
Furay David M.
Morehouse James H.
Shelstad Scott A.
Conner Peripherals, Inc.
Wolff John H.
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