Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1987-09-22
1989-01-10
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360106, 360 9807, G11B 5105, G11B 1702, G11B 2102
Patent
active
047977620
ABSTRACT:
A Winchester disk drive assembly includes upper and lower mounting plates and shafts for the main drive motor assembly and for the head positioner firmly connected to both mounting plates. One end of the shafts is mounted to one of the mounting plates by a shouldered washer. A shouldered washer is mounted in a counterbored hole in the adjacent mounting plate and is firmly secured to the adjacent shaft end by a steel screw, with the dimensions of the washer being selected to provide space between the enlarged head portion of the washer, and the counterbore, so that the shaft is entirely stress-free. The space between the inner surface of the enlarged portion of the T-shaped washer and the counterbored recess is then filled with epoxy which bonds the two parts together. The shouldered washer then becomes an essential part of the adjacent mounting plate, and the mounting plate may be removed and separated from the shaft by removing the steel screw. The shouldered washer and the mounting plate may be formed of aluminum or an alloy thereof, and the epoxy may be filled with finely-divided aluminum particles, so that thermal cycling has no adverse effects.
REFERENCES:
patent: 4285016 (1981-08-01), Gilovich
patent: 4519010 (1985-05-01), Elsaesser et al.
patent: 4672487 (1987-06-01), Brand et al.
Kilmer Dan L.
Levy Lloyd
Maher Kevin P.
Micropolis Corporation
Tupper Robert S.
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