Pivoting radial access mechanism with spinning support shaft

Details Pivoting radial access mechanism with spinning support shaft Pivoting radial access mechanism with spinning support shaft

1988-07-28

1990-01-09

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

G11B 2108

Patent

active

048932060

ABSTRACT:
Apparatus for controlling the radial position of a transducer (e.g. an optical, magneto-optic, or magnetic write/read head) relative to a spinning disk (e.g. a data storage disk) comprises a transducer-supporting radial access arm which is mounted via a rotary bearing for pivotal movement about a spinning support shaft. The continuous rotary movement of the support shaft dramatically reduces stick-slip friction in the bearings separating the support shaft and the access arm, thereby reducing start-up torque and enabling more precise positioning of the transducer relative to the disk. Moreover, it prolongs the life of the rotary bearing in that it eliminates so-called Brinelling (wearing of the bearing balls or rollers due to small oscillations about the same point).

REFERENCES:
patent: 4682255 (1987-07-01), Sleger et al.
patent: 4805055 (1989-02-01), Wright
Johnson et al., "Small Modular/Linear Voice Coil Actuator", IBM TDB, vol. 21, No. 11, Apr. 1979, 4632-3.

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