Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1988-12-09
1991-01-01
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360 9801, G11B 555
Patent
active
049823000
ABSTRACT:
A magnetic disc drive includes a rigid housing, a plurality of data storage discs rotatably mounted in the housing, and a carriage for supporting and placing transducing heads in selected dispositions with respect to the rotating discs. An actuator or voice coil motor drives the carriage, and is fixed in the vertical direction to the housing by three posts extended upwardly of a deck portion of the housing and engaging the bottom of the actuator. A metallic plate mounted integrally to the actuator and a viscoelastic polymeric layer are interposed between the actuator and the deck adjacent the posts. The posts are sufficiently flexible to permit a limited horizontal displacement of the actuator with respect to the housing, responsive to movement of the carriage. The displacement causes shear strain in the viscoelastic layer whereby the layer tends to absorb and dissipate most of the energy of vibration.
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Heinz A. J.
Heller III Edward P.
Magnetic Peripherals Inc.
Niebuhr Frederick W.
Sniezek Andrew L.
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