Disk storage apparatus having an electrically tuned head-carriag

Details Disk storage apparatus having an electrically tuned head-carriag Disk storage apparatus having an electrically tuned head-carriag

1978-11-22

1980-06-17

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360104, G11B 552

Patent

active

042086850

ABSTRACT:
In a signal storage apparatus employing a rotating record disk, the resonant frequency of a head carriage assembly is tuned to the rotational speed of the record disk. The head carriage assembly, in following a record track on the record disk, has to accommodate record disk rotational perturbations; i.e., run out, eccentric mounting, etc. Such variations are better accommodated in the head carriage assembly by electrically tuning the head carriage assembly to the rotation of the record disk. In a voice coil head assembly actuator, a pair of opposing coils carry equal current amplitudes. These equal current amplitudes are adjusted to rotational speed of the record disk to thereby continuously tune the head carriage assembly to the record disk rotation.

REFERENCES:
patent: 2776560 (1975-01-01), Erath et al.
patent: 3884316 (1975-05-01), Bowers
patent: 3924268 (1975-12-01), McIntosh
patent: 4113265 (1978-09-01), Iyeta
patent: 4121837 (1978-10-01), Tominari et al.

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