Patents by Inventor Volker W. Zimmermann

Volker W. Zimmermann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Disk storage apparatus having an electrically tuned head-carriage actuator
    Patent number: 4208685
    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.
    Type: Grant
    Filed: November 22, 1978
    Date of Patent: June 17, 1980
    Assignee: International Business Machines Corporation
    Inventors: Arno Matla, Horst D. Matthaei, Volker W. Zimmermann