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    2.
    发明专利
    未知

    公开(公告)号：DE2705125A1

    公开(公告)日：1978-08-17

    申请号：DE2705125

    申请日：1977-02-08

    Applicant: BASF AG

    Inventor： MANZKE KLAUS ,  BROTZLER ROLAND DIPL ING ,  BERG GERHARD DIPL ING ,  UHL KARL DR

    IPC: G11B5/55 ,  G11B5/54

    Abstract: A positioning device for a write/read magnetic head in a magnetic disc data storage device comprising a motor-driven guide disc, with a spiral-shaped guide wall arranged at right angles to the plane of the guide disc, for a guide element in the form of a ball-bearing on a magnetic-head support. Due to the greatly reduced friction it is possible to achieve highly accurate positioning within an extremely brief period of time and with an extremely low power requirement. This device may be used to position the heads in magnetic disc systems for the recording and/or reproduction of analog or digital signals.

    3.
    发明专利
    未知

    公开(公告)号：DE2846599A1

    公开(公告)日：1980-04-30

    申请号：DE2846599

    申请日：1978-10-26

    Applicant: BASF AG

    Inventor： MANZKE KLAUS ,  BROTZLER ROLAND DIPL ING

    IPC: G01B7/00 ,  G11B5/55 ,  G11B21/02 ,  G11B21/08 ,  H02K41/02 ,  H02K41/035 ,  H02K33/00

    Abstract: A device for positioning objects of low mass, particularly magnetic heads over preselected tracks on at least one magnetic disc in a disc file in which there is provided a carriage, displaceable toward and away from the axis of rotation of the magnetic disc, which serves as carrier not only for the magnetic heads but also for the coil of a linear drive means, the said coil being a flat coil which projects into the working air gap of a magnet assembly comprising at least one flat magnet, the flat coil and magnet assembly being arranged in such a way that the force vector lies essentially in the plane in which the carriage is displaceably mounted.

    4.
    发明专利
    未知

    公开(公告)号：DE2716848A1

    公开(公告)日：1978-10-26

    申请号：DE2716848

    申请日：1977-04-16

    Applicant: BASF AG

    Inventor： MANZKE KLAUS ,  BROTZLER ROLAND DIPL ING ,  BERG GERHARD DIPL ING ,  UHL KARL DIPL ING DR

    IPC: G11B17/032 ,  G11B17/028 ,  G11B17/035 ,  G11B17/04 ,  G11B19/20

    Abstract: A drive apparatus for a magnetic disc, particularly a flexible magnetic disc in an envelope, distinguished by a compact design which is achieved by so designing and arranging the linkage between the drive's closure member and disc clamping member that they take up as little room as possible. By designing the linkage in the form of a roller and lever arrangement and arranging them substantially on the central longitudinal axis of the housing of the drive apparatus in the upper portion of the housing, the maximum amount of space is available on either side of the linking means for printed circuit boards and electronic components. In a very advantageous embodiment, the closure member, linkage and clamping member and part of the housing are assembled as a single unit which is ready for fitting. The drive apparatus of the invention can be used for any kind of flexible or rigid magnetic disc.

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