公开(公告)号：US4464689A

公开(公告)日：1984-08-07

申请号：US270419

申请日：1981-06-04

申请人： Franklin M. Propst

发明人： Franklin M. Propst

IPC分类号： G11B17/34 ,  G11B19/20 ,  G11B21/08 ,  G11B15/48

CPC分类号： G11B21/083 ,  G11B17/34 ,  G11B19/20

摘要： A random access read/write unit includes radial and angular positioning systems for accessing one of a plurality of storage locations or positions arranged in a two dimensional coordinate system on a storage medium such as a magnetic disc. The radial positioning system includes coarse and fine positioning devices for accurately locating a read/write mechanism or "head" at one of a plurality of concentric tracks located on the magnetic disc. The coarse positioning device includes a plurality of sensors which provide information denoting the position of the read/write head relative to the desired track. The fine positioning device is engaged once the coarse positioning device has located the head at approximately the desired track, and includes means for finally positioning the head accurately with respect to the desired track. An angular positioning system rotates the disc relative to the head, so that the head accesses any one of a plurality of angular sectors disposed about the disc. The random access unit provides a high degree of reliability even after repeated usage, is relatively inexpensive to manufacture, records and plays digital information and/or high quality audio recordings and is quiet in operation.

摘要翻译： 随机访问读/写单元包括用于访问诸如磁盘的存储介质上布置在二维坐标系中的多个存储位置或位置中的一个的径向和角度定位系统。 径向定位系统包括用于在位于磁盘上的多个同心轨道中的一个上精确地定位读/写机构或“头”的粗精细定位装置。 粗定位装置包括多个传感器，其提供表示读/写头相对于期望轨道的位置的信息。 一旦粗定位装置将头部定位在大约期望的轨道上，则精细定位装置被接合，并且包括用于相对于期望轨道精确地定位头部的装置。 角度定位系统相对于头部旋转盘，使得头部访问围绕盘设置的多个角扇区中的任一个。 即使在重复使用之后，随机存取单元提供高度的可靠性，制造相对便宜，记录和播放数字信息和/或高质量的音频记录，并且操作安静。

公开(公告)号：US4124872A

公开(公告)日：1978-11-07

申请号：US860027

申请日：1977-12-12

申请人： Franklin M. Propst

发明人： Franklin M. Propst

IPC分类号： G11B17/00 ,  G11B17/028 ,  G11B19/20 ,  G11B21/08 ,  G11B17/02 ,  G11B5/016 ,  G11B5/55

CPC分类号： G11B21/083 ,  G11B17/005 ,  G11B17/028 ,  G11B19/20

摘要： Record/playback apparatus including low speed and high speed motor-driven apparatus for engaging the rim of a flexible recording disc to rotate the disc. The high speed motor-driven apparatus positions the disc relative to a record/playback head at high speed and the low speed motor-driven apparatus drives the disc during playback.

摘要翻译： 记录/回放装置，包括用于接合柔性记录盘的边缘以旋转盘的低速和高速电动驱动装置。 高速电机驱动装置将盘相对于记录/重放头高速定位，并且低速电动驱动装置在播放期间驱动盘。