| 摘要 |
<p>The spindle of a turntable body comprises a top member having a projection to be fitted in a center hole of a phonograph record, and a generally cylindrical spindle body partially received in a cylindrical bearing. The top member has a turntable mount, whose outer diameter is greater than the projection, and a plurality of a radial passageways are made therein, which passageways communicate with a vacuum source. The lower end of the spindle body, which is made of two elements of different material so that machining is easy, is closed in one embodiment so as to be supported on a relatively small ball bearing. A spindle body having an open end is used in another embodiment. The ball bearing may be replaced with a pointed end of the spindle body. Means for tightening the air seal around a lubricant in the cylindrical bearing is provided for isolating the lubricant from the moving air lead to the vacuum source. A turntable sheet for attracting differently sized records to the turntable is provided with radial and circular grooves on both sides, and may be placed on the turntable body.</p> |
