| 摘要 |
<p>An apparatus for magnetically recording and repeatedly reproducing electrical signals, for example, for use in the slow-motion or still playback of video signals, includes a pliant record disk mounted, at its center, on a rotatable shaft and having a magnetizable surface that is engaged by an electromagnetic transducer or head extending through a support plate for recording or reproducing signals in at least one annular area or record track. When the shaft is at rest, the pliant disk can lie limply against, and be supported by the support plate. In order to avoid the pickup of dust at each annular record track area of the record disk, the surface of the support plate confronting the record disk is formed with an annular groove or recess which is at least coextensive with each record track area on the record disk so that the latter cannot contact the support plate and pick up dust therefrom in each record track area. Further, when the apparatus is enclosed in a cabinet, air deflectors depend therefrom to near the record disk to create turbulence in any centrifugally induced airflow that might otherwise cause the record disk to deflect away from the support plate, particularly near the periphery of the record disk.</p> |
