| 摘要 |
920,729. Magnetic disc record apparatus. SPERRY RAND CORPORATION. Sept. 25, 1961 [Oct. 3, 1960], No. 34251/61. Class 40 (2). In a data processing and storage system magnetic disc records are mounted on bi - stable belleville spring hubs or on spring spokes, which allow each disc two operative positions. The discs may be separated at any point for the insertion of a movable transducer 18 by a movable fluid jet 17. |
