| 摘要 |
842,850. Magnetic recording and reproducing apparatus. STANDARD TELEPHONES & CABLES Ltd. March 26, 1959 [March 29, 1958], No. 10591/59. Class 40 (2). In a magnetic record apparatus in which a transducer 1 scans a sheet record in the form of a card 5, the transducer is moved in alternate directions by a spindle 3 having right-handed and left-handed threads which join each other at the ends and run back into each other. |
