Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1987-05-27
1989-04-18
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
369220, G11B 555, G11B 2108
Patent
active
048232190
ABSTRACT:
A carriage assembly for a disc operating apparatus comprising a frame, a carriage movably supported in the frame relative to the disc, an optical lens or magnetic head mounted on the carriage for recording and reproducing information on the disc, and a radial guide arrangement permitting movement of the carriage in a radial direction relative to the disc. The assembly also comprises a radial drive arrangement including an electromagnetic coil mounted to the carriage and a permanent magnet mounted to the frame. The permanent magnet is electromagnetically coupled with the electromagnetic coil for driving the carriage in the radial direction of the disc. The electromagnetic coil includes two sections which sandwich the carriage and are shaped to come into contact with each other at both sides thereof, whereby the cross section of the electromagnetic coil is hexagonal in a plane parallel to a surface of the disc. As a result, the dimensions in the radial direction of the carriage assembly are decreased.
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patent: 4740946 (1988-04-01), Yumura et al.
Funai Kiyosi
Ueda Takaharu
Yamamoto Tetsu
Yumura Takashi
Hecker Stuart N.
Mitsubishi Denki & Kabushiki Kaisha
Severin David J.
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