Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1988-06-10
1991-04-30
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 57, 360109, 360 7813, G11B 5596
Patent
active
050123629
ABSTRACT:
An apparatus of the invention is capable of shifting a transducer, such as a head for erasing, reproducing and recording information on a track formed on a recording medium, with fine positioning accuracy and high access speed. Further, the apparatus is capable of entirely erasing information to be erased on the medium by shifting the transducer with a desired degree while the transducer is excited for erasing operation. In the apparatus, a motion converting means, such as a disc cam or a helically grooved cylindrical cam, is employed for converting a primary rotating motion to a secondary stepwise motion so as to shift the transducer, presenting substantial dead band characteristics for the shifting motion. Further, a control means is employed for shifting the transducer over an area covering an information recorded track and the portions adjacent thereto to execute the erasing operation for an extended area along the track to be erased.
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Nikkei Electronics, Jul. 2, 1987, pp. 80-85; published by Nikkei McGraw-Hill. Title: Recording 25 Stillpictures on a Floppy Disc of 47 mm in Diameter-Standard of Magnetic Disks for Electronic Still Cameras.
Olympus Optical Co,. Ltd.
Psitos Aristotelis M.
Robertson David L.
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