Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1981-03-04
1983-12-27
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360104, G11B 2108
Patent
active
044234465
ABSTRACT:
A magnetic data recording and reading device for a magnetic disk memory device including a spiral cam driven for rotation by a motor, a pivotal arm supporting a magnetic head at one end and a contact member at the other end for contacting the spiral cam, a pressing member for urging the contact member of the pivotal arm to press against the spiral cam, and a pivot for supporting the pivotal arm for pivotal movement. Upon rotation of the motor, the magnetic head at the one end of the pivotal arm is positioned on a magnetic disc to thereby effect magnetic recording and reading of data. The positioning of the magnetic head is effected in such a manner that the spiral cam rotated by the motor has the contact member of the pivotal arm press thereagainst to thereby move the pivotal arm in pivotal movement to permit the magnetic head to search along the magnetic disc.
REFERENCES:
patent: 3124789 (1964-03-01), Wasylenko
patent: 3539191 (1970-11-01), Yamamoto
patent: 4131923 (1978-12-01), Wachs et al.
Nishida Hiroshi
Shiono Toshio
Takahashi Tuyoshi
Hitachi , Ltd.
Wolff John H.
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