Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1987-06-15
1988-11-22
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
G11B 555
Patent
active
047870010
ABSTRACT:
A magnetic disc apparatus including a magnetic recording disc having at least two tracks formed thereon and a magnetic head assembly comprising a rotary shaft, an actuator arm connected to said rotary shaft, suspension arms mounted on the actuator arm and magnetic heads, each of which is mounted on one end of a corresponding suspension arm for magnetic recording and reproducing on the disc, the suspension arms being mounted on one end of the actuator arm in the longitudinal direction thereof, and the mounting distance and angle of one of the suspension arms relative to the other are determined on the basis of the thermal coefficient of the material of the disc, and the thermal coefficient of the material and the length of the actuator arm and the suspension arms, whereby the distance between the head and that between the tracks vary at substantially the same rate as a function of changes in temperature, so that no positional separation of the heads with respect to the tracks occurs. Thus, the materials of the disc, the actuator arm and the suspension arms are freely selected, resulting in a low cost magnetic disc apparatus having high reliability.
REFERENCES:
patent: 4307425 (1981-12-01), Kaneko et al.
patent: 4544973 (1985-10-01), DeBull
patent: 4686595 (1987-08-01), Bryer
"M2361A Mini-Disk Drives", CE Manual, Fujitsu Limited, 6/85.
Heinz A. J.
Mitsubishi Denki & Kabushiki Kaisha
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