Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1993-01-19
1995-07-11
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360107, 360109, G11B 5588, G11B 2110
Patent
active
054326583
ABSTRACT:
In a rotary-magnetic-head dynamic track following device of the present invention, a coil for generating a controlling magnetic field that shifts a magnetic head along its rotation axis, a magnet for generating a constant magnetic field, a yoke section for allowing the constant magnetic field to form a closed loop (for example, an upper yoke and a lower yoke) are installed in a ring shape around the rotation axis. The lower drum also functions as a fixed drum. A head support member, which has spiral grooves formed along its outer edge section, is fixed to the bottom face of the outer circumferential wall of the upper drum. The upper drum and a rotary transformer core section are fixed to a rotary cylinder, and thus rotated together with a motor section and the head support member as one unit. This arrangement makes it possible to achieve compactness of the rotary-magnetic-head dynamic track following device as well as providing superior performances such as: a better response characteristic of the head displacement adjusting mechanism; reduction of slide resistance of the magnetic tape; and reduced power consumption.
REFERENCES:
patent: 4327384 (1982-04-01), Tomita et al.
patent: 5223992 (1993-06-01), Mitsuhashi
Patent Abstracts of Japan vol. 9, No. 83 (P-384) 12 Apr. 1985.
Patent Abstracts of Japan, vol. 12, No. 114 (P-688) 12 Apr. 1985.
Kajita Nobuyuki
Uejima Takamasa
Sharp Kabushiki Kaisha
Tupper Robert S.
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