Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1982-05-10
1984-06-26
Stellar, George G.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
310 12, 318135, 318594, 318596, 318601, 318652, 318662, 318671, 318687, 335234, 360 77, 360106, G11B 2108, G11B 2110, G05B 1100, H02K 4100
Patent
active
044569343
ABSTRACT:
A linear servo system including a linear motor with a moving permanent magnet the flux of which interacts with current flow through a stator winding. A position servo loop controls the position of the permanent magnet and preferably includes a position transducer located within the motor air gap. The servo system when used in combination with a disk drive preferably includes a coarse/fine positioning program to first move to the desired disk track area and to then move to the center of the disk track. The motor winding located in the air gap can be made of iron or copper clad iron to reduce the size of the effective air gap.
REFERENCES:
patent: 1226697 (1917-05-01), Rinsche
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patent: 3268841 (1966-08-01), Wakshull et al.
patent: 4259602 (1981-03-01), Kuribayashi et al.
patent: 4260914 (1981-04-01), Hertrich
The Farrand High Gain Inductosyn.RTM. Transducer Pamphlet T-HGI-29.
Farrand Controls, Division of Farrand Industries, Inc., 99 Wall Street, Valhalla, NY 10595.
Bourque Joseph A.
Wedman Leonard N.
Kollmorgen Technologies Corporation
Stellar George G.
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