Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1996-09-06
1997-09-09
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360105, G11B 2122
Patent
active
056662440
ABSTRACT:
A rotary actuator assembly in a magnetic disk drive unit capable of simultaneously realizing at low costs a reliable lock mechanism for an actuator and the improvement in gap magnetic flux density at both ends in a moving range of the actuator. The rotary actuator assembly includes a base; an actuator arm subassembly rotatably mounted on the base, the subassembly having one end supporting a plurality of magnetic heads and another end supporting a moving coil; and a magnetic circuit fixed to the base, the magnetic circuit constituting a voice coil motor in combination with the moving coil. Further, a latch magnet for locking the actuator arm subassembly is fixed to either the base or the magnetic circuit. The latch magnet has a magnetic pole directed to a center yoke of the magnetic circuit, and the magnetic pole has the same polarity as that of surfaces of an inner magnet and an outer magnet of the magnetic circuit opposed to the center yoke.
REFERENCES:
patent: 4805055 (1989-02-01), Wright
patent: 4947274 (1990-08-01), Casey et al.
patent: 5005095 (1991-04-01), Wagner
patent: 5365389 (1994-11-01), Jabbari et al.
Fujitsu Limited
Tupper Robert S.
Watkins Kevin M.
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