Dynamic information storage or retrieval – Dynamic mechanism subsystem – Having power driven transducer assembly
Patent
1990-10-05
1992-08-11
Levy, Stuart S.
Dynamic information storage or retrieval
Dynamic mechanism subsystem
Having power driven transducer assembly
369219, 369249, 360106, G11B 336, G11B 555, G11B 712
Patent
active
051386054
ABSTRACT:
A low-profile radial access mechanism for controlling the radial position of a read/write head relative to a rotating data storage disk (e.g. optical, magneto-optical and magnetic disks). Such mechanism has a carriage (10) which supports a plurality of bearings (11) on its opposing sides. The bearings engage a pair of space parallel rods (21, 31) to guide the carriage along a rectilinear path. Each rod is made of a ferromagnetic material and forms part of the flux-carrying structure of one of a pair of separate electromagnetic linear motors (20, 30). One of the two flux-carrying structures is movable relative to the other to preload the bearings against the guide rods. According to a preferred embodiment, the pair of linear motors share the windings of a single coil (22) carried by the carriage, such windings being physically distributed as to accommodate an exact constraint arrangement provided by the bearings. Preferably, the bearings and coil are located and configured so that the center of mass of the carriage is located along the line of force exerted on the carriage by the linear motors.
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patent: 4823219 (1989-04-01), Ueda et al.
patent: 4823336 (1989-04-01), Inada et al.
Halter Albert A.
Heppner Paul D.
Shtipelman Boris A.
Eastman Kodak Company
Holloway William W.
Levy Stuart S.
Rhoa Joseph A.
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