Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1981-11-24
1986-05-27
Psitos, Aristotelis M.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
350530, 350255, G11B 700
Patent
active
045920370
ABSTRACT:
A device for displacing and supporting a driven member pickup head in all the coordinate axis directions of three coordinate axes perpendicular to one another. The device includes at least one support member formed of viscoelastic material for supporting the driven member on a frame. The support member is tensioned and connected between the driven member and the frame and has one end affixed to the driven member disposed in a plane perpendicular to an arbitrarily selected one coordinate axis of the three coordinate axis directions and the other end affixed to the frame disposed in a plane perpendicular to the one coordinate axis. The pickup actuator also includes a device for generating lines of magnetic force in two directions perpendicular to each other, a first coil and a second coil secured to the driven member and having a first path of current and a second path of current respectively disposed in one direction of the magnetic lines of force and perpendicular to each other in a plane perpendicular to the one direction of the magnetic lines of force, a third coil secured to the driven member and having a third path of current disposed in the other direction of the lines of magnetic force and parallel to one of the first path of current and the second path of current in a plane perpendicular to the other direction of the lines of magnetic force, whereby the pickup holder can be independently driven for movement in three axis directions perpendicular to one another.
REFERENCES:
patent: 3673412 (1972-06-01), Olson
patent: 4011003 (1977-03-01), Dragt
patent: 4302830 (1981-11-01), Hamaoka et al.
patent: 4321701 (1982-03-01), Arquie et al.
patent: 4437177 (1984-03-01), Watabe et al.
Hitachi , Ltd.
Psitos Aristotelis M.
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