Dynamic information storage or retrieval – Dynamic mechanism subsystem – Having power driven transducer assembly
Patent
1983-01-03
1985-04-30
Stephan, Steven L.
Dynamic information storage or retrieval
Dynamic mechanism subsystem
Having power driven transducer assembly
369215, 369221, 369254, 360106, G11B 2108, G11B 700, G11B 556
Patent
active
045148376
ABSTRACT:
An apparatus for optically reading and/or recording information on a rotary optical disc (4), such as a video-disc player or an optical recorder, comprises an objective carrier (3) for an objective (2) which is radially moved to and fro over a frame (1) by a drive unit. Driving is effected by means of two electric motors (7) which rotate in opposite directions and which move the objective carrier (3) to and fro and, simultaneously but in an opposite direction, move two balancing masses (11) in paths on each side of the path of movement of the objective carrier, so that during accelerations and decelerations of the to-and-fro movements of the objective carrier no reactive forces or reaction moments are transmitted to the frame.
REFERENCES:
patent: 3749827 (1973-07-01), Kinjo et al.
patent: 3922720 (1975-11-01), Caletti et al.
patent: 3977684 (1976-08-01), Camerik
patent: 4067581 (1978-01-01), Stratton
patent: 4150833 (1979-04-01), Yamamura
patent: 4399477 (1983-08-01), Bryer
patent: 4423447 (1983-12-01), Nishida et al.
patent: 4442516 (1984-04-01), Funabashi
Smith Robert S.
Stephan Steven L.
U.S. Philips Corporation
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