Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1987-05-26
1989-08-29
McElheny, Jr., Donald
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
369220, G11B 7095
Patent
active
048624411
ABSTRACT:
A carriage assembly for use with an optical recording disc for optical recording and reproduction relative to the disc comprises a frame, an optical lens for projecting and receiving a light beam for the optical recording and reproduction, a carriage movably supported in the frame for supporting the optical lens relative to the disc, a vertical guide arrangement for permitting a movement of the optical lens relative to the carriage in a vertical direction relative the disc surface, a vertical drive arrangement for driving the optical lens in the vertical direction relative to the carriage, a radial guide arrangement for permitting said carriage to move in a radial direction of said optical disc, and a radial drive arrangement for driving the carriage in the radial direction of the disc. The vertical drive arrangement includes a permanent magnet and an electromagnetic coil electromagnetically coupled with the permanent magnet, one of the permanent magnet and the electromagnetic coil being mounted to the optical lens and the other of them being mounted to the frame, whereby the carriage assembly is reduced in both weight and physical dimensions.
REFERENCES:
patent: 4321701 (1982-03-01), Arquie et al.
patent: 4414657 (1983-11-01), Arquie et al.
patent: 4443721 (1984-04-01), Jansen
patent: 4545046 (1985-10-01), Jansen et al.
patent: 4583212 (1986-04-01), Koide et al.
Yamamoto Tetsu
Yumura Takashi
McElheny Jr. Donald
Mitsubishi Denki & Kabushiki Kaisha
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