Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1985-07-09
1986-12-16
Faber, Alan
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 44, 369111, 365234, 360 722, G11B 2710, G11B 2110
Patent
active
046302506
ABSTRACT:
In a video and/or audio disc information recording and reproducing apparatus including a coarse tracking control means, to coarsely vary the positions of the turntable and the pickup means relative to each other in a radial direction of the disc on the turntable, is driven to move in a direction and over a distance to lessen the difference between the address picked up and the address to be searched and at a speed varying with the absolute value of the difference between such addresses and decreasing at a deceleration rate which increases as absolute value decreases within a predetermined range. The apparatus includes a fine tracking control means to minutely vary the relative positions of the turntable and the pickup means. The fine tracking control is made operative when the absolute value is reduced to the lower limit of the above mentioned predetermined range and the coarse tracking control means is made inoperative.
REFERENCES:
patent: 3851116 (1974-11-01), Cannon
patent: 4106058 (1978-08-01), Romeas
patent: 4199820 (1980-04-01), Ohtake et al.
patent: 4323997 (1982-04-01), Kuribayashi et al.
patent: 4330880 (1982-05-01), Van Dijk
patent: 4375091 (1983-02-01), Dakin
patent: 4555736 (1985-11-01), Mathieu
Faber Alan
Pioneer Video Corporation
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