Tracking arrangement

Details Tracking arrangement Tracking arrangement

1974-04-01

1976-03-23

Canney, Vincent P.

Telegraphy

Systems

Printing

178DIG29, G11B 700, H04N 586, H04N 124

Patent

active

039461661

ABSTRACT:
Correction is provided for errors in radial tracking and timing in a video disc playback system of the optical type. A large ring magnet, and a smaller ring magnet carrying a mirror on one face, are coaxially aligned with the smaller magnet supported on a universal pivot and held against its support by a magnetic field. Two pairs of electromagnets, responsive to error or correction signals, cause controlled tilting of the smaller magnet about two orthogonally related axes to maintain tracking registration of a reading beam with a video disc.

REFERENCES:
patent: 2364908 (1944-12-01), Miller
patent: 3011124 (1961-11-01), Hermann et al.
patent: 3071036 (1963-01-01), McKnight et al.
patent: 3381086 (1968-04-01), De Moss et al.
patent: 3449587 (1969-06-01), Barnes
patent: 3470320 (1969-09-01), Pike et al.
patent: 3530258 (1970-09-01), Gregg et al.
patent: 3544221 (1970-12-01), Putnam

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