Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1979-01-12
1980-11-25
Rubinson, Gene Z.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
318640, 360 77, 250202, G05B 1933
Patent
active
042361052
ABSTRACT:
A digital servo system for maintaining a detection device, such as a light beam, centered as closely as possible over an information track, such as an optical track on a video recording disc. The servo system includes circuitry for detecting when the light beam traverses a switching line, which, in the illustrative embodiment, is the track centerline, for applying a constant-magnitude acceleration force to deflect the beam to a corrected position, and for reversing the polarity of the acceleration force when the beam traverses the switching line.
REFERENCES:
patent: 3994016 (1976-11-01), Moghadam
patent: 4037252 (1977-07-01), Janssen
patent: 4063287 (1977-12-01), Van Rosmalen
patent: 4138741 (1979-02-01), Hedlund et al.
patent: 4160270 (1979-07-01), Goldschmidt et al.
Clark Ronald J.
Indyk Eugene S.
MCA Discovision Inc.
Rubinson Gene Z.
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