Phase controlled shuttering system

Details Phase controlled shuttering system Phase controlled shuttering system

1978-05-05

1979-10-16

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358215, 358225, H04N 526

Patent

active

041715292

ABSTRACT:
A shuttering servo system which is phase synchronized to the vertical rete time of a television camera. Circuitry is provided to lock the leading edge of the signal from a photo detector on a disc shutter motor shaft to the leading edge of the camera's vertical drive output. A form of tachometer feedback is used to stabilize the circuit.

REFERENCES:
patent: 2774815 (1956-12-01), Gillette
Instar Sales Brochure- Video Logic Corp., Oct. 1977.

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