Robert R Cleveland

US Patent:

41610008, Jul 10, 1979

Filed:

Oct 28, 1977

Appl. No.:

5/846433

Inventors:

Robert R. Cleveland - Kansas City MO

Assignee:

Video Systems Research, Inc. - Kansas City MO

International Classification:

H04N 530
H04N 718

US Classification:

358225

Abstract:

A conventional television camera is provided with a motor driven, rotating mechanical shutter assembly having a pair of adjustable, opposing shutter openings, and control circuitry for synchronizing the operation of the shutter assembly with the scanning of the camera's pickup tube to limit image movement on the pickup tube during a field scan in order to permit high clarity picture reproduction of scene objects moving rapidly across the camera's field of view. The control circuitry is adapted to receive any of several types of conventional picture synchronizing signals ordinarily employed in television cameras and conditions these synchronizing signals for use in controlling a pair of motor driving amplifiers whose outputs are coupled to the shutter driving motor for selectively energizing the latter. The speed of the motor is therefore synchronized with the picture synchronizing signals, consequently, the angular position of the shutter openings remains synchronized with the scanning of the camera's pickup tube in spite of variations in the source of synchronizing signals, power line frequency or wear characteristics of the motor. An optical sensing circuit coupled with the shutter assembly functions to produce a tachometer signal indicative of the speed and phase position of the shutter openings and is used as a feedback control signal to automatically provide an initial phase adjustment of the motor in order to bring the operation of the shutter assembly into synchronization with the scanning of the camera's pickup tube.

Address:

11715 NW 76 St, Kansas City, MO 64152

VIN:

5LMFL28527LJ13897

Make:

LINCOLN

Model:

NAVIGATOR L

Year:

2007