Geometrical instruments – Straight-line light ray type – Combined
Patent
1980-12-29
1983-07-19
Martin, Jr., William D.
Geometrical instruments
Straight-line light ray type
Combined
33236, 33318, 89 41EA, 356149, 356248, G01C 1514
Patent
active
043935974
ABSTRACT:
A stabilized sighting device for use on a carrier comprises an outer unit mounted for rotation about a bearing axis which may be parallel to the yaw axis of the carrier. An intermediate unit is mounted for rotation on the outer unit about an elevation axis and a sight unit provided with a gyro is mounted on the intermediate unit for rotation within a predetermined angular range about an inner axis located in a plane perpendicular to the elevation axis. First and second motors are provided for driving the intermediate unit and the sight unit about the intermediate and inner axes, respectively and are controlled by first and second servo loop circuits receiving signals from the gyroscope. A detector delivers a signal representative of the deviation of the inner unit from the canonical position and a position reproducing loop controlled by the detector actuates a motor driving the outer unit. The configuration of the outer gimbal is preferably reversed for decreasing the perturbating torques.
REFERENCES:
patent: 2684007 (1954-07-01), Newell
patent: 3471931 (1969-10-01), Bezu
patent: 3518016 (1970-06-01), Burdin et al.
patent: 4015905 (1977-04-01), Lloyd
patent: 4062126 (1977-12-01), O'Hara et al.
Jacquard Paul
Picard Jean-Francois
Martin, Jr. William D.
Societe d'Applications Generales
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