Apparatus for measuring the angular displacement of two objects

Details Apparatus for measuring the angular displacement of two objects Apparatus for measuring the angular displacement of two objects

1983-02-17

1985-01-29

Haroian, Harry N.

Geometrical instruments

Miscellaneous

Light direction

33 1L, 33 1PT, G01B 1126

Patent

active

044957009

ABSTRACT:
An apparatus for measuring the angular displacement of two objects relative to each other. The apparatus includes a graduated plate which is attached to a rotatable shaft which is rigidly secured to a first object to be measured. The annular displacement of the graduated plate is measured by a scanning unit. The scanning unit and graduated plate are enclosed within a housing which is rigidly secured to a second object. The scanning unit is supported upon the rotatable shaft and secured by a coupling system to the housing so that it will not rotate with the shaft. The coupling system allows translational movements of the scanning unit with respect to the housing in planes perpendicular to the axis of the shaft without impairing the measurement accuracy of the scanning unit.

REFERENCES:
patent: 2465497 (1949-03-01), Turrettini
patent: 4075478 (1978-02-01), Walker
patent: 4386270 (1983-05-01), Ezekiel

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