Instrument for the indication or checking of the angular positio

Details Instrument for the indication or checking of the angular positio Instrument for the indication or checking of the angular positio

1974-11-13

1976-03-23

Martin, Jr., William D.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33 1N, 33348, 33391, 356169, G01C 912

Patent

active

039451291

ABSTRACT:
An instrument for indicating or checking the angular position of an object. A movable part is mounted on a stationary part; said parts have a pattern of equally wide parallel lines separated by interspaces. When the parts overlap in use of the instrument the line patterns form a moire pattern to indicate the angular position of the object.

REFERENCES:
patent: 1359474 (1920-11-01), Wernick
patent: 3145250 (1964-08-01), Vargady
patent: 3166624 (1965-01-01), Vargady
patent: 3192641 (1965-07-01), Jones

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