Device for indicating the polar coordinate position of a given p

Details Device for indicating the polar coordinate position of a given p Device for indicating the polar coordinate position of a given p

1983-12-19

1985-04-30

Little, Willis

Geometrical instruments

Miscellaneous

Light direction

33 1SD, G01B 300

Patent

active

045135053

ABSTRACT:
A fixed member has angular indicia circumscribing a given area. A first disc is rotatable about an axis at its center and at the center of the angular indicia, and a second disc is rotatably secured to the first disc about an axis parallel to the axis of rotation of the first disc. Bridging lines on the first disc couple a reference point on the second disc to angular scalar indicia on the fixed member to indicate the relative angular position of the reference point with respect to the axis of rotation of the first disc. Radial displacement indicia on the surface of the first and second discs indicate the relative radial displacement of the reference point from the axis of rotation of the first disc along a radial line through that axis.

REFERENCES:
patent: 2264279 (1941-12-01), Dearing
patent: 2350424 (1944-06-01), Smith
patent: 2482105 (1949-09-01), Duggar
patent: 2999635 (1961-09-01), Robertson
patent: 3497678 (1970-02-01), Warner
patent: 4287496 (1981-09-01), Young

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