Diameter gage for rings and round objects

Details Diameter gage for rings and round objects Diameter gage for rings and round objects

1991-01-08

1992-04-14

Haroian, Harry N.

Geometrical instruments

Gauge

Circular size

G01B 310

Patent

active

051035715

ABSTRACT:
A gage apparatus for determining uniformity in the inside or outside diameter of flexible rings and generally round objects based on the ratio of the circumference of a circle to its diameter. A spring biased lever pivotally mounted on a support plate has a releasable clamp at one end. An indicator is engaged with the lever to indicate the amount of pivotal movement thereof. A thin flexible band of stiff material has one end secured to a spool on the support plate and a portion of its length passes slidably through the clamp and forms a circular loop and its terminal end is fixed to the clamp. The ratio of the distance from the pivot point of the lever to the connection with the band is pi (3.1416) times the distance from the pivot point to the connection with the indicator whereby circumferential measurements are converted and indicated as diametric measurements. As the lever pivots, the diameter of the circular looped portion of the band will increase or decrease.

REFERENCES:
patent: 1540378 (1925-06-01), Wasson
patent: 1978682 (1934-10-01), Marvin
patent: 3183601 (1965-05-01), Niles

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