Apparatus for determining the center of gravity of a spherical b

Details Apparatus for determining the center of gravity of a spherical b Apparatus for determining the center of gravity of a spherical b

1988-02-29

1990-05-29

Ruehl, Charles A.

Measuring and testing

Center of gravity; turning moment; metacentric height

G01M 112

Patent

active

049285165

ABSTRACT:
This invention is an apparatus for determining and marking an axis of an unbalanced spherical ball which axis contains its geometric center as well as its center of gravity. This axis is determined by using "contained floating" apparatus wherein a ball to be tested is placed in a closely fitted and especially designed cup and the cup containing the ball to be tested is placed in a container of a suitable liquid in which the ball floats. One example would be an ordinary golf ball placed in a closely fitted, especially designed cup and the cup containing the golf ball is lowered into an open container filled to a suitable level with FREON 113. In a relatively short period of time, heavy portions of the ball to be tested will rotate by gravity to its bottom-most position and, hence, the desired axis is vertical and thereby determined and can be marked by any convenient marking method.

REFERENCES:
patent: 1250888 (1917-12-01), Johnson
patent: 4111038 (1978-09-01), Olson et al.
patent: 4546644 (1985-10-01), Beny et al.
"Manufacture of Bowling Balls at Stowe-Woodward", Rubber Age, Aug. 1954, pp. 688-689.
Carl Soto, "Aid for Putting Has Some Merit", The Arizona Republic, Oct. 31, 1976.
Johnny Janes, "Tee to Green", The San Antonio Light, Nov. 21, 1976.
Ray Crawford, "Tomlinson Defending Title", Miami Herald.

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