Measuring and testing – Center of gravity; turning moment; metacentric height
Patent
1987-09-09
1989-08-29
Myracle, Jerry W.
Measuring and testing
Center of gravity; turning moment; metacentric height
G01M 112
Patent
active
048605786
ABSTRACT:
This invention is a method for determining 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 semi-floating means in which a spherical ball is placed into a spherical cup and the ball and the cup are immersed in a liquid in which the ball does not float.
If, by suitable means, the liquid is made to vibrate at a certain frequency rate and at a certain power level, the ball will be made to float even though total flotation effort is not present. Continuing the ball at these conditions for a suitable period of time, the heavy portion of the ball will rotate by gravity to the bottom-most position and the desired axis is thereby vertical and thereby determined.
REFERENCES:
patent: 3136151 (1964-06-01), Arneson
patent: 4111038 (1978-09-01), Olson et al.
patent: 4691725 (1987-09-01), Parisi
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