Amusement devices: games – Surface projectile game; game element – Simulated game
Patent
1986-01-14
1987-05-12
Marlo, George J.
Amusement devices: games
Surface projectile game; game element
Simulated game
273 58K, A63B 6936
Patent
active
046643877
ABSTRACT:
A practice putting device in which a golf ball has two equal and one smaller mutually orthogonal principle mass moments of inertia. The center of mass is in the center of the ball. Weights, such as metal shapes denser than the ball are embedded on diametrically opposite sides of the ball. The center of gravity of each weight and the center of the ball are coincidental with the axis of rotation corresponding to the smallest of the moments of inertia. The product of the square of the distance of the center of gravity of each weight from the center of the ball and the magnitude of each weight (i.e., r.sub.cg.sup.2 .times.W) is between 0.005 and 0.05 in.sup.2 -lb. Thus, the weights will tend to align this axis of rotation perpendicularly to a second axis of rotation if the ball is caused to rotate about the second axis. When the ball is stroked properly with a line through the center of the weights parallel to the putting surface and perpendicular to the intended path of the ball, the ball will roll straight without wobble. When misstroked, the ball will be dynamically unstable and will roll with an increasing wobble. A stripe or line or printing may be provided on the ball for indicating proper alignment.
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patent: 4278254 (1981-07-01), Simjian
patent: 4494757 (1985-01-01), Simjian
Marlo George J.
Schneck Thomas
LandOfFree
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