Self-reversing symmetrical body

Details Self-reversing symmetrical body Self-reversing symmetrical body

1991-06-10

1992-08-11

Yu, Mickey

Amusement devices: toys

Rotating or having visible rotating portion

Top

434300, A63H 100

Patent

active

051374870

ABSTRACT:
Disclosed is a self-reversing pendular-top formed as a symmetrical solid body of hard rigid material such as acrylic, the configuration being such that the center of gravity is oscillated relative to the geometric center of the pendular-top. The center of gravity may be further displaced from the geometric center by increasing the frequency with the symmetrical addition of counterweights at each end of the device. When rotated counter-clockwise on a smooth surface, the pendular-top will eventually stop rotating, and thereafter, without further input of energy will start to rotate in the reverse direction (clockwise). Similarly, when the pendular-top is oscillated end-to-end or side-to-side, the oscillations will eventually be converted, without further input of energy, into a rotational spin about the vertical axis, which is clockwise and counter-clockwise respectively.

REFERENCES:
patent: 3594944 (1971-07-01), Rondeau
patent: 4076252 (1978-02-01), Bernier et al.

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