Game of skill to make pendulums rotate round rod - has weights on cords defining sections of cone centred on handle

摘要

The game of skill has a rod (2) with a handle (3) on one end and pendulums (4,5,6) hanging from the other end. The object of the game is to make the pendulums rotate simultaneously in parallel planes, at right angles to the handle. The trajectories of the pendulums are cross sections of a cone which is centered on the handle and the half angle at its top (a) is greater than or equal to 45 degrees. The pendulums are heavy balls (7,8,9) at the end of cords (10,11,12) whose other extremities are joined to rings (13,14,15) that rotate on the rod.