Patent ID: 6120022
Filing Date: 2000-09-19
Classification: A63F

Abstract:
A random selector device for use on an overhead projector, to enable selecting a number or symbol randomly while the process of selection is viewed by a group, comprising:an essentially transparent base adapted to rest on a stage of an overhead projector, the base having a threaded through hole,a mounting point comprising a cone point set screw fitted in the threaded through hole with the narrow point of the set screw extending upwardly from an upper surface of the base plate,an essentially transparent spinner member having a central hub, the hub having a bottom recess with an essentially cone-shaped apex at its upper end, the apex being pointed and configured so that when the spinner member is placed down on the base with the hub recess over the mounting point, the mounting point extends into the apex of the hub recess and contacts the hub recess substantially only at said apex, and the hub being positioned substantially at the center of gravity of the spinner member such that the spinner member when rotating does not contact the base except in the hub recess, and the spinner member having a visible, projectable selection indicator, andprojectable field division indicia on a surface of the base, identifying a multiplicity of different field divisions to which the spinner can point,whereby, when the spinner member is rotated over the base, the spinner member spins with little friction, then comes to rest at a random position pointing to one of the field divisions.