Labyrinth puzzle

Claim 1

A variable path labyrinth puzzle comprising first and second labyrinth defining portions which are movable with respect to each other about a common axis, said first and second labyrinth defining portions defining respective first and second facing surfaces, having formed thereon respective non-identical groove patterns, which together define said variable path which is formed of a plurality of sequentially defined, mutually overlapping areas at which the non-identical first and second groove patterns overlap at a plurality of different relative orientations of the first and second portions as the first and second portions are rotated with respect to each other, a labyrinth traversing element located in said variable path and being configured with dimensions such that it can pass only mutually overlapping areas of said non-identical groove patterns, said first and second groove patterns including groove portions which are not entirely circumferentially directed and which are configured to cooperate in displacing said labyrinth traversing element along said variable path in response to relative rotation of said first and second labyrinth defining portions, said first and second groove patterns also including groove portions configured in a curved not-entirely circumferential configuration which produce locking interaction between the labyrinth traversing element and the first and second portions against continued rotation in a given direction, whereby traversal by the labyrinth traversing element of the variable path is effected only by successive relative rotations of the first and second portions in predetermined directions and predetermined steps.