Thomas G Irwin

US Patent:

44126816, Nov 1, 1983

Filed:

Feb 22, 1982

Appl. No.:

6/350725

Inventors:

Thomas J. Irwin - Atlanta GA

International Classification:

A63F 908

US Classification:

273153S

Abstract:

A two dimensional logical toy comprises a frame structure having a slide passage in which a slide plate is slidably mounted and on an apertured surface of which a plurality of parallel grooves are formed together with a single transverse groove, a lift including an elongated pedestal slidably and rotatably mounted within the aperture in said slide plate and provided with a platform on one end in which two sets of parrallel grooves are formed, one set of grooves being normally disposed in alignment with the parallel grooves formed in the slide plate and the other set of grooves being transverse thereto, said lift being movable in said aperture in a direction axially of said pedestal and being rotatable so as to cause the second set of grooves in the lift platform to become aligned with the parallel grooves formed in the slide plate, and a plurality of unitary elements slidably mounted in the grooves formed in the guide plate and in the platform so as to form a wide variety of geometric patterns.

US Patent:

47813806, Nov 1, 1988

Filed:

Oct 28, 1987

Appl. No.:

7/114645

Inventors:

Thomas J. Irwin - Atlanta GA

International Classification:

A63F 908

US Classification:

273153S

Abstract:

A multi-component puzzle comprised of ring-forming components which are rotatable about selected orthogonally related axes to move individual components into various relationships. The components are co-acting and constrained to move about each other without the need for a central framework. The absence of a central framework permits a variety of puzzle forms, including intersecting rings, lattices, cubes and combinations of these forms.