Amusement devices: games – Puzzles – Take-aparts and put-togethers
Patent
1996-01-23
1997-08-26
Grieb, William H.
Amusement devices: games
Puzzles
Take-aparts and put-togethers
434211, A63F 912, G09B 2304
Patent
active
056603878
ABSTRACT:
A set of polyhedrons have shapes capable of fitting together, in one or more ways, into a solid geometric shape such as a rectangular solid or more specifically, a cube. The polyhedrons include five-sided polyhedrons made up of a regular tetrahedron and an irregular tetrahedron abutted together as one solid; alternately, the two separate tetrahedra can be included in lieu of one or more of the five-sided polyhedrons, for assembly in the puzzle. The set of polyhedrons includes separate irregular tetrahedra and may include a regular octahedron. Preferably each shape of polyhedron is in a different color. In a preferred embodiment, the polyhedrons are all solid throughout and are of the same density, and that density is preferably the same density as water to enable the teaching of certain relationships. The set of polyhedrons function not only as a puzzle, for fitting into a transparent housing such as a cube, but also for educational purposes in teaching geometry.
REFERENCES:
patent: 176735 (1876-05-01), Bradbury
patent: 3204343 (1965-09-01), Pollock
patent: 3645535 (1972-02-01), Randolph
patent: 4258479 (1981-03-01), Roane
Welch Scientific Co. Catalog, p. 939, Item No. 7589, Oct. 1965.
Freiburger Thomas M.
Grieb William H.
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