Foldable cube forming geometric device

Details Foldable cube forming geometric device Foldable cube forming geometric device

1976-10-07

1977-12-20

Grieb, William H.

Undertaking

46 1L, A63B 900

Patent

active

040637255

ABSTRACT:
A changeable-configuration geometric device including four right tetrahedrons hinged together with an equilateral tetrahedron in such a manner that the various tetrahedrons may be swung relative to one another to form an infinite number of different overall configurations for the device. One configuration which is producible is that of an equilateral cube, in which configuration the equilateral tetrahedron forms the central core of the cube.

REFERENCES:
patent: 1997022 (1935-04-01), Stalker
patent: 3632109 (1972-01-01), Dattner
patent: 3659360 (1972-05-01), Zeischegg
patent: 3749636 (1973-07-01), Tranquillitsky
patent: 3899838 (1975-08-01), Lalley et al.

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