Tetrahedral gaming die with recessed pyramidal faces

Details Tetrahedral gaming die with recessed pyramidal faces Tetrahedral gaming die with recessed pyramidal faces

1981-07-06

1982-08-24

Pinkham, Richard C.

Amusement devices: games

Chance devices

Dice

52DIG10, 434403, A63F 904

Patent

active

043457614

ABSTRACT:
A new gaming die is an equilateral tetrahedron with each of its four sides in the form of a recessed triangular pyramid. The resulting twelve congruent triangular facets of the novel die may carry numerals, letters or other characters depending on the game for which the die or dice are designed. A unique feature of the tetrahedral die is that it can be cheaply produced by the injection molding of a thermoplastic.

REFERENCES:
patent: D138150 (1944-06-01), Davidson
patent: D191263 (1961-09-01), Kingsbury
patent: D206635 (1967-01-01), Walter
patent: 2151066 (1939-03-01), Anderson
patent: 3276017 (1966-09-01), Mullin
patent: 3608906 (1971-09-01), Odier
patent: 3626604 (1971-12-01), Pierce
patent: 3841039 (1974-10-01), Farnsworth
Mathematical Models, by Cundy and Rollett, Second Edition, .COPYRGT.Oxford University Press, 1961, p. 194.
Polyhedron Models, by Magnus J. Wenninger, .COPYRGT.Cambridge University Press, 1970.

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