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US 3,945,645 AGranted
Tangential spheres geometric puzzle
OwnerPatrick A. Robertsinventor
Life of this patent
Estimating the term…
Abstract
A tangential spheres geometric puzzle uniquely formed from nine assembly pieces, of which eight pieces are based upon a triangular sphere array and a ninth piece based upon spheres disposed in a square array, providing a challenging educational and manipulative game. The pieces are assemblable into a tetrahedral pyramid.
Claims8
A geometric puzzle of tangential spheres for array in a tetrahedral pyramid comprising
- a plurality of discrete and geometrically different assembly pieces for assembling said puzzle,
- each said piece including at least three tangentially affixed spheres in non-linear array,
- wherein further all said pieces but one of said pieces include identical triangular arrays of three spheres, and
- wherein selected ones of said triangular array pieces include a further sphere tangentially affixed to one of said triangular spheres in respectively different positions out of the plane of said triangular array,
- said plurality of pieces when arranged in a predetermined order defining said tetrahedral pyramid with all face portions and internal areas thereof of the size of said spheres occupied thereby.
2 more elements
Dependencies are inferred from the claim text.