Patent US4461480A successfully refreshed from Google Patents.
US4461480A
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Educational entertainment device comprising cubes formed of four 1/8th octahedron sections rotatably coupled to a tetrahedron
Assignee: Individual
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Filing: 1982-09-30
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Granted: 1984-07-24
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Expires: 2002-09-30
Abstract
Abstract An educational entertainment device includes at least one cube formed from (a) a regular tetrahedron and (b) four 1/8th sections of a regular octahedron wherein the faces of the tetrahedron and the faces of the octahedron are all congruent. The 1/8th sections are formed by slicing the octahedron through three orthogonal planes, each slicing plane passing through four vertices of the octahedron, each 1/8th section being defined by (a) one octahedron face and (b) three mutually orthogonal corner faces. By coupling the octahedron face of each of the four 1/8th sections to a corresponding one of the tetrahedron faces in edge-to-edge fashion, one cube is formed. Each side of the cube includes two corner faces, one from each of two 1/8th sections. By rotating a 1/8th section about an axis perpendicular to the plane interfacing the 1/8th section and the tetrahedron, the two corner faces forming a cube side can be altered. A plurality of n 3 , e.g. eight, cubes can form a block of cubes, in an n×n×n arrangement of cubes. Indicia may be applied to the corner faces of the cubes so that each face of the block has prescribed indicia thereon when (a) all of the 1/8th sections on each cube are rotated in a prescribed fashion and (b) the cubes are arranged relative to each other in a predefined manner. The block, in addition to entertainment use, can be used to show seven planes in space and the nature of the tetrahedron and octahedron as basic structures.
Inventors
- 👤 Maurice E. Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:06
CPC Classifications
A; A63; A63F; A63F9/00; A63F9/06; A63F9/08; A63F9/0826; A63F9/0838; A63F2250/00; A63F2250/60; A63F2250/606
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
163 words
A method for making an educational puzzle comprising the step of producing at least one cube, wherein the producing of each cube includes the steps of: forming four equal 1/8th sections of a regular octahedron, the forming step comprising the step of extracting four 1/8th sections from a regular octahedron sliced through three orthogonal planes, where each plane passes through four vertices of the octahedron, each 1/8th section thereby having (a) one octahedron face and (b) three corner faces each of which lies along a corresponding one of the orthogonal planes; and rotatably coupling the octahedron face of each of the four formed 1/8th sections to a corresponding face of a regular tetrahedron, wherein (a) each octahedron face of a respective 1/8th section is dimensionally congruent with the corresponding face of the regular tetrahedron, and (b) each octahedron face rotates relative to the corresponding tetrahedron face about an axis at least substantially perpendicular to said each octahedron face and said corresponding tetrahedron face.
Claim 2
Independent Claim
163 words
A method for making an educational puzzle comprising the step of producing at least one cube, wherein the producing of each cube includes the steps of: forming four equal 1/8th sections of a regular octahedron, the forming step comprising the step of extracting four 1/8th sections from a regular octahedron sliced through three orthogonal planes, where each plane passes through four vertices of the octahedron, each 1/8th section thereby having (a) one octahedron face and (b) three corner faces each of which lies along a corresponding one of the orthogonal planes; and rotatably coupling the octahedron face of each of the four formed 1/8th sections to a corresponding face of a regular tetrahedron, wherein (a) each octahedron face of a respective 1/8th section is dimensionally congruent with the corresponding face of the regular tetrahedron, and (b) each octahedron face rotates relative to the corresponding tetrahedron face about an axis at least substantially perpendicular to said each octahedron face and said corresponding tetrahedron face.
Claim 3
Dependent Claim
40 words
A method according to claim 1 wherein the coupling step comprises the step of: extending a respective pivot pin perpendicularly outward from the center of each tetrahedron face and perpendicularly into the octahedron face corresponding to said each tetrahedron face.
Claim 4
Dependent Claim
20 words
A method according to claim 1 wherein the cube-making step comprises the additional step of: forming eight of said cubes.
Claim 5
Dependent Claim
66 words
A method according to claim 3 comprising the further step of: applying selected indicia to each corner face of each 1/8th section of each said cube in a manner such that the cubes, only when each 1/8th section is rotated to a unique prescribed position, can be stacked to form a unique 2×2>2 block in which each face of the block has a prescribed indicia thereon.
Claim 6
Dependent Claim
86 words
A method according to claim 3 comprising the further step of: applying selected indicia to each corner face of each 1/8th section of each said cube in a manner such that the cubes, only when each 1/8th section is rotated in a unique prescribed position, can be stacked to form a unique 2×2×2 block in which each face of the block has a uniform indicia thereon, the uniform indicia on each side of the block differing from the uniform indicia on at least one other side.
Claim 7
Dependent Claim
60 words
A method according to claim 4 wherein the applying step comprises the steps of: configuring said eight cubes into a 2×2×2 block; selecting a distinct prescribed indicia pattern for each face of the block; and identifying each corner face on a respective face of the block with the indicia required for providing the prescribed indicia pattern for the respective face.
Claim 8
Dependent Claim
60 words
A method according to claim 5 wherein the applying step comprises the steps of: configuring said eight cubes into a 2×2×2 block; selecting a distinct prescribed indicia pattern for each face of the block; and identifying each corner face on a respective face of the block with the indicia required for providing the prescribed indicia pattern for the respective face.
Claim 9
Dependent Claim
29 words
A method according to claim 6 wherein the indicia pattern selecting step includes the step of: defining each prescribed indicia pattern as a uniform pattern on each block face.
Claim 10
Dependent Claim
106 words
An educational device comprising: at least one cube which comprises: a regular tetrahedron; four 1/8th sections of a regular octahedron, wherein the faces of the octahedron are congruent with the faces of the tetrahedron and wherein each section comprises (a) one of the octahedron faces and (b) three orthogonal corner faces formed by slicing the octahedron by three orthogonal planes each plane of which passes through four octahedron vertices, each corner face lying along one of the orthogonal planes; and means for rotatably coupling the octahedron face of each of the four 1/8th sections to a corresponding one of the tetrahedron faces in a face-to-face relationship.
Claim 11
Dependent Claim
106 words
An educational device comprising: at least one cube which comprises: a regular tetrahedron; four 1/8th sections of a regular octahedron, wherein the faces of the octahedron are congruent with the faces of the tetrahedron and wherein each section comprises (a) one of the octahedron faces and (b) three orthogonal corner faces formed by slicing the octahedron by three orthogonal planes each plane of which passes through four octahedron vertices, each corner face lying along one of the orthogonal planes; and means for rotatably coupling the octahedron face of each of the four 1/8th sections to a corresponding one of the tetrahedron faces in a face-to-face relationship.
Claim 12
Dependent Claim
49 words
A device according to claim 9 further comprising eight of said cubes arrangeable into a 2×2×2 block of cubes, and wherein the four cubes along each of the six faces of the block are rotatable en masse about an axis extending perpendicularly through the center of said each face.
Claim 13
Dependent Claim
70 words
A device according to claim 10 wherein each corner face has a prescribed indicia thereon, the prescribed indicia being selected such that by (a) rotating each 1/8th section of each cube relative to the respective tetrahedron to a prescribed position and (b) rotating the four cubes along each of the six faces to place said cubes in predefined respective positions, a preselected indicia pattern is provided on each block face.
Claim 14
Dependent Claim
91 words
A device according to claim 9 further comprising eight of said cubes arrangeable into a 2×2×2 block of cubes and wherein the cubes in the block are interchangeable and reorientable therein; and wherein each corner face has a prescribed indicia thereon, the prescribed indicia being selected such that by (a) rotating each 1/8th section of each cube relative to the respective tetrahedron to a prescribed position and (b) arranging the cubes along the six faces into predefined respective positions and orientations, a preselected indicia pattern is provided on each block face.
References Cited (Backward Citations)
US1216840A
Cited
US2236926A
Cited
US2839841A
Cited
US3081089A
Cited
US3289322A
Cited
US3659360A
Cited
US3655201A
Cited
US3645535A
Cited
US3953948A
Cited
US4014110A
Cited
US4317654A
Cited
JPS553956A
Cited
JPS558193A
Cited
JPS558192A
Cited
US4238905A
Cited
US4258479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |