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Hoberman Sphere (Octahedron)

number of rings
1
2
lift
2
scissors
4
8
12
16
20
diameter of pivot
0.12
diameter of nodes
0.1
large format
Expandable flat rings made of scissors are placed on a sphere's great circles that lie along the edges of an invisible octahedron. The number of scissors in a ring must be divisible by four. The geometry of this assembly corresponds to that of a Hoberman sphere.
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