hinges

[Dick Fischbeck]

Does anyone know of structures/polyhedrons that have hinges at the center of the edges?

Let me know if I am repeating myself.  Thanks.

[Dx G]

Interesting concept.  I've seen lazy-tong folding, like Hoberman structures, and telescoping struts, but I don't think I've come across any that had a single pivot in the center or elsewhere. One would have to address strength with respect to collapse (especially with twisted elements), but that's not insurmountable.  There might even be some advantages to allowing some restrained movement, more like a tensegrity structure.

Dx G