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Two bars are hinged together at their midpoints to form scissors. You can bend the bars at the hinge to produce a cross similar to the Hoberman linkage. Such scissors are arranged in a circle and similar circles are stacked to make an extendable tower. If the bars connecting the base nodes are shortened, then the tower is extended.
Contributed by: Sándor Kabai (September 2008)
Additional Contribution by: Niels De Temmerman
Open content licensed under CC BY-NC-SA
N. De Temmerman, "Design and Analysis of Deployable Bar Structures for Mobile Architectural Applications", PhD thesis, Vrije Universiteit Brussel, 2007.
Wolfram Demonstrations Project
Published: September 17 2008