VERSCHIEBBARE, SICH OEFFNENDE UND SCHLIESSENDE DACHDECKUNG.

摘要

A central hub carries a main pivotal shaft, on respective sides of which extend pivotal links, to each of which is fixed an end of a truss which trusses can be moved together and parallel when the links are in a straight line for displacement of the structure, and can be spaced and radiating when the links are disposed along a closed contour, for use of the structure.