Arch forming structure

Details Arch forming structure Arch forming structure

E - Fixed Constructions

04

B

72/62, 72/9

E04B 1/32 (2006.01) E04B 1/344 (2006.01) E04B 7/10 (2006.01) E04C 3/38 (2006.01)

Patent

CA 1116883

TITLE AN ARCH FORMING STRUCTURE INVENTOR Leslie T. Russell ABSTRACT OF DISCLOSURE An arch forming structure comprising a flexible arch forming member centerpiece with hinged pairs of struts attached by hinges to each side. The hinged pairs of struts are hingedly attached to a base and collapse inwardly beneath the flexible member. Two tension line lengths are used to snap the hinged pairs of struts from the collapsed condition through dead center to an outwardly sloping position from which further movement is prevented by their central hinge. Two further tension line lengths are jointed to central portions of the hinged pairs of strut members and threaded through eye bolts on the underside of the flexible member and are tensioned by outward movement of the hinged pairs of struts to bend the flexible member into an arch.

352073

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