Parallel axes compound balance

Details Parallel axes compound balance Parallel axes compound balance

E - Fixed Constructions

05

F

E05F 7/06 (2006.01)

Patent

CA 2681493

An apparatus and method to substantially cancel out the opposing torsional forces of the torsion spring of a spiral rod subassembly and the extension spring of a compound spiral rod balance on the carrier element. The extension spring and the rod spiral balance subassembly are parallel, connected at their lower ends to a carrier element and at their top ends either to an upper mounting cap or separately to the wall of the jamb channel. The spiral rod is turned a pre-determined number of times in a direction opposite from that in which the extension spring is turned so that the torsional forces acting on the carrier element from the torsion spring and the extension spring substantially cancel out each other. The balancing out of the counteracting torsional forces eliminates or substantially reduces the friction between the carrier element and the jamb channel.

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