Builder's hardware; a manual for architects, builders and house furnishers . is complicated in its appearance and also that the springs are 72 BUILDERS HARDWARE. Chapter V. Union Hinge. Torsion Spring-butt. held in place by a moveable push-bar, which, under some cir-cumstances might be knocked out of position and lost, in whichcase the hinge would be practically useless. On the whole,however, it is a most excellent hinge. The - Union spring-hinge, Figure 109, is a form in whichthe resistance is derived from flat band springs. The peg shownabove the spring is moveable, and by turning up the hin
Builder's hardware; a manual for architects, builders and house furnishers . is complicated in its appearance and also that the springs are 72 BUILDERS HARDWARE. Chapter V. Union Hinge. Torsion Spring-butt. held in place by a moveable push-bar, which, under some cir-cumstances might be knocked out of position and lost, in whichcase the hinge would be practically useless. On the whole,however, it is a most excellent hinge. The - Union spring-hinge, Figure 109, is a form in whichthe resistance is derived from flat band springs. The peg shownabove the spring is moveable, and by turning up the hinge-pinthe peg can be set in any of the holes in the pin, as may benecessary to retain the desired resistance. One end of theband spring is fastened to the hinge-pin and the other hooksinto a slot on the adjoining hinge-plate. The hinge illustratedis intended for lisrht doors. For heavier work a hin°;e is madewith four such springs, two on each hinge-pin. Figure 110 shows a form of spring-butt which depends forits action upon the torsion or twisting strain in a steel rod,.
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