Abstract: There is disclosed a spring hinge comprised of a pair of hinge leaves each having at least one tubular hinge knuckle, the knuckles being in axial alignment to define a bore, a torsion spring member extending axially through the knuckle bore and having its opposite ends affixed to a pair of capstan members for rotation in unison therewith. The first capstan member is non-rotatably mounted within one of the hinge knuckles, while the second capstan member is rotatably mounted within the other hinge knuckle. The second capstan member includes a plurality of circumferentially spaced sockets selectively movable into registry with a through aperture in the associated hinge knuckle, such that a retaining pin member may be inserted therein. The pin member holds the capstan in a desired radial position to impart a desired degree of torsional force or tension to the spring member. The pin member has first and second portions of different diameters thereby defining a shoulder portion.

Abstract: A plug is offered to make relatively easy and simple the assembly and pre-torquing of a spring-loaded hinge for doors and the like. These hinges comprise a pair of hinge leaves, each leaf defining at least one hollow hinge knuckle aligned with a hinge knuckle defined on the opposite leaf. Through the knuckles, a bi-ended torsion spring mechanism is inserted. A first plug is affixed within one hinge knuckle and engages one end of the torsion spring mechanism. At the opposite knuckle and second spring end, the novel second plug is affixed. This second plug includes a spring-engaging finger and a capstan body adapted to fit snugly within the knuckle. Atop the capstan body is a removable head which can be grasped by a wrench or like torsioning device. After this second plug is inserted in the hinge, the spring end is grasped and torqued by rotating the plug.

Abstract: A plug is offered to make relatively easy and simple the assembly and pre-torquing of a spring-loaded hinge for doors and the like. These hinges comprise a pair of hinge leaves, each leaf defining at least one hollow hinge knuckle aligned with a hinge knuckle defined on the opposite leaf. Through the knuckles, a bi-ended torsion spring mechanism is inserted. A first plug is affixed within one hinge knuckle and engages one end of the torsion spring mechanism. At the opposite knuckle and second spring end, the novel second plug is affixed. This second plug includes a spring-engaging finger and a capstan body adapted to fit snugly within the knuckle. Atop the capstan body is a removable head which can be grasped by a wrench or like torsioning device. After this second plug is inserted in the hinge, the spring end is grasped and torqued by rotating the plug.

Abstract: There is disclosed a security hinge construction comprising a pair of hinge leafs adapted for attachment to a door or a door frame, or the like. Each leaf includes at least one knuckle which is disposed adjacent to and is moveable relative to the knuckle on the other of said leaves. An electrical circuit component such as a switch, is carried by one of the knuckles, with operating means being carried by the other of said knuckles, and with an actuator member disposed therebetween. Upon movement of the hinge leaves the operating means will move relative to the circuit component and the actuator means to activate said switch, as an indication of a change in the relative orientation of said hinge leaves.

Abstract: Two door pivot units are provided for causing radially outward or walking door motion when the door undergoes angular opening motion. In a first pivot unit, a cam follower is pushed with increasing force against a cam as the door opens by an adjustable biasing device. In a second unit, an arrowhead-shaped cam causes radially outward door movement similar to the motion caused by the first unit.