Abstract: A spring retainer member of lightweight steel construction material formed in accordance with a method comprising the steps of die stamping a square blank of steel construction material, notching out triangular shapes at each of the midpoints between the four corners of the square blank to form between adjacent notches four radially oriented arms extending at 90 degrees to each other, die stamping a shaft-receiving hole centrally of the blank for the subsequent projection therethrough of a shaft, forming in an initial shaping step a cylindrical shape in the blank in the area of the shaft-receiving hole, and forming in a subsequent shaping step a completed cylindrical shape by bending the four arms into adjacent position to each other incident to closing the previously removed triangular shaped notches, whereby the resulting spring retainer member is adapted to be disposed on a shaft of an overhead door mechanism and attached to an end of a counterbalance spring and to a drum support of the overhead door mecha

Abstract: A gate locking system for securely locking a rolling type gate in a closed position within an opposing pair of U-shaped channel guide rails. The guide rails include aligned apertures formed through opposing front and rear walls. The gate also includes an aperture which is aligned with the guide rail apertures when the gate is in the closed position. A guard plate is positioned exteriorly of the guide rails and also includes an aligned aperture. An elongated member of a lock is inserted through the various apertures to lock the members together in the closed position. The head of the lock is retained exteriorly of the guard plate while the distal end of the lock extends beyond the rear wall of the guide rail. A securing member cooperates with an extended end of the elongated lock member to retain the lock in a clamped position between the opposing walls of the guide rail so that the closed gate is captured therebetween. The securing member is under the operative control of a rotatable portion of the lock.