A door locking mechanism for a door which is mounted on the inside of a door which can be hung to open either inwardly or outwardly. The mechanism consists of a lever arm pivotally mounted connected at its ends to extended members which at their opposite ends are connected to lock bolts. The frame supporting the door is equipped with members to receive the bolts when the door is locked. The outside of the door is provided with a lock to move the bolts out or in to lock or unlock the door. The inside of the door is provided with a knob to effect the movement of the bolts.
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