Abstract: An overhead door locking apparatus and method which includes a lock housing containing a pivotally mounted locking element having an elongate recess to receive an actuating bolt on or associated with the overhead door. Downward movement of the overhead door to a closed position causes the actuating bolt to pivotally move the locking element, and hold the same in a locked position. An electrically operated solenoid or a mechanical manually operable release arm causes movement therefrom to the unlatched position, allowing the locking element to open. The apparatus and method do not rely upon an electrically operable circuit to cause the door to automatically lock when it moves to the closed position. In this way, the door will automatically lock in the event that personnel overlook the need for locking the same after a certain time period.

Abstract: A method and apparatus for selectively securing and unsecuring a movable closure to a support frame is provided. The security device of the present invention comprises a locking assembly attached to the frame and a securing element attached to the closure. The locking assembly comprises a first rotating element having a detent, a second rotating element being engaged with the first rotating element, and a rotating latching element being selectively engageable with the second rotating element. When the movable closure is secured, the detent of the first rotating element is securely coupled with the securing element.

Abstract: A method and apparatus for selectively securing and unsecuring a movable closure to a support frame is provided. The security device of the present invention comprises a locking assembly attached to the frame and a securing element attached to the closure. The locking assembly comprises a first rotating element having a detent, a second rotating element being engaged with the first rotating element, and a rotating latching element being selectively engageable with the second rotating element. When the movable closure is secured, the detent of the first rotating element is securely coupled with the securing element.