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.

Abstract: A locking arrangement for double gates whereby one or both gates may be conveniently locked against opening. The arrangement uses an extended vertical bolt on one gate and a conventional type latching bar on the other. A latch plate is adapted to receive a projection at the top end of the bolt and the latching bar for the purpose of retaining both in a locked condition using a single lock or just the projection for retaining only the bolt in a locked condition. A lock mechanism on each side of the gates is adapted to actuate a mechanism for retaining the latching bar and/or projection in the latch plate. The arrangement allows one gate to be unlocked for pedestrian traffic while the other is locked to prevent passage of large articles through the gates.

Abstract: A latch assembly for use in combination with slidable doors is disclosed. A rotatable disk is connected to the door so that the plane of the disk is perpendicular to the door and parallel to the direction of door movement. A lock bolt which projects from the door jam is adapted to engage a slot in the disk as the door closes, causing the disk to rotate. As the disk rotates, it slides with respect to a spring loaded latch bolt until the bolt slides through a second slot in the disk, when the door is fully closed. Efforts to effectuate a forced entry of the door cause the resulting forces to be passed primarily between the disk and the lock bolt, while the latch bolt's primary function is to prevent rotation of the disk. Thus, an attempted forced entry will not cause excessive forces to be placed on the latch bolt. The latch bolt is slidably connected to a conventional manually operated garage door handle assembly including a lock.