Abstract: A bolt mountable on adjacent members of a structure having a bolt assembly mountable on a first member of said structure and a keeper assembly mountable on a second member of said structure. A slide bolt is positioned to move slidably in a first channel in a slide block of bolt assembly which is aligned between the bolt assembly the keeper assembly to provide locking operation with a locking pin depending thru the keeper and is controllable from above keeper. The slide block includes a second channel in longitudinal connection with first channel, but not having entire lengthwise communication with the first channel in order to provide for compressibility. A coil spring is positioned in the second to react with the slide bolt, and a retainer depends from near one end of the slide bolt to provide compressibility for the coil as the slide bolt is locked.

Abstract: A bolt mountable on adjacent members, such as a door and a door frame, to hold the members lockably secure, comprises a bolt assembly on a first member and a keeper assembly on the second member. The bolt assembly includes a flat, elongated slide bolt slidably therein. The slide bolt has a locking pin opening at one end to receive and hold securely a locking pin of the keeper assembly, and a control stem at the other end extending through a slot in the bolt to the exterior. A pair of shoulders at the end of the slide bolt define a narrow passageway communicating with the locking pin opening. A narrow stem is connected axially to the locking pin and extends through an opening in the keeper assembly cover to the exterior of the bolt. A coil spring below the locking pin urges the locking pin toward the exterior.