Abstract: A coupling and load support for suspending or hanging a load from the head of a coal mine roof bolt wherein the coupling takes the form of a thin-walled, open-ended, substantially square-shaped housing or receptacle which is structured so that the upper portion thereof can be rigidly attached to the head of the roof bolt by one or more bolts threadedly carried in the housing and is also structured so that the lower portion thereof can carry or be connected to a load support. A load of various types can be carried by the load support and the load can thereby be suspended from the head of the roof bolt.

Abstract: An adjustable and self-locking rack or support for firmly holding one or more books or the like in an upright position on a planar base member. The rack includes a pair of manually adjustable bookends having dovetails thereon which are slidably received in a longitudinally extending dovetail groove in the base member. The bookends are thus slidable or adjustable on the base member and, when moved into engagement with the books, are automatically self-locked to the base member due to the lateral pressure of the books to thereby firmly hold the books in an upright position on the base member.