Abstract: A connecting apparatus is provided for removably attaching a first member to a second member. The first and second members include respective mating surfaces which mate with each other. A pivot arm is situated adjacent one end of the mating surface of the first member. A jack screw is retained adjacent the remaining end of the mating surface of the first member. The jack screw includes a threaded end which extends from the mating surface of the first member and which faces the second member. The second member includes a pivot structure adjacent one end of the mating surface of the second member. The pivot structure of the second member permits the first member to pivot about the pivot structure when the pivot arm of the first member is removably engaged in the pivot structure. A screw captivating structure is situated in the second member for captively engaging the jack screw when the mating surface of the first member is pivoted toward and mated with the mating surface of the second member.

Abstract: A keying apparatus is provided including a key support structure having a plurality of protrusions which mate with a corresponding plurality of recesses formed in an edge surface of a printed wiring assembly. The key support structure includes a mechanism for permanently latching the key support structure at a predetermined location on a mounting rail adjacent a backplane interconnect. The printed wiring assembly is conveniently removable from the key support structure. This keying apparatus assures that when a printed wiring assembly is removed from the key support structure at a predetermined location on the rail, only the proper printed wiring assembly may be reinserted at that location.