Abstract: A self-aligning, self-retracting quarter-turn fastener assembly in which one of two members to be joined rotatably supports the fastener and is provided with an elongated recess into which a crosspin intermediate the ends of the fastener shaft is urged by a spring when the fastener is in such a relative rotary position that the crosspin is aligned with an elongated slot in the member which carries the fastener receptacle. The portion of the fastener shaft extending beyond the crosspin acts as a pilot as the members are brought into cooperative relationship to ensure proper relative positioning of the members. The assembly has special utility in an installation in which a multiplicity of fastener assemblies are used.

Abstract: A clamp for securing a pair of members in assembled relationship in which a drawhook formed of resilient material with a loop intermediate its ends is frictionally supported at one of its ends for pivotal movement around a first axis on an arm supported on one of the members for pivotal movement around a second axis spaced from the first axis in response to operation by a tool from a released position at which the drawhook is retracted against a stop, through an intermediate position at which the drawhook moves with the arm to engage a strike on the other member, to a locked-up position at which the first axis moves to a beyond-dead-center position with respect to the second axis. The arm is provided with positive means for engaging the drawhook to insure that it moves to fully retracted position when the operation is reversed.