Apparatus for securing exercise weights on shafts

In a bar bell exercise apparatus comprising weight-discs and an elongate lifting bar having threaded ends and a longitudinal groove passing through the threads, a weight-disc securing device comprising:

• a sleeve-like collarpiece which has a serrated longitudinal flange in the cavity thereof and a rotatable gasket on its face for snubbing contact registry with a mounted weight-disc, said gasket comprising an O-ring of resilient material, said gasket affixed to the flat annular surface of a ball-bearing and race which is set into the disc-contacting face of said collarpiece, whereby when weight-discs are emplaced on said bar ends and said collarpiece is slid, with said flange in said groove, over a disc-bearing end and placed in registry with said disc, said registry will be effected securely by rotation of said collarpiece and its snubbing against said discs due to engagement of the serrations of said flange with said threads.

A mechanism for securing an object which is slidably mountable on an elongate member so as to prevent retrograde sliding motion comprising;

• a collarpiece having a hole therethrough and at least one detent projecting radially inward from the surface of said hole and further comprising on at least one face of said collarpiece an annular gasket mounted on an annular ball-bearing/race concentric with said hole;
• and
• an elongate member for mounting a cylindrically bored object thereon, said member having threads adapted to an end thereof, said threads containing the number of orthogonal longitudinal channels necessary to slidably receive said collarpiece detents when said collarpiece is fitted over said end, whereby said collarpiece may be slid into registry with said object to be secured and thereafter rotated so that said detents engage said threads urging said collarpiece into tighter registry with said object to be secured.