Circle in Square Rigidity Mechanism

Abstract

A mechanical utility invention of a semi-circle in a square hollow space that creates a permanent or temporary rigidity key for the member beam of the parent application, U.S. Ser. No. 15/703,993. It has substantially more utilities than its conventional counterparts: spring latches, and expansion clips; in that it is different in shape, is gravity induced, movement is via compression, is comprised of minimal parts, can automatically prevent reverse motion of forward moving parts where prevention of accidental reverse motion is desired or necessary.

1 . A semi-circle shaped key fitted in the hollow space cut out of a segment wall of a member beam from the parent application U.S. Ser. No. 15/703,993, used for gaining rigidity between the segments, wherein designed to prohibit reverse motion of segments joined together where movement of said segment is desired in one direction, but it is necessary to prohibit reverse motion in the opposite direction, comprising: a semi-circle, wherein said semi-circle is fastened loosely off center in a hollow square space in the walls of said segments;
 wherein said semi-circle comprises;   a means for loosely fastening in the hollow space in a manner that allows for movement while receiving pressure from a passing segment,   further said semi-circle comprising:   an off center position fastening providing means for it to be weighted on one side, thereby returning to its original position of protruding into the cavity of the segment, and automatically prohibiting reverse motion of the subsequent segment.