Patent ID: 7922556

Claim:
A versatile interlocking crossbar device and interlocking system comprising mortise and tenon type assembly used to connect and join one or more interchangeable modules or interchangeable components by internally intersecting at any measured point along the length of the crossbar with a locking pin; such crossbar(s) are inserted into pre-formed mortise or slots in each interchangeable indexed module to join and stabilize each module or component until the lock pin can be inserted to internally intersect the crossbar, thereby locking the unit together; such locking pin is held in place either by gravity or a close tolerance friction fit that secures each of the modules or components together, creating various assemblages including toys and puzzles that retain their shape in 3 dimensional free-standing and mobile form; and wherein the modular pieces fit together and one or more interlocking crossbar devices connect the puzzle or the toy assemblage to allow a finished device to be played with and picked up while still retaining its free-standing three-dimensional shape.