Universal unit for toy blocks

Claim 1

A universal block unit for interengagement with three dimensional structural toy blocks which have at least two rows of correspondingly uniformly spaced first and second interlocking elements on a pair of opposed surfaces respectively, said first interlocking elements comprising receptacles and said second interlocking elements comprising pins conforming to and axially aligned with said receptacles, said universal block comprising, a flat panel having a length equal to a multiple of the distance between the centers of two adjacent interlocking elements and a height equal to a multiple of the height of said toy blocks, said panel having formed along each of its opposed longitudinal edges a transverse integral surface extending perpendicular to one of the frontal faces of said panel, each transverse surface having a width equal to the distance between the centers of said interlocking elements, and a single row of first interlocking elements formed on one of said transverse surfaces and a single row of second interlocking elements formed on the other of said transverse surfaces, said interlocking elements on each of the transverse surfaces being offset from the adjacent edges of said transverse surfaces by one-half the distance between the centers of adjacent elements to mate with the interlocking elements on said toy block.