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US 4,253,268 AGranted
Playtoy building block set
OwnerAugust A. Mayrinventor
Life of this patent
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OwnerAugust A. Mayrinventor
Estimating the term…
A play building block toy set has flat plate elements of semi-elastic plastic material that interlock with pressure inserted ball socket joints. The flat plates may have various geometric shapes such as triangles, squares, etc. with each side the same length and having identical mating ball and joint locking elements. Along each block side mid-spaced between the center and two corners are respectively a ball and a socket. The ball is placed in a semi-circular cutout and is fastened by a stem to the plate. The socket is formed with a skull cap type cutout and rim members that elastically receive and hold the ball when forced or twisted thereinto. To achieve an insertion angle of 270.degree., the ball center and the socket center are on the bottom plane of the plate. The socket has two thickened rims extending below the plate. Means are provided for mounting shafts through holes in the plates.
Toy building element sets comprising a plurality of building blocks in the form of generally planar square plates of semi-elastic plastic material with each side having similar mating snap locking elements therein of the ball and socket elastic pressure engagement type, said plates having a planar upper surface with the ball and socket elements having their center located on the edge of the plates and terminating at the lower planar surface of the plates so that the ball and socket elements extend upwardly from the lower planar surface of the plates, a further set of ball and socket elements located along the centerline of said plates, and said ball and socket elements of each side including structures permitting two adjacent interlocked plates to be disposed at angles to each other over a range of 0.degree. to 270.degree..
Dependencies are inferred from the claim text.