PLAY CONSTRUCTION SET Russian patent published in 1996 - IPC

FIELD: toys. SUBSTANCE: play construction set includes set of planer modules manufactured in the form of nonmetal rectangular perforated panels, each carrying alternating grooves and protrusions on edges to put joining rods. Panels are fabricated in the form of corrugated plastic produced from polymer material. Area of panel is πa² where a is length of side of smallest planer square module and π=1,2,3,6,9,12,15,18. Perforation has shape of rectangular holes arranged with spacing equal to 1/2 a, length of tubular protrusion amounts to 1/6 a length of groove is 1/3 a and 5/6 a. EFFECT: simplified design, enhanced entertainment capability. 9 dwg, 1 tbl