Patent ID: 6116980
Filing Date: 2000-09-12
Classification: A63H

Abstract:
A set of elements, each element comprising:at least one rectilinear edge having a length along which the elements may be assembled with one another, each rectilinear edge including a plurality of identical protrusions formed thereon;said protrusions being adapted to engage the protrusions on the edge of another element, said protrusions being of the same width and separated from each other along said rectilinear edge by intervals, each interval being formed of a space having at least one unit width, said unit width corresponding to the width of each protrusion, the length of said at least one rectilinear edge having a mid-point, said protrusions and said intervals being arranged along said edge disymmetrically with respect to said mid-point, each rectilinear edge having more intervals than protrusions such that at least three elements may be assembled to each other along one rectilinear edge; andwherein there are four said elements, the edges of the elements defining two series of protrusions, one of said series having four protrusions and the other of said series having five protrusions, said two series of protrusions forming four half-series of protrusions in which the intervals between the protrusions are one of:a) two intervals of one unit width each, one interval of two units width, one interval of four units width and one interval of five units width;b) two intervals of one unit width each, one interval of two units width and two intervals of four units width each;c) two intervals of one unit width each, two intervals of two units width each and one interval of five units width;d) one interval of one unit width, two intervals of two units width each, one interval of four units width and one interval of five units width; ande) three intervals of two units width each and two intervals of four units width each.