Construction system

Claim 2

Construction system, comprising: (a) a main body formed of a light weight material having a plurality of sides each of which has a triangular recess, and (b) a connecting member having a diagonal hinge line formed by a score on each side and dividing the member into two parts, each part being a triangle that fits snugly into one of the said recesses in the main body, said member being relatively resistant to bending except along said hinge line, the recess being twice as thick as a single connecting member, and (c) a triangular filler having the same thickness as the connecting member adapted to lock a single triangular part of a connecting member in place in a recess.

Claim 3

Construction system as recited in claim 1, wherein the cruciform intermediate element having the size and shape derived from a square sheet from the sides of which are removed 45° triangular portions, the base of each triangle lying along the side of the square sheet, but stopping short of the corners of the sheet by a substantial distance.

Claim 4

Construction system as recited in claim 2, wherein two main bodies can be joined in line by using two connecting members with the hinges extending between the bodies at a right angle to the joined sides, wherein two main bodies can be joined at an angle by using two connecting members with their hinges lying parallel and between the joined sides, wherein three main bodies can be joined with two in the same plane and one at a right angle to that plane by using three connecting members, wherein the three main bodies can be joined at 120° to each other by using three connecting members, wherein four main bodies can be joined at 90° to each other by using four connecting members, and wherein five main bodies can be joined to form an open-sided cube by using either connecting members and sixteen fillers.

Claim 5

Construction system as recited in claim 1, wherein the connecting member is formed from a material consisting of two sheets of paper between which is sandwiched a layer of foamed plastic.

Claim 6

Construction system as recited in claim 1, wherein the main body is square and consists of two spaced, parallel sheets between which is sandwiched a cruciform intermediate element defining the said recesses.

Claim 7

Construction system as recited in claim 5, wherein each of the sheets consist of two sheets of paper between which is sandwiched a layer of resilient foamed plastic.

Claim 8

Construction system as recited in claim 1, wherein a support element is provided having two triangles joined by an intermediate portion, each triangle being capable of fitting snugly into one of the said recesses, the intermediate portion having hinge lines to permit it to be folded into a box-like configuration of triangular cross-sections.