Construction-set elements

Abstract

Construction-set elements for use in kits for children and in puzzles. The construction-set element includes a flat rectangular base and a connecting assembly. The connecting assembly includes four groups of protrusion types that can be assembled on the base. The protrusions of the first group have a cruciform cross-section. The protrusions of the second group are tubular with a square-shaped cross-section. The protrusions of the third group are in the form of rectangular plates having barrier-walls along the short sides thereof, the barrier-walls being angled toward one another with the formation of a gap. In the fourth group, the protrusions are positioned at the corners of the base and are made in the form of L-shaped elements, the sides of which are perpendicular to the plane of the base. Sharp portions of protrusions are connected by bridges to make it easier for younger children to use the construction elements.

What is claimed is: 
     
         1 . A construction-set element, comprising: a flat base ( 1 ) having two sides, a rectangular form, base edges having lengths in multiples of «a», and an interlocking joint created by positioning four types of protrusions on the base ( 1 ) and fulfilled with the base ( 1 ) as one unit, wherein:
 a first protrusion type ( 2 ) positioned on at least one side of the base ( 1 ), with a height greater than «0.5a», but not greater than «a», made with a cross-shaped cross-section, where a distance between opposite ends of the cross-shaped cross-section is equal to «a»; 
 a second protrusion type ( 3 ) positioned on at least one side of the base ( 1 ), with a height equal to «0.5a», having a tubular shape with a cross-section in a form of square having sides equal to «a»; 
 a third protrusion type ( 4 ) in the form of a rectangular plate with ledges and a long midline, positioned so that the long midline of the rectangular plate is along the base edges and the ledges ( 5 ) extend from short sides of the rectangular plate, the ledges ( 5 ) having ledge end parts that have a width equal to «a», protruding not more than «0.5a» from the base edges, angled towards each other with a gap formed between their ledge end parts no greater than «a»; 
 a fourth protrusion type ( 6 ) in the form of a corner, having shelves positioned perpendicular to each other and extending outwardly from the base ( 1 ) and having a length equal to «a» and a width not greater than «0.5a», 
 wherein all protrusions are positioned on the base ( 1 ) in accordance with a coordinate grid of lines ( 7 ), wherein the distance between neighboring parallel coordinate grid lines ( 7 ) on the coordinate grid is equal to «2a», the distance between an edge of base ( 1 ) and a neighboring parallel coordinate grid line on the coordinate grid is equal to «0.5a» and cells of the coordinate grid are formed by pairs of intersecting parallel neighboring coordinate grid lines, where those mutually perpendicular grid lines ( 7 ) are parallel to the base edges and the protrusions of the first protrusion type ( 2 ) are positioned at points where the coordinate grid lines intersect, 
 the protrusions of the second protrusion type ( 3 ) are positioned at points where diagonals ( 8 ) of the cells of the coordinate grid intersect, the protrusions of the third protrusion type ( 4 ) are positioned in a middle between neighboring protrusions of the first protrusion type ( 2 ) and flush with the base ( 1 ) ends, 
 the protrusions of the fourth protrusion type ( 6 ) are positioned at corners of the base ( 1 ), 
 wherein 
 the third protrusion type ( 4 ) have protrusions provided with bridges ( 9 ) connecting the nearest ledges ( 5 ) of the neighboring protrusions ( 4 ) to each other, 
 the fourth protrusion type ( 6 ) are provided with bridges ( 9 ) connecting the shelves of the corners of these protrusions, which are the sides of the rectangular plates perpendicular to the base that protrude out beyond the base, with the adjacent ledges ( 5 ) of the protrusions of the third protrusion type ( 4 ). 
 
     
     
         2 . The construction-set element as defined in  claim 1 , wherein bridges ( 9 ) have a width that is the same as the width of ledges ( 5 ). 
     
     
         3 . The construction-set element as defined in  claim 1 , wherein the bridges ( 9 ) are flat. 
     
     
         4 . The construction-set element as defined in  claim 1 , wherein the bridges ( 9 ) are concave. 
     
     
         5 . The construction-set element as defined in  claim 1 , wherein the bridges ( 9 ) are convex. 
     
     
         6 . A construction-set element, comprising: a flat base ( 1 ) having two sides, a rectangular form with at least one base edge having a first length equal to «a», and another base edge having a second length that is a multiple of «a», and an interlocking joint, created by positioning three types of protrusions on the base ( 1 ) and fulfilled with the base ( 1 ) as one unit, wherein:
 a first protrusion type ( 2 ) is positioned on at least one side of the base ( 1 ), with a height greater than «0.5a», but not greater than «a», with a cross-shaped cross-section, where the distance between opposing ends of the cross-shaped cross-section is equal to «a», 
 a second protrusion type ( 4 ) in the form of a rectangular plate with ledges and a long midline, positioned so that the long midline of the rectangular plate is along the base edges of the second length and the ledges extend from short sides of the rectangular plate and the ledges have ledge end parts that have a width equal to «a» flush with the base ( 1 ) ends protruding not more than «0.5a» from the base edges of the second length, and angled towards each other with a gap formed between their ledge end parts no greater than «a», 
 a third protrusion type ( 6 ) in the form of a corner, having shelves positioned perpendicular to each other and extending outwardly from the base ( 1 ) flush with the base ( 1 ) ends and having a length equal to «a» and a width not greater than «0.5a», 
 wherein all protrusions are positioned on the base ( 1 ) in accordance with a coordinate grid of lines, wherein the distance between neighboring parallel coordinate grid lines on the coordinate grid is equal to «2a» and the distance between one of the base edges and a neighboring parallel coordinate grid line on the coordinate grid is equal to «0.5a», wherein 
 the protrusions of the first protrusion type ( 2 ) are positioned at points where the coordinate grid lines intersect, 
 the protrusions of the second protrusion type ( 4 ) are positioned in a middle between neighboring protrusions of the first protrusion type flush with the base ( 1 ) ends, 
 the protrusions of the third protrusion type ( 6 ) are positioned at corners of the base ( 1 ), 
 wherein 
 the protrusions of the second protrusion group ( 4 ) are provided with bridges ( 9 ) connecting the nearest ledges ( 5 ) of the neighboring protrusions ( 4 ) to each other, and 
 the protrusions of the third group ( 6 ) are provided with bridges ( 9 ) connecting the shelves of the corners of these protrusions ( 6 ) and the adjacent ledges ( 5 ) of the protrusions of the second group ( 4 ). 
 
     
     
         7 . The construction-set element as defined in  claim 6 , wherein the bridges ( 9 ) have a width that is the same as the width of ledges ( 5 ). 
     
     
         8 . The construction-set element as defined in  claim 6 , wherein the bridges ( 9 ) are flat. 
     
     
         9 . The construction-set element as defined in  claim 6 , wherein the bridges ( 9 ) are concave. 
     
     
         10 . The construction-set element as defined in  claim 6 , wherein the bridges ( 9 ) are convex.