Toy building set

Abstract

A toy building set comprising interconnectable bricks, each brick having a substantially square, flat contour with two opposite main faces, a first face having a substantially square hollow having four projections rising from its bottom, a second face having four seats aligned to the pins, in which the pins of another brick are insertable with a friction fit. Two first side faces have respective central projections extending therefrom, and two second side faces have two lateral projections extending therefrom, between which one central projection of another brick is insertable with friction fit.

1 - 9 . (canceled) 
   
   
       10 . A toy building set comprising interconnectable bricks, said bricks each having a substantially square, flat contour, and further having:
 two opposite main faces, a first one of which has a substantially square hollow having at least two pins rising from a bottom of said hollow, and a second one of which has at least two seats aligned to the pins, in which the pins of another brick are insertable by a friction fit,   two first side faces each having a central projection extending therefrom,   two second side faces each having two lateral projections extending therefrom, between which one central projection of another brick is insertable with a friction fit.   
   
   
       11 . The toy building set of  claim 10 , comprising four of said pins arranged in square and four of said seats aligned to the pins. 
   
   
       12 . The toy building set of  claim 10 , wherein said pins and said seats have complementary square profiles. 
   
   
       13 . The toy building set of  claim 10 , wherein said second main face has a salient edge insertable with a friction fit into the square hollow of another brick. 
   
   
       14 . The toy building set of  claim 10 , wherein the shortest distance between the side faces of two adjacent pins is substantially equal to the thickness of said lateral projections and central projections, whereby said lateral projections and central projections are insertable at right angles with a friction fit between adjacent pins. 
   
   
       15 . The toy building set of  claim 10 , wherein the shortest distance between the side faces of each of the pins and the inner, peripheral surface of the square hollow is substantially equal to the thickness of said lateral projections and central projections, whereby said lateral projections and central projections are insertable at right angles with a friction fit between the pins and the peripheral inner surface of the square hollow. 
   
   
       16 . The toy building set of  claim 10 , further comprising a flat shell having a rectangular profile, to which an identical, upturned shell is connectable to contain a plurality of bricks, and having a plurality of grooves in which said lateral projections and central projections are insertable at right angles with friction fit. 
   
   
       17 . The toy building set of  claim 16 , wherein at least one of said grooves is cross-shaped. 
   
   
       18 . The toy building set of  claim 10 , wherein at least one of said grooves is rectilinear.