This invention relates to toy building elements and more particularly to toy building bricks or blocks adapted to be connected togetherby means of projections extending from the faces of the elements and arranged so as to engage protruding portions of an adjacent element when two such elements are assembled- Toy elementsof this kind will be referred to generally as building bricks, and the principal object of the invention is to provide improved coupling means for clamping such building bricks together in any desired relative position thus providing for a vast variety' of combinations of the bricks for making toystructures of many different kinds and shapes. Fundamentally, a toy building element according to the inventioncomprises a base plate provided with projections at either face thereof, the projections at one face being arranged in such a manner relatively to the projections at the other face that the distance between a pair of projections at one face of the base plate is equal to the maximum of the projections at the other face oi the base plate. H Other embodiments of the invention, including building blocks in the shape of a rcctangular parallelepiped ofa hollow construction having one open face, will be described with reference to the accompanying drawings, in which: FIG. 1 is a view of a toy brick of the basic t ype comprising a base plate provided with projections at both faces. FIGURE 2 is aplan view in the direction of the open face of a preferred embodiment of the invention in the form of a building block inthe shape of a rectangular parallelepiped of hollow construction with one open face and four side walls; FIGURE 3 shows a section of the block shown in FIGURE 2, along the line 33' in the direction of the arrows; FIGURE 4 illustrates the assembly of two blocks displaced relative to one another in the lengthwise direction thereof, FIGURE 5 shows a section of the coupled blocks 2, 2a taken on the line 5-5 of FIGURE 4 looking in the direction of the arrows; FIGURE 6 is a view wherein the two blocks are laterally displaced relative to one another;
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Seminar: Building brick Profesor: Scripcenco Angela