Device with attachable toy building bricks

Claim 3

said recess being of groove-like configuration and extending rectilineally in its longitudinal direction as well as being open toward the top and at the front surfaces of the toy building brick (1), said recess comprising an inner sector (8) of which the cross-sectional surface is complementary to the cross-secton of the endpiece (13) remote from the neck (24, 55) and to the cross-section of the middle piece (11), which inner sector is delimited against an outer sector (9) at the distance from the bottom (4) of the recess (3) substantially equal to the length of the middle piece (11) and one endpiece (13), said inner sector being delimited by two projections (26, 27) engaging the edge (15) of the middle piece (11), an outer sector comprising a middle zone (28) with walls being cylindrical in cross section, the diameter of said only sector being substantially equal to the distance between diametrically opposed edges and there being, at the ends of each of said middle zones, areas (29) extending respectively up to the projections (26, 27) at the inner sector and to further projections (30, 31) at the outer sector, said further projections facing away from the projections (26, 27) at the inner sector (8) and separated by a distance substantially equal to the length of the middle piece (11); between the further projections (30, 31) and edges (32, 39) of the recess (3) extending over them, plane surfaces (36, 37) are arranged flowing outwardly in the upward direction and each forming an angle of 45° C. with a plane perpendicular to the bottom (2) of the recess, that at least one other recess (40) is provided, the cross-section of which being adapted to the cross-section of the neck (24, 55), and which crosses the first recess (3) at an angle of about 90°, the bottom (41) of the additional recess (40) is substantially level with the edges of the walls of the middle zone (28).

Claim 4

said recess being of groove-like configuration and extending rectilineally in its longitudinal direction as well as being open toward the top and at the front surfaces of the toy building brick (1), said recess comprising an inner sector (8) of which the cross-sectional surface is complementary to the cross-secton of the endpiece (13) remote from the neck (24, 55) and to the cross-section of the middle piece (11), which inner sector is delimited against an outer sector (9) at the distance from the bottom (4) of the recess (3) substantially equal to the length of the middle piece (11) and one endpiece (13), said inner sector being delimited by two projections (26, 27) engaging the edge (15) of the middle piece (11), an outer sector comprising a middle zone (28) with walls being cylindrical in cross section, the diameter of said only sector being substantially equal to the distance between diametrically opposed edges and there being, at the ends of each of said middle zones, areas (29) extending respectively up to the projections (26, 27) at the inner sector and to further projections (30, 31) at the outer sector, said further projections facing away from the projections (26, 27) at the inner sector (8) and separated by a distance substantially equal to the length of the middle piece (11); between the further projections (30, 31) and edges (32, 39) of the recess (3) extending over them, plane surfaces (36, 37) are arranged flowing outwardly in the upward direction and each forming an angle of 45° C. with a plane perpendicular to the bottom (2) of the recess, that at least one other recess (40) is provided, the cross-section of which being adapted to the cross-section of the neck (24, 55), and which crosses the first recess (3) at an angle of about 90°, the bottom (41) of the additional recess (40) is substantially level with the edges of the walls of the middle zone (28).

Claim 5

The device of claim 1 comprising bead-like projections (141, 142, 143, 144) in the sidewalls of the additional recess (40), located at a distance from the bottom (41) of the additional recess (40) such that said neck is positively retained in the recess (40).

Claim 6

The device of claim 1 wherein said toy building brick (1, 44) is provided with at beveled plane surfaces (46, 47) inclined at 45° to a line perpendicular to the bottom (4) of the recess (3), said level being at least on the two outer longitudinal edges at a level with the upper opening of the recess (3).

Claim 7

The device of claim 3 wherein the thickness of the wall between the outer surface (42, 43) of the ashlar-shaped toy building brick (1, 44) and the recess (3) corresponds to the length of the neck (24).

Claim 8

The device of claim 1 wherein the thickness of the wall between the side face (35) of the toy building brick (34, 44) and the recess (3) corresponds to the length of the neck (24).

Claim 9

The device of claim 1 wherein there are two plug-in heads (10) each connected to an end of a neck (55), the length of said neck corresponding to the distance between the inner sector (8) of a first toy building brick and the outer sector of a second toy building brick, the recesses (3) of the two toy building bricks are bordering on one another in alignment.

Claim 10

The device of claim 1 wherein the area (49, 50) abutting both sides and the bottom (4) of the recess, there being (51, 52) extending in longitudinal direction of the recess (3).

Claim 11

The device of claim 1 wherein said middle piece (11) is a cylinder and the endpieces (12, 13) are truncated cones.

Claim 12

The device of claim 1 wherein said middle piece (12, 13) and the endpieces in cross-section (11) are polygonal in cross-section, said endpieces having a whole number of areas bewtween the edges.