Structural blocks and assemblies thereof

A set of blocks, each of said blocks being a generally rectangular structure having a top and a bottom face,

• a plurality of substantially rectangular ridges which extend with uniform height above said top face, which are substantially centered within said top face and which are substantially narrower and shorter than said top face of the block, said ridges being spaced longitudinally apart along the top face of the block, and
• a plurality of grooves which are formed with uniform depth in said bottom face, one of said plurality being aligned with said ridges, and the others of said grooves intersecting substantially at right angles and opposite the centers of said rectangular ridges, each groove being dimensioned substantially in width and depth as the female mate to a said ridge and each right angle groove stopping short of the same side of the block;
• and
• each said ridge having a length which is sufficiently greater than its width so that the block of said set are able to slide alone the aligned grooves, but are kept by said ridge from sliding at right angles to the long dimension of said ridge when the set of blocks is stacked with another set of blocks of the same construction.

A generally rectangular structural block having a top and a bottom face, and having:

• a substantially rectangular ridge which extends with uniform height above said top face, which is substantially centered within said top face and which is substantially narrower and shorter than said top face of the block;
• a pair of grooves which are formed with uniform depth in said bottom face, one of said grooves being aligned with and the other of said grooves being at right angles to said ridge, and said grooves intersecting substantially in the center of said bottom face, each groove being dimensioned in width and depth substantially as the female mate to said ridge;
• and
• said ridge having a length which is sufficiently greater than its width so that said block is able to slide along the aligned groove but is kept by said ridge from sliding at right angles to the long dimension of said ridge when the block is stacked together with another block of the same construction,
• said block having at least one pair of lifting anchors embedded therein,
• said anchors being recessed in depressions formed in the top face of the block,
• the different members of the pair of anchors being located diagonally opposite each other, symmetrically with respect to the ridge extending above the center of said top face.