Angular offset stacking building block

Abstract

In some embodiments, a building block includes alignment elements that interlink with a similar block with a positional offset. For example, the positional offset may be linear and/or rotational. For example, the second cinder block may be rotated with respect to the first block on which it is supports. Optionally, protrusions from the top of the block are positioned to interlink to the vertical slots at a fixed offset between the blocks. Optionally, the protrusions are formed by channels on a mold and/or a mold head. In some embodiments, a structure may be built stacked blocks. Optionally, a decorative face is configured to form a continuous decorated surface across offset blocks. In some embodiments a building block includes a calibration feature. For example, the block may include a ridge on the top of the block that may be shaved and/or ground to adjust the height of the block.

1 . A building block comprising:
 a molded body; and   a calibration protrusion.   
     
     
         2 . The building block of  claim 1 , wherein said block contains no vertical undercuts allowing vertical removal of the block from a mold. 
     
     
         3 . The building block of  claim 1 , wherein said calibration protrusion includes a protrusion from a face of the block and wherein said protrusion has surface area less than 1/10 of the surface area of the face. 
     
     
         4 . The building block of  claim 1 , wherein said protrusion is formed in the block before curing and then trimmed. 
     
     
         5 . The building block of  claim 1 , wherein the block further comprises a flat surface opposite said calibration protrusion. 
     
     
         6 . The building block of  claim 5 , where said calibration protrusion includes a flat surface parallel to said flat surface of the block. 
     
     
         7 . The building block of  claim 1 , wherein said calibration protrusion includes a ridge on a top face of the block. 
     
     
         8 . The building block of  claim 1 , wherein the block further comprises a flat bottom surface. 
     
     
         9 . The building block of  claim 8 , where said calibration protrusion includes a top surface parallel to said flat bottom surface of the block. 
     
     
         10 . The building block of  claim 9 , wherein said calibration protrusion includes a protrusion from a face of the block and wherein said protrusion has surface area less than 1/10 of the surface area of the face. 
     
     
         11 . The building block of  claim 1 , wherein said calibration protrusion has a shorter lateral dimension of between 1 to 5 cm. 
     
     
         12 . The building block of  claim 1 , wherein said calibration protrusion has a longer lateral dimension of between 4 to 30 cm.