Improvements in Fireproof Building Blocks and Slabs, for Walls, Ceilings, Partitions, and the like.

摘要

10,206. Illemann, R. May 5. Building-blocks; slabs.-Fireproof building- blocks or slabs moulded from plaster of Paris and applicable for walls, partitions, ceilings, &c., are made with vertical or inclined helical holes e in the body and at the edges for receiving cement. Interlocking projections c, c1, breaking joint vertically, are formed alternately on the back and front.