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Alfred Julius Boult
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22,569. Boult, A. J., [Fuchs, E. G.]. Dec. 11. Blocks; slabs.-Refractory perforated blocks a, of the kind described in Specification No. 13,346 of A.D. 1898, are formed with dovetail or like grooves b, c to receive the cement, plaster, or concrete of the joints, ceiling, and floor. The blocks may be laid with the short side horizontal as shown in Fig. 1, or the wide side horizontal as shown in Fig. 5. The wall and girder blocks d, e, f are also formed with dovetail grooves, and the girder blocks are recessed to engage with girder flanges.
GB190022569D1900-12-111900-12-11Improvements in or relating to Building Slabs or Blocks.
ExpiredGB190022569A
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