Improvements in and relating to the construction of chimneys, stacks, fireplaces, chimney breasts and like parts of buildings

摘要

301,224. Roberts, E. W., and Temple, J. E. Dec. 23, 1927. Building-blocks; special shapes of. - Flues are formed of grooved blocks 1, Fig. 12, which are superposed in pairs so that the grooves provide the flue passage as shown in Fig. 9. The cross-section of the blocks may be of any desired form.