Patents of Interest to Builders.

Progress, Volume XV, Issue 4, 1 December 1919, Page 680

Patents of Interest to Builders.

Concrete Building Block— patent, No. 42056, has been taken out by Tom Sutcliffe, of London, which consists of a method of moulding a hollow concrete or like building-block having full faces upon all its aspects and walls of uniform thickness, wherein loose sand or the

like is introduced to form a core or cores , during the moulding, the shape of which core is determined by a liner, the sand or the like, being subsequently removed through holes formed in the walls of the block. Window Frame or Sash, MetalA patent, No. 42154, has been taken out by F. J. Gibbons, of Stafford, England, which consists in a construction, whereby the sliding-sash when slid open becomes pivoted vertically so that it can be turned inwards to provide ready access

to its outer surface from the inside of the building. For this purpose means are provided to pivot the sliding-sash vertically when slid open, and simultaneously to permit same to leave the guides on which it slides, from which it is previously precluded from leaving.