Patents of Interest to Builders.

Progress, Volume XVII, Issue 2, 1 October 1921, Page 47

Patents of Interest to Builders.

Concrete Building Construction. — patent, No. 45,083, has been taken out by G. A. Hayter, of Hamilton, which consists in utilising members precast in concrete, together with temporary shutters or boxing to provide the necessary moulds for forming solid walls and partitions.

The precast members which are left permanently in the walls and partitions are used at corners, intersections, and intermediately to act as spreaders for the shutters and serve to stiffen the construction until the concrete sets. The precase members are. formed in sections, and special means are provided for connecting- same together and also to the concrete filled between the shutters.

Concrete-mould.—A patent, No. 45,140, has been taken out by A. S. Greene, of U.S.A., which comprises side walls, means for holding said side walls in spaced rela-

tion, an end gate comprising a pair of members having overlapping end portions and rearwardly extending flanges pivotally connected at their upper corriers with the upper

corners of said side wall, and a latch for temporarily hold ing the lower portion of said gate in position.

Concrete Building Block. —a patent, No. 42,612, has been taken out by John Morgan, of Melbourne, for a building block, the outstanding feature of which resides

in the formation on one side of the slab of a suitable number of vertically extending locking-pieces or ribs, which are adapted to form dovetail grooves or recesses extending vertically from the upper to the lower edges of the slabs. By arranging a series of these slabs opposite each other to form the double wall of a building, and with

the outer end faces of the opposite locking-pieces abutting each other, the dovetail grooves or recesses of the two opposite series of wall-slabs are disposed directly opposite and in communication with each other, thereby forming double or opposed dovetail passages to accommodate vertical columns of corresponding shape by which the slabs are locked together in assembled position.