Patents of Interest to Builders.

Progress, Volume XV, Issue 9, 1 May 1920, Page 798

Patents of Interest to Builders.

• Building Block.—A patent, No. 41,964, has been taken out by Messrs. A. St'evens, N. A. Stevens, and H. G. R. Mackay, Wellington, which comprises two slab portions disposed in echelon relation and parallel with

one another so as to constitute portions of the inner and outer surfaces of the wall, And a transversely disposed web portion uniting the adjacent ends of said slab portions. Other features are contained in invention.

Open Fireplace Flue Arrangement.—A patent. No. 41,024, has been taken out by J. M. Reid, Willis Street, Wellington, which consists of a secondary flue passing

through the firebrick back of fireplace, or through a boiler at back and sides of. fireplace, such flue leading up the back of fireplace and into the main flue.

Building' Block. A patent. No. 41240. has been taken out by T. C. Mullions, Smeeton’s Buildings. Auckland, .which invention consists in constructing each block of two members arranged face to face, the relatively outer surfaces of each of which, as well as their top, bottom, and end surfaces, are made plain, while their adjacent inner surfaces are shaped to form vertically extending ribs projecting from such surfaces in positions respectively opposite one another and at desired intervals in the block-length, and which two members are then tied together so as to leave a continuous space between

them, by means of wire ties extending across between the, ribs and embedded at their ends into the respective

members. These wire ties are embedded in the block during the moulding thereof.

Concrete Construction Appliances. —A patent, No. 42,593, has been taken out by W. J. Dyas, Kensington, Dunedin, which comprises the combination' of soecial bolts for securing boards end to end ,also special bolts for securing the boards at an angle. The invntion also

consists of special cramps, either in one or several nieces, for adjusting to various thicknesss of wall or walls. Bands in one piece or in more for the purpose of adjusting to the sizes of walls or studs, for supporting studs that in their turn support the boxes or formes, are also employed. ...

Ply Board or Sheet Manufacture.—-A patent, No. 42,382, has been taken out by S. E. Saunders. Whippingham, Isle of Wight, England, which comprises a plural-

ity of layers of thfn board or veneer united together by means of stitching of thread, twine or the like. .Grooves may be formed in'which the stitches are laid, • ~