Patents of Interest to Builders.

Progress, Volume XV, Issue 10, 1 June 1920, Page 821

Patents of Interest to Builders.

Concrete-Surface Waterproof Dressing - . —A patent. No. 42,494, has been taken out Ly E. J. W. Taylor, of Christchurch, which consists of cement, red oxide of iron, common salt, and slaked lime in dry form, and thoroughly mixed together.

Shingle Hoofing and Wall Tile and Batten. —A patent, No. 42,877, has been taken out by A. D. Spiers and R. Brown, both of Gisborne, which, according to this invention, the tile has a concave, convex projection downwards from the top, and by this projection the tile hooks

itself to a concave, convex edge formed on the batten. The batten is fixed to the rafters, and in turn each consecutive upper individual tile and row of tiles fits neatly over the individual lower tile and row of tiles, each upper covering one-half sideways and two-thirds in lengthways of each lower tile.

Concrete Floor Construction. patent, No. 40,563, has been taken out by E. Anscombe, Princes Street, Dunedin, which invention comprises blocks or cores, which form a continuous surface to the ceiling and a broken surface to the floor, the spaces being filled and the cores covered with reinforced concrete. The cores are made of compressed asbestos or other suitable sound-proof

and fireproof material, are hollow for the sake of lightness, and of a length suitable for handling conveniently. The bottom of each side of the core has a flange, which flanges space the cores apart and at the same time form a continuous surface to the ceiling.' The spaces between the cores are filled and the tops of the cores are covered with reinforced concrete.

Cottage, Reinforced Concrete Frame. —A patent, No. 41,883, has been taken out by Isaac Harrison, of Tauhinu Road, Miramar, Wellington, the object of which is to provide a portable framing, capable of being constructed in the builder's yard, shop, or elsewhere, and which can be handled and transported as a whole to where desired and erected to provide reinforcement in a concrete wall. The framing can be built to provide the complete reinforcement ot a wall, or of a section thereof, the door and window frames being built in the reinforcement when same is being

constructed. The framing comprises upper and lower plates, horizontal and vertical reinforcing-members, endmembers either permanently secured to the framing or capable of being removed therefrom, after the wall or a section thereof is completed, and, where required, window and

door frames. After the framing hag been placed in position it is boxed up at each side, and the concrete filled in between the boxing, and after the concrete has set the boxing is removed, leaving a solid rcinforced-concrete wall, the surfaces of which can be plastered or finished off as desired. Water Heater.— patent, No. 43,071, has been taken out by dames Albert Spry, 644 Dominion Road, Auckland. According to the invention, a water-supply pipe enters the oven at one side near the back thereof and at a level slightly above the burners. The pipe crosses to the ether side, where a right-angle bend is made to enable the pipe to continue to the oven-front, after which the pipe is returned along the same side and at the same level to the back of the oven so as) to leave a space equal to slightly more than the diameter of the pipe between the two portions thereof at the same side. From the back of the last-mentioned side the pipe crosses again to the back of the first side, and is doubled along the latter in a similar

way and at the same level as the doubled portions at the other side. The pipe then assumes a slightly higher level and commencing at the back of the oven is passed once round the latter, the side portions of the pipe at the higher level being located over the spaces between the doubled portions of the pipes at the lower level. The flames from the oven-burners come in contact with three sections, of .the

pipe at each side of the oven, whereby a maximum area of heating-surface is obtah ed. The hot water passes from the pipe at the higher level at the rear of the firjst-men-tioned side and in close proximity to the inlet. The pipe passed around the interior of an oven as described is connected up to a supply-tank and a cistern, from which the hot water is drawn off.

Tile-Colouring Device. —A patent, No. 42,489, has been taken out by G-. Penman, 35 Ascot Avenue, and W. M. Jeffery, both of Remuera, Auckland, which comprises a drawer with a perforated bottom, slidable in a frame supported on a bracket secured to the tile-making machine, and adapted to be drawn out so that colouring-material placed in the drawer can be worked through the bottom and spread evenly over a tile beneath. Horizontal slips or runners at the sides of the drawer are rebated in both the latter and the frame, and are secured to drawer, said slips or runners being longer than the drawer and extending behind same, so that when the drawer is pulled out it is l supported by said slips. The drawer is provided with '. guide-

pieces on the upper edges of its sides, and has a cover or iid hinged at the back, spaces being left at the sides to permit uprights from a drag or agitator within the drawer to project therefrom and be connected by a cross-bar with a handle therein by means of which the drag can be moved backwards and forwards in the drawer to work the colour-ing-material through the perforated bottom. Frictionrollers recessed in the lower edges of the drawer-sides run on wearing-strips secured on rails below the drawer, and facilitate the moving of same into, and out of the frame. A tray is provided in the frame to catch colouring-material likely to escape from the . drawer when the latter is in the frame and not over a tile.