Patents of Interest to Builders.

Progress, Volume XVII, Issue 1, 1 September 1921, Page 21

Patents of Interest to Builders.

Concrete Fencing Post.—A patent, No. 43,463, has been taken out by Herbert Winterburn and James McKay, both of Drury, N.Z., plasterers, which is formed with a number of wire-receiving slots extending across its front face, and. with a hole extending vertically downward from its top end, and with a ledge projecting outwards from such face near the bottom end, having a hole ex-

tending downwards and inwards therefrom into the post, in combination with a reinforced concrete batten adapted to fit at its bottom end on to the said ledge and to extend up the front face of the post, having a wire extending longitudinally through its length, projecting from the batten at its lower end and extending beyond its upper end and being bent into hook form.

' Concrete Building Erection.— Apatent, No. 43,125, has heen taken out by H. E. Manning, builder, of Rugby Street, Wellington, which relates to the erection of concrete buildings formed with solid walls, and provides an improved method of and means for erecting framework and moulds for the aforesaid purpose. In the erection of concrete buildings, according to this invention, a complete outfit of framework and boxing necessary for a building is provided, such framework and boxing being constructed of metal, and formed in such a manner that it is capable of being quickly and rigidly erected,, and also re-used, so that after the initial expense of providing the outfit the cost of framing and boxing for subsequent buildings is rendered negligible, besides which the latter are enabled to be completed in a better manner and in considerably less ■ time than where the old system of wooden boxing is used. In commencing to erect a concrete building the foundations are first laid, and the plates and floor-joists secured in position thereon, together with beams along the outer edges of the . foundations. Angle-iron uprights are then erected on the joists inside the limits of the various rooms, one opposite each corner of the latter, said uprights being braced . from the joists, and connected at their upper ends by horizontal angle irons and clips. Further angle-iron uprights are then placed in position corresponding to the inside corners of

the rooms, and connected with the first-mentioned uprights by tie-rods capable .. of being adjusted to the required tension. Uprights of T iron to hold sheet-metal shutters, which form the moulds for the walls, are then arranged in double rows, the inner rows being placed on the joists and filling-pieces between the ends of the latter, and the outer rows on. the beams laid along the outer edges of the foundations. The T-iron uprights are placed with the flats of the uprights of one row facing the flats of the uprights of the adjacent row, said uprights being preferably inserted in shoes secured to the. joists, fillingpieces, and beams, the uprights of each row being connected at; their upper ends by horizontal angle irons and clips. The horizontal angle irons of the inner and outer sides of a wall-mould are kept a uniform distance apart throughout by means of horizontal spacers, while each wall-mould is kept at the perpendicular and held rigid by means of spacers from a horizontal angle iron connecting the upper ends of the first-mentioned uprights located inside the limits of the-room or building'. The sheet-metal shutters which form the moulds are reinforced at both their horizontal and vertical edges, the former with angle or T iron, which is shaped at its ends to work on the angle ■ and T-iron uprights, between which the shutters are adapted to slide. Also to prevent friction and to facilitate the sliding of the shutters between the uprights, said shutters are fitted with friction rollers or wheels, to bear against said uprights.

Building-Anchoring.— A patent, No. 45,091, has been taken out by J. A. Mason, of Ponsonby, Auckland. According to the invention, anchoring-blocks, formed with bevelled edges in order that their lower surfaces will have a greater area than their upper surfaces and provided with raised portions on the latter, are sunk in the ground at suitable distances apart. The slabs forming the walls rest on the raised portions of the anchoring-blocks, vertical spaces being left between the ends of the wall-slabs directly over the anchoring-blocks. The ends of the

wall-slabs, the upper surfaces of the anchoring-blocks, and the raised portions thereon have projecting loops, through which connecting-rods and wires are passed. .The vertical spaces are then boxed in and concrete placed

in the boxing. When the concrete sets the wall-slabs are securely united, and also attached to the anchoringblocks; besides which, vertical courses or pillars of reinforced concrete are provided at intervals in the walls.

Concrete Block Mould.. —A patent, No. 43,376, has been taken out by A. G. Youngson, builder, of Invercargill,

which is characterised by having sides and ends provided with means whereby on raising the ends of the box the sides and ends expand away from the block.

Concrete Block Mould. —A patent ? No. 44,942, has been taken out by R. H. May, of Hastings Street Extension, Napier. According to this invention, a moulding-frame of the required shape is constructed and hinged to a horizontal rod arranged in a suitable stand. The frame

is so arranged that the sides thereof may be placed in position and held therein while the concrete is being

placed therein. A palate-plate forming a top to the mould is then placed in position and held by special means. When the concrete is sufficiently set the mould is rotated upon the rod referred to and deposited in an inverted position upon a table at the rear of the device, means being provided whereby the palate-plate will lie upon the table in order to enable the block to be carried clear of the frame, a portion of the sides of which are removable so as to permit the moulded block to be clear of the frame.

Concrete Slab Mould. A patent, No. 45,369, has been taken out by Geo. Ogle, Liverpool Street, Auckland, which comprises a table on which a number of slabs are moulded on the flat in the positions relative to each other they will occupy when used. The surface of the table

is divided by rails at each side and cross-partitions between the rails. The edges, which will be horizontal when the slabs are used vertically, are formed by the cross-partitions, vyhich are shaped accordingly. Prefer-

ably inter-engaging, the fact that the meeting edges are formed on each side of the same partition ensuring fit in use, and room for grouting being placed between the edges. The vertical edges are formed by contact with the sides of sections on the inner sides of rails. The partitions are formed preferably by bending, etc., the metal plates which form the bottoms of the moulds. Core prints and means for holding same in place are provided, whereby holes can be formed and reinforcements held. The concrete is screeded level with the top of the rails, and compressed by a heavy roller running along the latter.