Patent GB-254855-A (GB)
Title: Improvements in or relating to shuttering and accessories for the erection of buildings and the like
IPC: E04G11/14
Filed: 1925-05-25
Abstract: 254,855. Bendall, R. L. May 25, 1925. Casting and moulding in situ.-Relates to shuttering for moulding concrete and like walls and other structures in situ, and consists mainly in a special construction of uprights used in a shuttering system comprising a series of front uprights A, a series of similar rear uprights, clips G for holding the shutters B in position against the uprights, and means, such as spacers F, for holding the front and rear series in parallelism. Each upright consists of a metal tube of circular cross-section, having a plate a tangentially disposed on its inner portion to receive the ends of the shutters, longitudinally aligned slots and holes a<1>, a<2>, or a continuous slot being formed in the outer portion of the tube. These holes serve for adjustably attaching to the uprights headed bolts E provided with wing nuts. Some of these are used, as shown in Fig. 4A, for the purpose or holding in position the clips G which clamp the shutters B against the flange-plates a. Other bolts E pass through holes in angle-irons D which lie horizontally and brace the uprights in the same series together. Spacers F, consisting of stamped metal plates formed with two hooked portions at each end, may be used as shown in Fig. 1 to connect opposing uprights by engaging the flange plates. These spacers may be shifted up or down during the progress of the casting. In a modification, the member connecting the hooked ends of the spacer F, instead of being integral therewith, is formed as a detachable rod. As a further alternative, the spacing device for connecting opposed uprights consists of a rod N, Fig. 9, passing through holes in the flange-plate and in the tubular body A, each end of the rod being clamped by a screw O<1> in a sLeeve O. The screw also grips a bolt P which passes through the sleeve O and has cranked ends, one of which engages inside the upright A. The rods N may also pass through the bracing bars D, to hold them in position. The ends of the shutters are rabbeted or grooved vertically, and each end may be formed as shown in Fig. 4A with grooves b<1>, b<2> of different depths on opposite edges, the depth of the grooves b<1> being equal to the thickness of the flange-plates a, and that of the grooves b<2> being greater. By this means the shutters may either be placed so that the shallow grooves engage with the plates a, or reversely, so that in the one case a flat wall is produced, and in the other case vertical panels, ribs, or the like are moulded on the walls. By a suitable arrangement of the shutters, horizontal beam-like projections, window-sills, or the like may be formed. The shutters are preferably formed of steel-faced wood and the faces may have any desired pattern or marking. Spigot members fitting telescopically into the uprights may be used to connect the uprights in vertical alignment. Angled metal plates are bolted to the shutters to form corner joints, fillets being fitted into the spaces immediately behind the angles of these plates. To cast a wall with an internal cavity, a shutter K constructed as shown in Fig. 8 may be employed as a core. This comprises two wedge shaped panels k hinged together at their upper edges, and an intermediate wedge k<2> adapted to be raised and lowered by means of screws k<3> and nuts k'.