. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. , in August, 1825, a patent for a machine for making oconsiderable number of bricks at one operation. It consists, inthe first place, of a cylindrical pug-mill of the kind usually em-ployed for comminuting clay for bricks and tiles, furnished withrotatory knives, or cutters, for breaking the lumps and mixingthe clay with the other materials of which bricks arc commonlymade. Secondly, of two moveable moulds, in each of whichfifteen bricks are made at once; these moulds being made tot
. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. , in August, 1825, a patent for a machine for making oconsiderable number of bricks at one operation. It consists, inthe first place, of a cylindrical pug-mill of the kind usually em-ployed for comminuting clay for bricks and tiles, furnished withrotatory knives, or cutters, for breaking the lumps and mixingthe clay with the other materials of which bricks arc commonlymade. Secondly, of two moveable moulds, in each of whichfifteen bricks are made at once; these moulds being made totiavel to and fro in the machine for the purpose of being alter-nately brought under the pug-mill to be fitted with the clay,and then removed to situations where plungers are enabled toact upon them. Thirdly, in a contrivance by which the made to descend, for the purpose of compressing the mate-rial and discharging it from the mould in the form of bricks. of constructing and working trucks which carry the receiving 176 Fourthly, in the nvlli boards, and condaci the bricks away as they are formed. BRICK. 153 Fig. ni exhibits the general construction of the apparatus; both ends of which beingexactly similar, little more than half of the machine is represented, a is the cjliadricalpug-mill, shown partly in section, which is supplied with the clay and other materialsfrom a hopper above; b b, are the rotatory knives or cutters, which are attached tothe vertical shaft, and being placed obliquely, press the clay down toward the bottom ofthe cylinder, in the act of breaking and mixing it as the shaft revolves. The lower partof the cylinder is open ; and immediately under it the mould is placed in which the bricksare to be formed. These moulds run to and fro upon ledges in the side frames of themachine; one of the moulds only can be shown by dots in the figure, the side rail inter-vening : they are situated at c c, and are formed of bars of iron crossing each other,and encom
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Keywords: ., bookcentury1800, bookdecade1840, booksubje, booksubjecttechnology
