. The Practical brick and tile book. ART OF MAKING BRICKS AXD TILES. 221 machine, which combines the crushing rollers, pug-mill, and brick-forming in one machine. These machines are largely run upon, and have beenemployed extensively by our great contractors, andupon many public works—facts which give the bestassurance that they answer well. One of these machines weighs about 3^ tons, and ofthis second size, with about 8 or 10 horse power, willturn out from 75,000 to 90,000 bricks per week. We now come to another class of machines working Fig. with plastic clay, though capable of employin
. The Practical brick and tile book. ART OF MAKING BRICKS AXD TILES. 221 machine, which combines the crushing rollers, pug-mill, and brick-forming in one machine. These machines are largely run upon, and have beenemployed extensively by our great contractors, andupon many public works—facts which give the bestassurance that they answer well. One of these machines weighs about 3^ tons, and ofthis second size, with about 8 or 10 horse power, willturn out from 75,000 to 90,000 bricks per week. We now come to another class of machines working Fig. with plastic clay, though capable of employing claynearly dry, or at least very stiffly tempered. Themachine shown in fig. 10 consists of a vertical pug-mill,into the upper part of which the clay is fed, and inwhich it imdergocs tempering and mixing, and, on 222 RUDIMENTS OF THE reaching tte bottom of the mill, is pressed into themoulds, of the form and size of brick required, whichare arranged in the form of a circular revolving this table revolves, the piston-rods of the mouldsascend an inclined spiral plane, and so gradually lift thebricks out of the moiilds, whence they are taken from themachine by a boy, and placed on an endless band whichcarries the bricks direct to the waller. The speed of theseveral parts is so arranged, that the operations ofpugging, moulding, and delivery proceed simultane-ously in due order, the whole being easily driven by asteam engine of about 6-horse power, which, at theordinary rate of working, will make 12,000 bricks perday; or with 8-horse p
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbr, booksubjectbricks
