A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . scries of five or six bricks withthe greatest correctness by hand. Some of these machines have both boxes on one side,and the plungers worked by cranks. This machine cannot make bricks unless the clay haspreviously passed through rollers, if coarse; for any thing at all rough, as stone or otheriiard substance, would hang in the tongues of the die. But the clay being afterwardspugged in the machine, is so thoroughly tempered and mixed, that the bricks, when made,
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . scries of five or six bricks withthe greatest correctness by hand. Some of these machines have both boxes on one side,and the plungers worked by cranks. This machine cannot make bricks unless the clay haspreviously passed through rollers, if coarse; for any thing at all rough, as stone or otheriiard substance, would hang in the tongues of the die. But the clay being afterwardspugged in the machine, is so thoroughly tempered and mixed, that the bricks, when made,cannot be otherwise than good, provided they are sufiiciently fired. As to the utility ofhollow or perforated bricks, that is a matter more for the consideration of the architect orbuilder than for the brick-maker. Perforated bricks arc a fifth less in weight than solidones, which is a matter of some importance in ; but it takes considerably more powerto force the clay through those dies than for solid brick-making. In the manufacture ofperforated bricks, there is also a royalty or patent right to be paid to Mr. Mr. Chamberlains own machine is in principle as follows {fcj. ^1a):—The clay is fedinto a png-mill, ])laced horizontally, which works and amalgamates it, and then forces it offthrough a mouth-piece or die of about 05 square inches, or about half an inch deeper, andlialf an inch longer than is required for the brick, of a form similar to a brick on edge, butwith corners well rounded off, each corner forming a quarter of a 3-inch circle, for clay smoothly through an aperture thus formed, but not through a keen angle. After theclay has escaped from the mill, it is .seized by four rollers, covered with a porous fabric,(moleskin,) driven at a like surface sjieed from connection with the pug-mill. These rollersarc two horizontal and two vertical ones, having a space of 45 inches between them ; theytake this larger stream of rough clay, and press or
Size: 1950px × 1282px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
