A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . sed by flexible discs, or diaphragms of leather, c, which, when the machinosare filled with water, cause it to rise and fall tln-ough a certain space, by means of a hori-zontal vibratory motion, which they receive from an eccentric on a shaf^t, which is driveneither by a steam engine attached directly to it, or by a driving-belt and pulley, a. Coal. The action of the flexible diaphragms is similar to that of cylinders and pistons, whichare sometimes
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . sed by flexible discs, or diaphragms of leather, c, which, when the machinosare filled with water, cause it to rise and fall tln-ough a certain space, by means of a hori-zontal vibratory motion, which they receive from an eccentric on a shaf^t, which is driveneither by a steam engine attached directly to it, or by a driving-belt and pulley, a. Coal. The action of the flexible diaphragms is similar to that of cylinders and pistons, whichare sometimes substituted for them. Above the driving-shaft is a smaller one, B, which isdriven at a slower rate by means of toothed wheels, and gives by cranks or eccentrics ahorizontal motion backwards and forwards to sets of scrapers k, above the cisterns. Theseare so arranged as to remove the upper stratum of the sul)stanco being acted upon, and dis-charge it into wagons or other convenient rccei)tacles ; these up])er strata are of course thelightest, the heavier part settling upon the perforated jjlates below. 854 ORES, DRESSING When from the action of the machine a considerable quantity of material has accumu-lated upon these plates, the scrapers are thrown out of gear by means of apparatus attached,H II, and the stuff raked off, the operation being then continued on fresh supplies. Doors,G G, at the bottom of the machines, admit of any fine stuff which may pass through the per-forated plates being removed from time to time as may be necessary. These machines are in use for cleansing coal as well as other mineral substances. In such cases the heavier stuff which remains upon the plates consists of shale, pyrites,&c., very injurious substances in the manufacture of coke. One machine of two connectedcisterns, is capable of washing about thirty tons per diem of coal, but the quantity of min-eral work will depend upon the amount of ore present in proportion to the waste. The sizeo
Size: 2061px × 1212px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
