. Cassier's magazine . -VIBROMETER SCREEN USED FOR SIZING SMALL COAL FOR HARDY PATENT PICK COMPANY MADE BY screen to have a gyratory movement,the radius of gyration being de-pendent on the velocity of rotation ofthe pulley and the position and mag-nitude of the unbalanced to the movement and the in-clined surface of the screen, parti-cles placed on it will descend, de-scribing on the way a series ofellipses over a large area of thescreen, giving a very satisfactory re-sult in screening. Due to the tendencyto automatic balancing, very little power is re
. Cassier's magazine . -VIBROMETER SCREEN USED FOR SIZING SMALL COAL FOR HARDY PATENT PICK COMPANY MADE BY screen to have a gyratory movement,the radius of gyration being de-pendent on the velocity of rotation ofthe pulley and the position and mag-nitude of the unbalanced to the movement and the in-clined surface of the screen, parti-cles placed on it will descend, de-scribing on the way a series ofellipses over a large area of thescreen, giving a very satisfactory re-sult in screening. Due to the tendencyto automatic balancing, very little power is required to drive the screen,and no vibration is produced. It canbe driven at a high speed, the pulleymaking from 200 to 350 revolutionsper minute. The width of thescreen shown is 4 feet and length 11feet. Neither of the screens just de-scribed is suitable for separatingsizes below %-inch mesh, becausethe screen becomes choked. The Callow screen, as made byMessrs. Fraser & Chalmers, Ltd., 6i6 CASSIERS MAGAZINE can screen satisfac
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyork, booksubjec
