. Cassier's magazine . ter issuingthrough the perforations at a highpressure play on the outside of themeshes and clear them of any finecoal. VIBROMETER A screen very suitable for sizingdry small coal for a washing estab-lishment is the Vibrometer screen,made by Messrs. Hardy Patent PickCompany. The vibrometer consistsof an incline screening surface se-cured in a frame freely suspended byfour wire ropes held in clamps onthe sides of the screen and the fram-ing above, as shown in Fig. 6. Overand above the screening surface is asteel box, which contains an unbal-anced weight W, which can be fixe
. Cassier's magazine . ter issuingthrough the perforations at a highpressure play on the outside of themeshes and clear them of any finecoal. VIBROMETER A screen very suitable for sizingdry small coal for a washing estab-lishment is the Vibrometer screen,made by Messrs. Hardy Patent PickCompany. The vibrometer consistsof an incline screening surface se-cured in a frame freely suspended byfour wire ropes held in clamps onthe sides of the screen and the fram-ing above, as shown in Fig. 6. Overand above the screening surface is asteel box, which contains an unbal-anced weight W, which can be fixedin any position on an arm keyed tothe spindle 6\ The spindle works inbearings fixed in the box, and has itsupper end united to a vertical jointedrod /. The upper end of the rod isunited through a similar joint to aspindle O, which carries a pulley the pulley is rotated the end ofthe spindle in the foot bearing willdescribe a circle in a horizontal plane,and the unbalanced weight causes the COAL WASHING aflc 615.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyork, booksubjec
