The wonders of modern mechanismA résumé of recent progress in mechanical, physical, and engineering science . at they do faster work, and a completemachine has an automatic feeder that carries the ore regu-larly across its face. For certain classes of work therehas been a demand of late for the belt-driven class of rolls,operating entirely without geared connections between thecrushing shafts, which are independently driven by beltsrun on large pulleys. The speed is higher, and the beltsdo not wear out as fast as the gears, which are subject tosevere friction. Under some circumstances complete
The wonders of modern mechanismA résumé of recent progress in mechanical, physical, and engineering science . at they do faster work, and a completemachine has an automatic feeder that carries the ore regu-larly across its face. For certain classes of work therehas been a demand of late for the belt-driven class of rolls,operating entirely without geared connections between thecrushing shafts, which are independently driven by beltsrun on large pulleys. The speed is higher, and the beltsdo not wear out as fast as the gears, which are subject tosevere friction. Under some circumstances complete pulverization of theore is desired, and for this purpose no machine has beenas successful as the Huntington mill. This makes use of 270 WONDERS OF MODERN MECHANISM. upright rolls, having an oiled bearing above, away fromthe grit and slime, and no bearings at all below, as therolls run around on a horizontal steel tire. This arrange-ment gives the mill great wearing qualities, not possiblein any mill where tlie slimes have a chance to work intothe bearing. The accompanying illustration shows the Fig. THE HUNTINGTON SHLL. operation of the Huntington mill, as built by Fraser &Chalmers. The ore and water are both received at thehopper on the right. The rotating rolls, 7 and 9, throwthe ore against the ring-die 1, being kept to their work ofcrushing by the centrifugal force. Complete pulverization ORE-CONCENTRATING MACHINERY. 271 can be obtained. It will be observed that the only oiledbearings are on the three shafts, set in the in)|)er lower surface and the weight of the rolls all assistin the pulverization, giving most economical results. Theends of a screen are shown in the part broken away, andtiirough this the water and pulverized ore find exit, noore being permitted to escape until of the required finenessof the screen. The discharge is so perfect that very littleslime results, the pulp being in good condition for concen-tration. One more crushing machine sho
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Keywords: ., bookcentury1800, booksubjectmachinery, booksubjectmechanicalengi
