. Elements of technology :. 34 26G OF THE MOVINQ FORCES USED IN THE ARTS. presented in Fig. 10. Fig. 10. This method is said to bein common use on thecontinent of Europe, andbut seldom employed inEngland. It is a disad-vantageous mode of ap-plying power, and is onlyrecommended in corn-mills by its simplicity, themillstones being turned directly by the axis of the water wheel,without the intervention of other wheels, or gearing. In thesame manner another kind of tub wheel, which is a sort of in-verted cone furnished with spiral floats on its inside, is made torevolve horizontally, by dischargin
. Elements of technology :. 34 26G OF THE MOVINQ FORCES USED IN THE ARTS. presented in Fig. 10. Fig. 10. This method is said to bein common use on thecontinent of Europe, andbut seldom employed inEngland. It is a disad-vantageous mode of ap-plying power, and is onlyrecommended in corn-mills by its simplicity, themillstones being turned directly by the axis of the water wheel,without the intervention of other wheels, or gearing. In thesame manner another kind of tub wheel, which is a sort of in-verted cone furnished with spiral floats on its inside, is made torevolve horizontally, by discharging into it a current of waterfrom above. Barkers Mill—This machine, which is also sometimescalled Parents mill, is driven by an application of the force ofwater different from any of those which have been already de-. Fig. 11. 77Z scribed. This application con-sists, not in the direct use of theweight, or impulse, of water, butin that of its reaction, or counter ^pressure. The principle of thissimple machine may be seen byinspecting Fig. 11, where CD isa revolving vertical tube, carryinga millstone m on the upper partof its axis. At the bottom of thistube is a horizontal tube A B, atthe extremities of which are twoapertures A and B, opening inopposite directions. A stream of water is introduced from themill course above, and flows out at the apertures at A and B,and in this way keeps up a continued horizontal rotary motionaround the axis D m.
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Keywords: ., bookauthordukeuniversitylibraryjantzcoll, booksubjecttechnology
