. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . revolutions per min-ute to bring its velocit v of discharge to that of the vena cautracta under :!80 ft., althougha turbine of larger diameter, with small apertures, might undoubtedly be designed for thepurpose, like Mr. Foumeyrons celebrated turl)ine of St ^e. The Pelton wheel has proved especially efficient in the electrical transmission of power,and, as is illustrated in Fig. 16, may be placed directly on t
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . revolutions per min-ute to bring its velocit v of discharge to that of the vena cautracta under :!80 ft., althougha turbine of larger diameter, with small apertures, might undoubtedly be designed for thepurpose, like Mr. Foumeyrons celebrated turl)ine of St ^e. The Pelton wheel has proved especially efficient in the electrical transmission of power,and, as is illustrated in Fig. 16, may be placed directly on the dynamo shaft. The full-page illustration repre-sents an electriclighting station inwhich all the dyna-mos are driven liythese wheels. Asexamples of the useof the wheel fordriving dynamos,the following maybe noted: Thepower station of theAmerican RiverSyndicate is locatedat Rock Creek,Eldorado Countv,Cal. The plantconsists of an wheel,which, running un-der a head of 110ft. at 100 revolu-tions with a 5i-in. nozzle, has a maximum capacity of 130 horse power. To this wheel isconnected a 100 horse-power Brush generator, speeded at 900 revolutions, the current from. Fig. 16.—Direct driving of dynamo by Pelton wheel. WELDmCl, ELECTRIC. 901 which is carried to the mill through a single insulated copper wire, No. 3 B. & S. gauge,the return being made by a wire of the same size, making a four-mile circuit. The powerfrom the generator is communicated to the countershaft of the mill by a 70 horse-powerBrush motor running at 950 revolutions. The machinery operated consists of three centrif-ugal roller mills, a ten-stamp battery, and a rock breaker. The Pelton wheel under theseconditions shows an efficiency of 86 per cent., while about To per cent, of the power thusgenerated is available for duly at the mill. Sufficient power is taken from the main circuitto run sixty incandescent lamps for lighting the entire works. It only remains to be said that the modern turbine has bee
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
