. American engineer and railroad journal . turbine has been established by nu-merous trials. For instance, with a turbine dynamoan effect of was obtained with a consumption lbs. of steam and lbs. of coal per hour and I am aware that in Williams on Heat in its Relations toWater and Steam, pp. 235-44, a theory is set forth whichapparently does not agree with that set forth in the foregoingdescription, but whether this disagreement be real or onlyapparent, the fact is that the statements contained herein arecorrect and based upon many carefully conducted tria
. American engineer and railroad journal . turbine has been established by nu-merous trials. For instance, with a turbine dynamoan effect of was obtained with a consumption lbs. of steam and lbs. of coal per hour and I am aware that in Williams on Heat in its Relations toWater and Steam, pp. 235-44, a theory is set forth whichapparently does not agree with that set forth in the foregoingdescription, but whether this disagreement be real or onlyapparent, the fact is that the statements contained herein arecorrect and based upon many carefully conducted trials ofsteam turbines provided with the various nozzles referred to,which trials have extended over a considerable period of timeand were made under widely different pressures. I claim as my invention— 1. The combination with a bucket or turbine wheel, of astationary nozzle opening adjacent to the wheel and havingits bore diverging or increasing in area of cross-section towardits discharge end, whereby the elastic fluid under pressure is. F I G. 4 muest point, a diameter of i; of an inch at its discharge end,and a length of 3 in., will expand steam of 165 lbs. pressureper square inch down to 3 lbs., and will produce a steam cur-rent of corresponding velocity. With a properly proportioned diverging nozzle, the steamissues from the nozzle in a compact jet, which has no tendencyto further expand or change its pressure or specific gravity,hence there is no tendency for the steam to leak at the sides ofthe wheel, but the entire jet is bodily thrown against thewheel and made effective in actuating the same. The steam current, issuing from the nozzle with little orno pressure, but great velocity, strikes the buckets of thewheel and revolves the latter at, an exceedingly high rate ofspeed, in many cases higher than 15,000 revolutions per min-ute. The practically complete conversion of the pressure of tin- steam into velocity and the utilization of the sis rim utthe swiftly moving curre
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
