. The story of the exposition; being the official history of the international celebration held at San Francisco in 1915 to commemorate the discovery of the Pacific Ocean and the construction of the Panama Canal. THE 20,000-HOESE-POWEE TURBINE. STORAGE-BATTERY TRUCKS WATER AND ELECTRICITY i79 The important thing about this wheel was that it was equipped with anoil-pressure governor and the latest pattern of water-economizing needlenozzle and relief valves; for two of the serious problems of the hydro-electricengineer were regulation of speed under fluctuating loads, and water econ-omy under th
. The story of the exposition; being the official history of the international celebration held at San Francisco in 1915 to commemorate the discovery of the Pacific Ocean and the construction of the Panama Canal. THE 20,000-HOESE-POWEE TURBINE. STORAGE-BATTERY TRUCKS WATER AND ELECTRICITY i79 The important thing about this wheel was that it was equipped with anoil-pressure governor and the latest pattern of water-economizing needlenozzle and relief valves; for two of the serious problems of the hydro-electricengineer were regulation of speed under fluctuating loads, and water econ-omy under the same conditions without producing excessive pressure from surges. The governor and needle-nozzle operation was shown m an electric-lighted case with windows in it so that you could see what was going on—the heavy gush of the jet as the load increased, the deflection of part of itas the load lightened, the turning of it back to the wheel again as more loadcame on, all working automatically. The wheel operated a 75- ^^^„^^^ direct current generator made by the General Electric jj^^^i Company of Schenectady. An assembled nozzle was shown,standing still, designed to operate under a head of 1,450 feet and control ajet capable of g
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Keywords: ., bookcentury1900, bookdecade1920, bookidstoryofexpos, bookyear1921
