. Elements of transportation, a discussion of steam railroad electric railway, and ocean and inland water transportation . The Quadruple-Expansion Inverted Direct-Acting Marine Engine. who applied to the steam engine tlie principle that hadlong been used in constructing water wheels. The follow-ing brief descrii)ti()n of Parsonss turbine is given in thevolume i)ul)lished by the United States Census of 1902(vol. X, Part 4, page 307) : THE STEAMSHIP 215 Tlio Parsonss type of turbine lins a series of disksluouiitcd upon a coninion shaft, and alternating with paral-lel blades fixed within the casi
. Elements of transportation, a discussion of steam railroad electric railway, and ocean and inland water transportation . The Quadruple-Expansion Inverted Direct-Acting Marine Engine. who applied to the steam engine tlie principle that hadlong been used in constructing water wheels. The follow-ing brief descrii)ti()n of Parsonss turbine is given in thevolume i)ul)lished by the United States Census of 1902(vol. X, Part 4, page 307) : THE STEAMSHIP 215 Tlio Parsonss type of turbine lins a series of disksluouiitcd upon a coninion shaft, and alternating with paral-lel blades fixed within the casing of the shaft. There arebuckets or cups, upon both the revolving disks and thefixed blades, the fixed buckets being reversed in relationto the moving cups. The steam, admitted first through a. OxE OF THE Turbines of the Governor Cobb. The low-pressure andastern rotor in place in the stater. The upper half of the stator issuspended to show the arrangement of the blades upon rotor andstator. set of stationary blades or buckets, impinges at an angleupon the first rotating disk and imparts motion, passingthence through another set of fixed blades to the seconddisk upon the main shaft, and thus through the entireseries of alternately fixed and rotating buckets. The areaof the passages increases progressively to correspond with 216 ELEMENTS OF TRANSPORTATION the expansion of the steam as it is used on the successivedisks/ By studying the illustration it will be seen that thepropeller shaft is encircled by a series of closely placedrims on the edge of each of which are small disks or blades,against which the steam expands under high pressure, thuscausing the shaft to revolve. The pressure of steam in
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttranspo, bookyear1920
