File:American engineer and railroad journal (1893) (14572761190).jpg

Identifier: americanengineer68newy (find matches)
Title: American engineer and railroad journal
Year: 1893 (1890s)
Authors:
Subjects: Railroad engineering Engineering Railroads Railroad cars
Publisher: New York : M.N. Forney
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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finishedat the after end by a composition cap bolted on water-tight,the bosses and caps being finished all over. In addition to themain engines there are turning engines and gear in each en-gine-room. This consists of a single engine for turning themain engines, which works under a steam pressure of 150 lbs.The cylinder of this engine is 4A in. in diameter and 6 in.stioke ; it drives by a worm gearing a second worm whichmeshes in with the worm wheel on the propeller shaft, theworm wheel of each engine being fitted on the flange couplingat the after end of the ciank shaft. Piston valves arc alsoused on these turning engines, and they are made reversible bymeans of a change valve moved by a screw and hand-wheel.The turning wheels are of cast steel with cut teeth, and theshafts and worms are of forged steel. It is, of course, unnecessary to recapitulate the gauges andvalves which are used on the boilers and engines for indicatingsteam pressure, vacuum, height of water, etc. Thermometers
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< O< a a a PS o H 3z,w PS ao S5 M <1 M P* Vol. LXVIII, No. 8.) AND RAILROAD JOURNAL. 361 are placed at all points where it is necessary that the tempera-ture of the water should be known, ami revolution counters ofthe continuous rotary type are added to register from 1 to1,000,000. In addition to this there are revolution counterswhich specifications demand should not be Influenced bychanges in the temperature, the vibration of the engines, orthe motion of the vessel. Tell-tales are fitted on the bridgeand in the conning-tower to show the direction of the revolu-tion of the main engines, and in addition to this there is alepeating telegraph connecting the dials on the working plat-form with those of the conning-tower, wheel-house and bridge.Speaking-tubes connect each engine-room with each fire-roomand with each other, the fire-rooms with each other, and eachengine-room with the pilot-house, conning-tower, bridge andchief engineers room. Exch fire-room is also connected witht

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