File:The street railway review (1891) (14573466338).jpg

Identifier: streetrailwayrev07amer (find matches)
Title: The street railway review
Year: 1891 (1890s)
Authors: American Street Railway Association Street Railway Accountants' Association of America American Railway, Mechanical, and Electrical Association
Subjects: Street-railroads
Publisher: Chicago : Street Railway Review Pub. Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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ernor used for the high pressure.All cylinders and covers are jacketed andthe valves are fitted with balance pistons oncontinuations of the valve stems. The airpumps for these engines are driven from theintermediate crossheads by rocker arms andthe condensers are a part of the bed plates andhave the circulating water outside of the tubesin contact with the bed plate. All the bear-ings and slides are arranged for water circula-tion, the supply being taken from the injectorby a donkey pump, and the discharge fromeach bearing is in plain view from the back ofthe engine. The top platforms of these four (^Mmty\ailwayl^\ayl^ engines are connected by flying liridges so that there is acontinuous path for the oiler from one engine to another.On these engines the cranks arc at ijo and no fly-wheelsarc used, the Siemens & IlaUkc armatures serving as such. if ground return with an auxiliary wire so connected at thepower house as to he inside the circuit breakers and fused at the punand used :
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FIG. 5—1,300-H. 1. UNIT. The systenn of lubrication is very economical of oil, but50 gallons per month being used for the eight engines.Reservoirs are placed about the engines, from which theoil is fed to the bearings by means of wicks, as is the com-mon marine practice. The drip is returned to filters placedalongside the main supply tank, which is under the engineroom floor, and when filtered the oil is pumped into themain tank under an air jjressure of from 15 to 20 lbs.and thence carried to the reservoirs on the engines. The water for condensing is drawn fromSan Francisco bay at a point about 6,000 ft.from the station and delivered through a lineof 36-in. cast iron pipe. The pumping stationis equipped with two centrifugal pumps,driven by 150-h. p. G. E. motors. Thesemotors receive current from the power houseand are controlled by rheostats in the fieldand armature circuits. Only one motor isused the other being held as a reserve. Thewater is supplied under a pressure of aboutI 5

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