File:A textbook on the locomotive and the air brake (1901) (14572316248).jpg

Identifier: textbookonlocomo02inte (find matches)
Title: A textbook on the locomotive and the air brake
Year: 1901 (1900s)
Authors: International Correspondence Schools
Subjects: Locomotives Locomotive boilers Locomotives Railroad cars
Publisher: Scranton, Pa., International textbook co
Contributing Library: Northeastern University, Snell Library
Digitizing Sponsor: Northeastern University, Snell Library

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Text Appearing Before Image:
. Fig. 35 shows the piping and fittings used in the comminglersystem. Steam is taken from the train pipe P at the fitting t,whence it passes through pipe P to the side of the car and runsto the heater end, where it turns upwards until it reachesfitting t; thence it passes the dial cock c and ascends to apoint about level with the top of the expansion drum,making the turn at / and descends to the commingler C, justbefore reaching which it passes through the strainer j. Enter-ing the con^mingler, it mixes with the water, as hereafterdescribed; the heated water leaves the top of commingler Cand goes through the riser R into the expansion drum D.From the drum it descends through the downflow pipe p andmakes the circuit of the car as indicated by the arrows. Thesteam crosses the car through pipe 1 and recrosses it on itsreturn through pipe ^, entering the bottom of the heater coilat d^ passes up through the coil and out at d into the bottomof the commingler, and thence into the drum again.
Text Appearing After Image:
§13 CAR HEATING. 79 In this system there is a continual addition being madeto the amount of water in circulation, owing to the con-stant condensation of steam in the commingler, as a resultof which the drum D gradually fills. When the water in itrises to a certain height, it overflows into the pipe o, throughwhich it passes down and along the car to the fitting t inthe train pipe, and thence out through the drip pipe. As theconnection for the drip pipe is close to the live steam in t,the drip cannot freeze. Water is kept from running back from the drum to the trainpipe, when changing engines or when using fire instead of steam,by carrying the pipe P above the level of the water in the drumand then bringing it down again to enter the commingler. Inthe fitting, j is a swing check-valve opening toward the com-mingler, thus preventing the water passing back from the latterup pipe P and so to the train pipe. So, also, if the train wereto part or the train pipe become uncoupled, the pressu

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