File:A textbook on the locomotive and the air brake (1901) (14572257390).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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controlled by a set-screw. The end of the screw projects into this slot, and byscrewing in and out can be made to decrease or increase thepassage for drainage at will. By opening the valve full, anyobstruction may be blown out, and when closed the setscrewcan vary the opening in the seat and thus secure all the advan-tage of the trap shown in Fig. 31. Another feature of impor-tance is the drip fitting d which connects with the steam pipeF; it will be perceived that as long as steam is on, a portion ofit gets into the drip and so prevents any freezing of the con-densation at that point. 88. Hot-Water Piping.—To follow the course of thecirculation in the piping, start at the heater S: Water risesfrom the top of the heater coil up through riser R to drum D,whence it comes down through p, then along the car and acrossthrough pipe / and into the heater end of jacket J. Thepipe I runs into / through the fitting c which connects withthe header e; this together with header e enables the two
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74 CAR HEATING. § 13 copper pipes j to form a circuit. Thus, water comes inthrough /, flows along and back through pipes j and outagain through c (around the outside of I this time), whence itascends and runs along the lower pipe p to the end F of thecar; it turns at g and comes back through upper p, crossesthe car through pipe S and into the heater end of jacket J,thence along and out at the far end and across the carthrough 3. Then it ascends and runs to end F of car, makesthe bend / and returns, drops down and crosses the car bypipe 4- and enters the non-heater end of jacket / by meansof fitting k) passes around a circuit / similar to the oneat the other end of the jacket, and then through pipe 5 tothe other side of car, where it goes to the end L, turns at gand comes back through upper p and crosses by pipe 6,entering drum at non-heater end, passing through along 6and out through 6, and back through left upper p to theheater coil, and ascending and passing out at the top intothe

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