. Locomotive engineering : a practical journal of railway motive power and rolling stock . Fig 12. 690 / sive stages of development to the finisheddesign. While the cams of the pull-up camtype ot tliis brake arc arranged to movein the opposite direction from the push-down, the same rules are applicable. ^ 4i kAir-Pump Exhaust Muffle and Lubri-cating Attachment. Editors : Noting inquiry from D. A. S., LasVegas, N. M., and your reply in Aprilnumber, relative to air-pump be-ing cut into exhaust channel of locomo- LOCOMOTIVE ENGINEERING. air pump, thus preventing the heating ofcylinders b
. Locomotive engineering : a practical journal of railway motive power and rolling stock . Fig 12. 690 / sive stages of development to the finisheddesign. While the cams of the pull-up camtype ot tliis brake arc arranged to movein the opposite direction from the push-down, the same rules are applicable. ^ 4i kAir-Pump Exhaust Muffle and Lubri-cating Attachment. Editors : Noting inquiry from D. A. S., LasVegas, N. M., and your reply in Aprilnumber, relative to air-pump be-ing cut into exhaust channel of locomo- LOCOMOTIVE ENGINEERING. air pump, thus preventing the heating ofcylinders by friction, yet keeping the cyl-inders warm, while wholly mufHing theobjectionable noise of the air-pump ex-haust and destroying force draft, so dam-aging to fireboxes, flues, etc., and avert-ing unnecessary consumption of coal. Fig. I represents a view, part in sideelevation and part in section taken at lineA—B, Fig. 2, showing location of returnexhaust and air-pump connection. Fig. 2 represents a transverse sectiontaken on line C—D, Fig. i, looking toright. ^ 4 ^ IS \\ h V Fig. J. exhaust ports of the steam chest with thesmokestack; f the air-pump; g the air-pump steam-exhaust pipe. In the ordinary construction of loco-motives the exhaust pipe of the airpump is connected directly with thesmokestack, thereby creating a forcedraft on the fire when air pump is inoperation, thus consuming unneces-sary fuel when engine is at rest orrunning down grade. If fuel is not sup-plied, cold air is drawn through grates,causing unequal expansion and contrac-tion, with damaging elTcct to boiler, andforce draft is not desired. Said draft alsocauses an objectionable discharge ofsmoke and cinders from stack while en-gine is at rest in or at a station or otherlocality. Exhaust also creates an objec-tionable noise. To avoid the objections mentioned,and to derive the advantages de-tailed further on, the air-pump exhaustg is extended, by means of suitable bentpipes and connections through Y It,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
