. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . HOMESTEAD liLOW-OI-F V.\LVE. istics, and they should regulate the speedto suit the conditions. The engineer whocan make the required time, and at thelowest maximum rate of speed, is the manwho excels as a runner, and to accomplishthis it is necessary to get the train quick-ly in motion after stops, maintain re-quired speed to reach the next stop atthe proper time, and do all that restswith him to do to reduce delay at sta-tions to the lowest possible limit. Locomotive Blow-Off Homes
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . HOMESTEAD liLOW-OI-F V.\LVE. istics, and they should regulate the speedto suit the conditions. The engineer whocan make the required time, and at thelowest maximum rate of speed, is the manwho excels as a runner, and to accomplishthis it is necessary to get the train quick-ly in motion after stops, maintain re-quired speed to reach the next stop atthe proper time, and do all that restswith him to do to reduce delay at sta-tions to the lowest possible limit. Locomotive Blow-Off Homestead locomotive blow-offvalve is used on many of the largerailroads in the country. It is alsolargely used in stationary work foreither water, steam or air. The loco-motive blow-off valve is made on thesame principle as the straightway ■^^ E AjAT. MAY 2 6,96>/SECTION OF BLOW-OFF \ALVE. valve. It will be seen that when thepressure passes through this valve thatthe seat is protected from wear. Tlievalve is so constructed that when itis closed it is at the same time forcedfirmly to its seat. This result is se-cured by means of the traveling camthrough which the stem passes. Thecam is prevented from turning with thestem by means of lugs which movevertically in slots. Supposing the valveto be open, the cam will be in the lowerpart of the chamber in which it isplaced and the plug will be free andcan be easily moved. A quarter of aturn in the direction for closing itcauses the cam to rise and take a bear-ing on the upper surface of the cham-ber, and the only effect of any furthereffort to turn the stem in that direc-tion is to force the plug more firmlyto the seat. A slight motion in theother direction immediately releaseseasily, being arrested at its proper openposition by contact of the fingers ofthe cam at the other end
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
