. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ases, be con-siderably less than what is usually pro-\ided on many of the modern hea\-y lo-comotives, and results in practice bequite satisfactory. But it occasionallyhappens that a hose bursts, the trainparts, or an emergency application is re-quired under which conditions the brakepipe is entirely depleted. It is underthese circumstances that the large ca-pacity reservoir performs a most im-portant service, as. after the bursted hosehas been replaced, the train recoupled,or the emergency ha
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ases, be con-siderably less than what is usually pro-\ided on many of the modern hea\-y lo-comotives, and results in practice bequite satisfactory. But it occasionallyhappens that a hose bursts, the trainparts, or an emergency application is re-quired under which conditions the brakepipe is entirely depleted. It is underthese circumstances that the large ca-pacity reservoir performs a most im-portant service, as. after the bursted hosehas been replaced, the train recoupled,or the emergency has passed, which-ever it may be, the brake pipe may be 510 RAILWAY AND LOCOMOTIVE ENGINEERING November, igoj. almost instantly recharged to a pressure the same pressure in the line and on the sufficiently high to release all brakes left side of the diaphragm, promptly, and thus allow the train to pro- The pressure in chamber B will pass ceed quickly. Time being the most im- through pin-hole h in the piston to cham- portant element in successful railroading, ber C, thence through port g to the small. right engaging and unseating escapevalve 20, thus permitting the accumulatedpressure in port g and chamber C toescape. This escape of pressure emptieschamber C, and the pressure in chamberB, on the opposite side of the piston, willforce the piston and slide valve to theextreme right, cutting ofif communicationbetween the main reservoir and port e,which supplies the line and the dia-phragm chamber. Fig. 2 shows the operative parts in theclosed or inoperative positions. When,through leakage or use of pressure in theline, the pressure is reduced in ports eand f lower than the resistance of theregulating spring i6, piston 15 will moveto the left, allowing escape valve 20 toseat, and the feed of pressure fromchamber B. through pinhole h into cham-ber C until the pressure of both side ofthe piston become equalized, when spring9 will force the piston and slide valve tothe left, again openin
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
