. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . properly lubricated,with a feed valve in good condition, andby proper handling the necessity oflengthening cavity K will be illustration will show that in releas-ing after an automatic reduction it is im-possible to open the feed groove Vwithout opening the part H, I andW, thus releasing. If the piston shouldstop here with port K lengthened, port H (application cylinder air) only wouldIn- relieved, holding air in poru \\I to safety valve (not shown) S.
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . properly lubricated,with a feed valve in good condition, andby proper handling the necessity oflengthening cavity K will be illustration will show that in releas-ing after an automatic reduction it is im-possible to open the feed groove Vwithout opening the part H, I andW, thus releasing. If the piston shouldstop here with port K lengthened, port H (application cylinder air) only wouldIn- relieved, holding air in poru \\I to safety valve (not shown) S. , Mass. Old-Fashioned Pop : It is always interesting to look back atthe relics of other years when the locomo-tives were perhaps not one third of theirpresent proportions, but in their own wayand in their work were probably as effec- on the locomotives of the Cumberland andPennsylvania railroad in Alleghany coun-ty, Maryland. On the valve casing theare cast showing that patents weresecured on the contrivance in 1867, andalso in June and November, 1869. Wm B. Head, OLD-FASHIONED POP VALVE. tive as they are in regard to the workwhich they are expected to do to-day. Inregard to the smaller details it will befound that many of the modern improve-ments are not so radical after all, but rath-er an adaptation of old ideas to new con-ditions. The accompanying drawing shows thedetails of what was known as the Taylorand Cole pop valve, which may be ofinterest to your readers. The drawing ismade from an actual valve. It was one ofa large number that had seen long service Ignorance Concerning Air Brakes. Editor : 1 have been a constant reader of Rail-way and Locomotive Engineering andhave always had a keen interest in theAir Brake Department that you publisheach month. By its aid I have been ableto keep abreast with the constant changesand improvements that are being made inthe air brake apparatus. To my mindmany of the roads in the southeast donot keep u
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
