. Railway age gazette . d with the ordinary designof Walschaert gear. It also simplifies the construction, allowseasy standardization, and materially reduces the weight of thewhole gear. As will be seen by reference to the ilhistration, the com- is such that when one radius bar is lowered the other is balances the two gears for reversing, without the use ofa counterbalance spring. The radius rod and the connectionfrom the top of the combination lever both join a short link,the end of which is connected directly to the valve stem cross-head. The link, combination lever and reverse b
. Railway age gazette . d with the ordinary designof Walschaert gear. It also simplifies the construction, allowseasy standardization, and materially reduces the weight of thewhole gear. As will be seen by reference to the ilhistration, the com- is such that when one radius bar is lowered the other is balances the two gears for reversing, without the use ofa counterbalance spring. The radius rod and the connectionfrom the top of the combination lever both join a short link,the end of which is connected directly to the valve stem cross-head. The link, combination lever and reverse bell crank have acommon fulcrum on either side and the bearings for both of theshafts extending across the locomotive are contained in the samecasting which is supported by a frame cross-tie. A number of ellipses have been made with this gear on thevalve gear model at the Schenectady plant of the AmericanLocomotive Company. The model was arranged for a valvetravel of 8J^ in., which was secured with a 42 deg. angle of the. ^Ryhf Main Pin The Young Locomotive Valve Gear Is Driven Entirely by the Crossheads bination lever which gives the valve its lap and lead movement,the same as in the Walschaert gear, is located some distanceback of the crosshead and is keyed to a shaft which extendsacross the frames. On the opposite end of this shaft the link iskeyed and gives the travel to the valve on that side. It w^illthus be seen that the connections to the crosshead on the rightside of the locomotive provide for the lap and lead movement ofthe valve on tlie same side and the movement of the link whichgives the travel to the valve on the opposite side. The same ar-rangement applies for the other side. Reversing is effectedthrough a bell crank on either side that moves the radius rodby means of a block in a slotted opening. There are two reachrods, one for each side of the locomotive, and the arrangement link and an 18 in. link block lift. For a 9 in. travel the linkangle would be 47 deg. I
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
