. Railway mechanical engineer . ns of fulcrum F. The movement of pin B is trans-mitted directly to the long vertical lever and thus to pin D,attached valve stem and the main air valve. Movement ofthe main valve to the right admits air behind the piston,moving crosshead C, to the right on its guide G. With pinsP and B stationarj crosshead C continues to move to theright until backward movement of pin D and the main valveto the left closes the port. In the main, the results accomplished by this test are first,the determination that all gaskets, packing, etc., in the gearare air-tight; second, th
. Railway mechanical engineer . ns of fulcrum F. The movement of pin B is trans-mitted directly to the long vertical lever and thus to pin D,attached valve stem and the main air valve. Movement ofthe main valve to the right admits air behind the piston,moving crosshead C, to the right on its guide G. With pinsP and B stationarj crosshead C continues to move to theright until backward movement of pin D and the main valveto the left closes the port. In the main, the results accomplished by this test are first,the determination that all gaskets, packing, etc., in the gearare air-tight; second, the gear operates as designed, depend-ing upon the movement of pin P; and, third, that there is nodefect or leak around the main valve, causing the crossheadC to creep in either direction when pin P is still. The dismantling and assembling of Duplex stokers pre-sents a problem which has Ijcen solved by the constructionof a special hydraulic press as indicated in Fig. 2. Thepres^ consists of two rails PR separated a short distance. Fig. 2—Reattembling an Elevator Scr Casing and Revolving HcncI of .1 Duplex Stoker herever possible, test all parts before they leave the de- irtment for application to the locomotive. In this way a Ti-at deal of time and lalior is saved by making sure that no fiart aryc^ to the locomotive until it is in gofxi fjfKjrating ron- witii the adjustable tail casting T mounted on one end of therails and head casting // on the other end. A fluidpressure jack is mounted firmly on licad // and arranged tobe driven through a small pumj) and air motor M. Gage RAILWAY MECHANICAL EXGIXKKR Vol. 96, No. 3 G is provided to register the mounting pressure. 1 he .spring5, through suitable levers, returns the plunger of the jackafter the parts have been forced together. This spring alsoacts as a buffer to absorb the shock when two parts arefinally separated. The head and tail castings are tiedtogether along the top by means of bar B, the design that tai
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
