. American engineer and railroad journal . into place, which forms a bearing for the eccentric rodbrass. This method of fastening the crank to the main pin per*mits it to be removed if desirable by simply driving out thesingle binding bolt. The eccentric rod is wrought iron and is fitted at the backend with a split brass bearing arranged with a wedge and ad-justing screw for taking up wear. The forward end is in theform of a jaw for connection to the bottom of the link. Thisconnection is made by a I-H in. pin. with taper fits in the rodand a counter sunk head on the inner side. The pin and the
. American engineer and railroad journal . into place, which forms a bearing for the eccentric rodbrass. This method of fastening the crank to the main pin per*mits it to be removed if desirable by simply driving out thesingle binding bolt. The eccentric rod is wrought iron and is fitted at the backend with a split brass bearing arranged with a wedge and ad-justing screw for taking up wear. The forward end is in theform of a jaw for connection to the bottom of the link. Thisconnection is made by a I-H in. pin. with taper fits in the rodand a counter sunk head on the inner side. The pin and thebushing in the link extension into which it fits are both casehardened. The link itself is made of hammered iron and casehardened, and is carried between two cast steel carriers, whichhave 34 in. trunnions fitted with case hardened bushings shrunkon and pinned to place. These trunnions rest in a cast steel bear-ing of special design, which fits between and is supported by twoV/z x 6 in. rolled iron plates extending between the guide yoke. WALSCHAERT VALVE GEAR OX PACIFIC TYPE I i I MOTIVE. and the extension of a special frame cross tie located betweenthe first and second pair of drivers. These plates are set atI2J4 in- centers and form a very rigid support for all of the mainmembers of the gear. The reverse shaft is carried in bearings fastened between andto these plates at their connection to the frame cross tie. Thisbearing, which is shown in detail, is fitted with a cap held inplace by two bolts, permitting the easy removal of the shaft. Thereverse shaft arms are of cast steel in two parts, so constructedthat the outer section of the arm can be removed without dis-turbing the shaft or inner arm. A block, having a sliding fit on 90 AMERICAN ENGINEER AND RAILROAD JOURNAL. the square end of the radius bar, is fitted with trunnions whichseat in the bearings of the reverse lever arm. The radius bar itself is made in two parts, which are securedtogether just ahead of the link by t
Size: 2095px × 1192px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
