. American engineer and railroad journal . pair of wheels; the cranked axle being of the built up type with a cast steel central web. i he Stephensontype of valve gear is used, the eccentrics necessarily being on therear driving axle. The link is located just back of the frontaxle and the rocker arm is so placed as to connect directly tothe link block. The top of the rocker arm extends over theframe so as to connect directly to the valve rod, which passesalong the top of the frame from this point to the 15-in. pistonvalve. This rod has a bearing in the guide yoke and is providedwith a knuckle
. American engineer and railroad journal . pair of wheels; the cranked axle being of the built up type with a cast steel central web. i he Stephensontype of valve gear is used, the eccentrics necessarily being on therear driving axle. The link is located just back of the frontaxle and the rocker arm is so placed as to connect directly tothe link block. The top of the rocker arm extends over theframe so as to connect directly to the valve rod, which passesalong the top of the frame from this point to the 15-in. pistonvalve. This rod has a bearing in the guide yoke and is providedwith a knuckle joint just back of this bearing. The frames are of cast steel 44 in. wide with single frontframes of wrought iron. The DeVoy type of trailer truck* isused, which employs a trailer truck frame of the slab form 2J4in. wide by 10 in. deep. The trailer truck boxes form part of asteel casting extending across the engine and are guided by ■ See American Engineer, April, 1905, pp. 135. January, 1908. AMERICAN ENGINEER AND RAILROAD JOURNAL. 37. kos£) LONGITUDINAL SECTION THROUGH BOILER. pedestals on the slab frame. The weight is transferred to theboxes through roller bearings. The brake cylinder has been placed in front of the cylindersand operates a push rod passing through a cored passage in thesaddle and connecting to an upright arm on the brake shaft. The construction of the boiler is quite clearly shown in theillustrations and is especially notable for its unusual depth oflirebox, particularly at the throat sheet. It will also be noticedthat three 2-in. openings have been provided through each of theside water legs just above the level of the fire. These will ad-mit considerable air from the outside and tend to improve com-bustion. A firebrick arch supported on four water tubes is to beinstalled. A single fire door 18 in. in diameter is provided. Theboiler contains 268 2j4in. tubes 19 ft. long, which give a heat-ing surface of about 3,000 sq. ft., which together with the fire-b
Size: 2282px × 1095px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
