. American engineer and railroad journal . AIR-PUMPS YOU THE PKOPELLINU ENGINES OF TUB LMlKK STATES IIAITLKSII1P TEXAS. The tire-box is formed of side and back sheets having of rVm., and tube and crown sheets |-in. thick, thefront tube sheet is i in thick, and (he back head ,:,., in. Theurates have an area of sip ft. ; the healing surface olthe tire-box, deducting the sectional area of the tubes, the who were the contractors, we are now able to present illustra-tions and a description of the air pumps used in connectionwith the main engines. There are two single acting, vertic
. American engineer and railroad journal . AIR-PUMPS YOU THE PKOPELLINU ENGINES OF TUB LMlKK STATES IIAITLKSII1P TEXAS. The tire-box is formed of side and back sheets having of rVm., and tube and crown sheets |-in. thick, thefront tube sheet is i in thick, and (he back head ,:,., in. Theurates have an area of sip ft. ; the healing surface olthe tire-box, deducting the sectional area of the tubes, the who were the contractors, we are now able to present illustra-tions and a description of the air pumps used in connectionwith the main engines. There are two single acting, vertical air-pumps for eachprspelling engine; and they are worked by a two-cylinder. Vol. I,XIX. No. AND RAILROAD JOURNAL. 313. vertical compound engine, which is placed above the pumpsthe cylinders and pump barrels having a common centre piston and pinup rods are made in one piece, and ofmanganese bronze. The engine and pump-cylfnders are ticritogether by forged steel slays, as shown in Ihe engraving, andilin whole is bolted i the Bulkheads by means oil the flangesprovided for the purpose and which lire faced. The crank-shaft is above the engine cylinders with counterbalancedcranks standing :it right angles to each other. This shaft iscarried in three bearings, the ccntiul one being in in. long,and those at the ends 0 in. long each ; the shaft itself havinga diameter of 4 in. Each crank-pin is 4$ in. In diameter andfj In, long, with a J in. axial hole drilled through it. The engine cylinders are 10 in. and 18 in. in diameter, witha common stroke of piston of li in., and are bolted together,as shown on the engraving. The high-pressure cylinder isoperated with a piston-valve, and the low-pressure with
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
