. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . FlO. 27.—The Biill triple-expansion enpine. kept in place by a stool spring at tlic haek. Fig. 25 is a section through tlie main tlie two bearings in a single casting, wilii tiie overhang at each end nearly lialanecdand reduced to a minimum l)y means of olTset liubs. Fig. 2(i is another view of the bearing,showing the Habl)itt liners. These are all east in an iron mold, so that eiich one is an exactd
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . FlO. 27.—The Biill triple-expansion enpine. kept in place by a stool spring at tlic haek. Fig. 25 is a section through tlie main tlie two bearings in a single casting, wilii tiie overhang at each end nearly lialanecdand reduced to a minimum l)y means of olTset liubs. Fig. 2(i is another view of the bearing,showing the Habl)itt liners. These are all east in an iron mold, so that eiich one is an exactduplicate of every other one, anil can Ije (juickly removed and re])lac(d. The liners are usedin the main-bearing, the cr()., and the erank-pin. In the two latter places they arebedded in brass boxes, which are free to expand. Thus, should the pin heat, the brass, having ENGINES, STEAM, STATIONARY RECIPROCATING. 307 a greater expansive power than steel or iron, and being free, will expand and loosen the fit,instead of tightening it, as is the case when bound with an iron Fig. 28.—Ball engine steam-chest. The Ball Engine.—Fig. 27 represents a double-tandemcondensing triple-expansion engine made by tiie Ball EngineCo., Erie. Pa. This engine is built in sizes of 300, 400, 500,GOO, and 700 horse-power. Fig. 28 shows a section through the steam-chest and valveof the Ball engine. Fig. 29 shows three views of the construc-tion of the valve. It consists of two parts, which are con-nected by telescopic sleeves, allowing each half to adjust it-self to its seat. The sectional view shows the manner of steamdistribution to the cylinder, and the operation of the double-faced valve is held in constant and steam-tightcontact with an upper and lower horizontal valve-face, whoseareas, in proportion to the surface of the valve, are identical. The live steam enters the upper side of the valve, and, being inclosed by the telescopic shells,presses the faces apart with
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
