. Machinery and processes of the industrial arts, and apparatus of the exact sciences. Fig. 22. Fiff. 23. in a circle by the simultaneous action of both pistons. The smaller pis-ton is shown separately in Fig. 24, and the crank in Fig. 25. Fig. 23 rep-resents a plate which closes the steam-box or cylinder, Fig. 21, the sur-face presented being that which is external when the plate is in 98 PARIS UNIVERSAL Fiff. 24. The circular chamber shown in Fig. 23 is the valve box, which is closed byanother plate screwed over it. The steam, which is admitted from above, enters at K
. Machinery and processes of the industrial arts, and apparatus of the exact sciences. Fig. 22. Fiff. 23. in a circle by the simultaneous action of both pistons. The smaller pis-ton is shown separately in Fig. 24, and the crank in Fig. 25. Fig. 23 rep-resents a plate which closes the steam-box or cylinder, Fig. 21, the sur-face presented being that which is external when the plate is in 98 PARIS UNIVERSAL Fiff. 24. The circular chamber shown in Fig. 23 is the valve box, which is closed byanother plate screwed over it. The steam, which is admitted from above, enters at K and is conducted tothe valve-box by a passage inthe plate Fig. 23, not the valve-box it is ad-mitted to the cylinder throughthe openings marked G, when-Fig. 25. ever they are uncovered by the valve. Through the same openings the exhaust steam escapes, not intothe valve-box, but into the annular channel marked H, when the valve-plate, which is countersunk on its lower face for this purpose, coversthem. A single valve-plate serves for the entire distribution. It isshown in Fig. 22. Its form is circular, and it has an annular counter-sinkM on the face applied to the valve face I, designed, as just stated, to allowthe exhaust steam to escape into H. From H this steam is conductedthrough channels shown in dotted lines to the openings marked H inFig. 21, and thence through channels in the body of the casting to J, o
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Keywords: ., bookcentury1800, booksubjectmachinery, booksubjectscientificappa
