. The railroad and engineering journal . etting a clearerunderstanding of the construction of a cylinder. The steam-chest in the present illustration is cast with thecylinder and forms a part of the same casting. The cover U isbolted to the chest by the studs which are clearly shown in theengraving. The flange IV is for fastening the cylinder to theengine-frame. The bolts/, /, represented by dotted circles infig. 20S, are also for fastening the cylinder to the frame. SLIDE-VALVE. The slide-valve for the engine, which has been illustrated bythe preceding engravings in this chapter, is shown by
. The railroad and engineering journal . etting a clearerunderstanding of the construction of a cylinder. The steam-chest in the present illustration is cast with thecylinder and forms a part of the same casting. The cover U isbolted to the chest by the studs which are clearly shown in theengraving. The flange IV is for fastening the cylinder to theengine-frame. The bolts/, /, represented by dotted circles infig. 20S, are also for fastening the cylinder to the frame. SLIDE-VALVE. The slide-valve for the engine, which has been illustrated bythe preceding engravings in this chapter, is shown by figs. 211-214. These engravings should be drawn by the student either Vol. LXV, No. ENGINEERING JOURNAL. 39 half or full size. Fig. 211 is a side view of the valve, fig. 212 anend view. fig. 213 a sectional plan on the line A B, of fig. fig. 214 is another similar plan with the valve in a diflferentposition from that shown in fig. 213. CD is the valve-face, whichin this case stands vertical. In many engines, especially loco-. motives, it is usually placed horizontal. P P are the steamand X the exhaust-passages. The openings where these emergeinto the valve-seat are called steam and txhatist-poits. The action of the valve may be readily understood from and 214. In fig. 213 the valve is shown on the middle of its seat, and it then covers both the steam-ports and the exhaust-port. In fig. 214 the valve has been moved toward the left sideof the valve-seat and has uncovered the steam-port P. As thevalve is inside of the steam-chest, if steam is turned on and thechest is filled with steam it will flow into the port /, when itis uncovered, as indicated by the darts i i, andwill be conducted to the front end of the cylin-der. At the same time the exhaust cavity E, inthe vilve, covers the steam-port /and exhaust-port A, and communication is thus establishedbetween the front end of the cylinder and the ex-haust-passage A, and the steam in the front endof the cylinder
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
