Stationary steam engines, simple and compound; especially as adapted to light and power plants . un-der the loads transmitted through it. To secure better dis-tribution of wear, the crank shaft is allowed some end-play, together with the carefully arranged systemof lubrication, are the best possible insurance against exces-sive friction and wear. The steam cylinder has the appearance of the cylinderfamiliar to every one, as seen on ordinary plain slide-valveengines. Its valve chests enclose separate double valves forsteam and exhaust, and the ports and passages are carried asin t
Stationary steam engines, simple and compound; especially as adapted to light and power plants . un-der the loads transmitted through it. To secure better dis-tribution of wear, the crank shaft is allowed some end-play, together with the carefully arranged systemof lubrication, are the best possible insurance against exces-sive friction and wear. The steam cylinder has the appearance of the cylinderfamiliar to every one, as seen on ordinary plain slide-valveengines. Its valve chests enclose separate double valves forsteam and exhaust, and the ports and passages are carried asin those engines. The valve stems have no stuffing boxes,but pass into the chest through unusually long and carefullyfitted holes, in a hub, made about five one-thousandths ofan inch larger than the rod inside the Babbitt metal bush-ing, for a length of six diameters or more. The hub isloose in the hole in the end of the valve chest, and ispacked at the ends by a washer fitted on a flat seat on theinside. The piston-rod is similarly fitted. The crosshead is a very long casting which overruns the. ELE C TRIG LIGH TING FLA NTS. 10^ guide at each end at every stroke, and thus is rendered safeagainst wearing to a shoulder. A pin subject to recipro-cating efforts in any part of an engine, whether it rotates, orcarries a rotating or a vibrating piece, is apt. in time, toshow wear on the two sides in line with the principal pullor thrust, and to lose its cylindrical form. In this engine,such wear is avoided at the crosshead pin, by cutting awaythe surfaces, which do little or no work, and thus securingoverrunning surfaces, which are not subject to this distortedwear to so great an extent. Many other minor points inviteattention, but they cannot be here considered. The principal feature of this design, in connection withthat phase of its work which is of especial interest here, isits valve-motion. The valve is a rectangular block, slidingbetween the seat and acoverplate; is shown in the en
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectsteamen, bookyear1902
