Stationary steam engines, simple and compound; especially as adapted to light and power plants . valve is said by theconstructors to have proved eminently successful and tohave proven more durable than their earlier constructions,in which they adopted a balance flat valve. It is probablytoo early, as yet, to fully decide what are the exact relativemerits of the two kinds of valve. In this particular case,the removal and replacement of the piston valve can bedone quickly and inexpensively, and a spare valve beingkept on hand, it is probable that its use may prove econom-ical and satisfactory ev
Stationary steam engines, simple and compound; especially as adapted to light and power plants . valve is said by theconstructors to have proved eminently successful and tohave proven more durable than their earlier constructions,in which they adopted a balance flat valve. It is probablytoo early, as yet, to fully decide what are the exact relativemerits of the two kinds of valve. In this particular case,the removal and replacement of the piston valve can bedone quickly and inexpensively, and a spare valve beingkept on hand, it is probable that its use may prove econom-ical and satisfactory even where the water used for theboiler is not of the best. One of the most important, novel, and beautifullj^ ingen- I30 STEAM ENGINES FOR ious details of this engine, is its peculiar arrangement ofgovernor and eccentrics. These parts are exhibited in twoengravings. The regulator is precisely the same, in principle, as thosealready described as adapted to the adjustment of theeccentric on the main or the governor shaft. It has the twoweights, I, I, carried on, and forming a part of arms piv-. Armington & Sims Governor and Eccentrics.—Maximum Throw oted to the governor pulley, and revolving in the verticalplane as usual in that class of governors. The position ofthese weights, as determined by the speed and the action ELECTRIC LIGHTING PLANTS. 131 of the springs, determines the position of the eccentrics, C,D, and thus the position and motion of the valve, and thepoint of cut-off, flying out and giving a higher ratio ofexpansion as the load on the engine is diminished, or assteam pressure rises in the slightest degree, and a lowerratio as these conditions are reversed. In the device hereadopted, however, the valve is driven by an eccentricwhich is duplex. One eccentric, C, is set inside another,D, and connected to the governor arms in such a waythat, as the weights separate with increasing speed of en-gine, both eccentrics are turned on the shaft so as to causetheir throws to c
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectsteamen, bookyear1902
