Stationary steam engines, simple and compound; especially as adapted to electric lighting purposes (1890)
Thurston, Robert Henry, 1839-1903 · New York, J. Wiley & sons · leaf 88
kept precisely at speed, unless the speedis such as will give the governor exactly its normal positionand, at the same time, such that the valves shall supply justthe normal quantity of steam to the engine. With reducedsteam pressure, the engine drops to a slightly lower speed,and runs at that… … I ft Qg o Huwc/3 ELECTRIC LIGHTING PLANTS. 75 form speed. If, however, we can substitute for the actionof gravity, a force which can be made to vary with changein the position of the balls, in such a way that the variation inthe opening of the throttle, or in position of the point ofcut-off, shall…
Steam-engines
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