Stationary steam engines, simple and compound; especially as adapted to electric lighting purposes . o thewriter, is that now constructed by the Providence SteamEngine Co., and shown in the large illustration, page 35. Inthis engine, the steam valves are connected to the cut-offmechanism, by a set of rods or stems running parallel totheir seats, and emerging into the air through stuffingboxes, properly provided with easily set and easy workingpacking; these valve stems are connected to the rock-shafts,and are driven as in the arrangement already described,very nearly; this design has some adva
Stationary steam engines, simple and compound; especially as adapted to electric lighting purposes . o thewriter, is that now constructed by the Providence SteamEngine Co., and shown in the large illustration, page 35. Inthis engine, the steam valves are connected to the cut-offmechanism, by a set of rods or stems running parallel totheir seats, and emerging into the air through stuffingboxes, properly provided with easily set and easy workingpacking; these valve stems are connected to the rock-shafts,and are driven as in the arrangement already described,very nearly; this design has some advantages over the old,in keeping the working parts, and especially the joints, outof the steam space. The exhaust valves are gridiron slides,set to travel across the line of the cylinder, and driven from 1. Sup lied by D. Api leton & Co. 44 STEAM ENGINES FOR a horizontal rock-shaft, extending forward to the eccentricon the crank-shaft; the governor is a Porter loadedgovernor, driven by a belt from the main shaft; the cut-offmechanism is illustrated in the last of this series of Greene Trip Motion. The tappets, A, A, carried by the rock-shafts, J%y, which, in turn, drive the arms, Fy F, and the valvesattached to the stems, G, G, passing through the stuffingboxes, Hf H; the tappets, B, B, engage these rock-levers,and are adjusted vertically by the governor rod, E>, andheld up against the gai>ge bar or the rock-lever, as the casemay be, by the springs set in the sliding bar. When thespeed of the engine is above that for which the engine isset, the governor, acting through the rod, £>, depresses thetappets, and they do not retain their connection with therock-lever as long as when at normal speed; when the speed ELECTRIC LIGHTING PLANTS. 45 falls below that fixed by the constructor, the governor rodrises, and the tappets are thus permitted to rise, and toremain in contact with the rock-lever, holding open thesteam valve for a longer period than before.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectsteamen, bookyear1890
