Stationary steam engines, simple and compound; especially as adapted to electric lighting purposes . dash-pot. When the valve is suddenly closed, somedevice is necessary to prevent jar at the instant of its com- ELECTRIC LIGHTING PLANTS. 31 ing to rest. This device is the dash-pot. The form adoptedby Corliss consists of a shallow cup into which a piston onthe valve stem fits, cushioning the enclosed air, and thuschecking the motion of the valve without shock. This dash-pot, made by Watts, Campbell & Co., who have successfullyintroduced Corliss engines into electric light establishmentsin New Y
Stationary steam engines, simple and compound; especially as adapted to electric lighting purposes . dash-pot. When the valve is suddenly closed, somedevice is necessary to prevent jar at the instant of its com- ELECTRIC LIGHTING PLANTS. 31 ing to rest. This device is the dash-pot. The form adoptedby Corliss consists of a shallow cup into which a piston onthe valve stem fits, cushioning the enclosed air, and thuschecking the motion of the valve without shock. This dash-pot, made by Watts, Campbell & Co., who have successfullyintroduced Corliss engines into electric light establishmentsin New York city and elsewhere, is that seen in the Figs. The annular piston, E, E, fits the cylinder, Z>, Z>, E} E}and a space, seen above B, forms a vacuum chamber whichassists the spring or weight, closing the valve by the form-ation of a more or less complete vacuum, as the pis-ton is raised while the valve is opening. A small cock,not seen, is arranged to adjust the degree of ex-haustion of this chamber. When the valve has nearlyreached its seat, the piston Z>, passes the opening from
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectsteamen, bookyear1890
