A history of the growth of the steam-engine . drives the water out through the forcing-pipe, G, the clack-valve, F, on that pipe opening before it, and the liquid isexpelled from the top of the pipe. The valve, G, is agaiaclosed ; the steam again condenses, and the engine is workedas before. While one of the two receivers is discharging,the other is filling, as in the machine of the Marquis ofWorcester, and thus the steam is drawn from the boilerwith tolerable regularity, and the expulsion of water takesplace with similar uniformity, the two systems of receiversand pipes being worked alternate
A history of the growth of the steam-engine . drives the water out through the forcing-pipe, G, the clack-valve, F, on that pipe opening before it, and the liquid isexpelled from the top of the pipe. The valve, G, is agaiaclosed ; the steam again condenses, and the engine is workedas before. While one of the two receivers is discharging,the other is filling, as in the machine of the Marquis ofWorcester, and thus the steam is drawn from the boilerwith tolerable regularity, and the expulsion of water takesplace with similar uniformity, the two systems of receiversand pipes being worked alternately by the single another and still simpler little machine, which he Fig. 11.—Saverys Model, 1698. Bradley, New Improvements of Planting and , ]729. Switzer, THE PERIOD OF APPLICATION. 35 erected at Kensington (Fig. 12), the same general planwas adopted, combining a suction-pipe, A, IQ feet longand 3 inches in diameter ; a single receiver, £, capableof containing 13 gallons ; a boiler, 0, of about 40 gallons. Tio. 12.—Saverys Engine, capacity ; a forcing-pipe, J), 42 feet high, with the con-necting pipe and cocks, M F Q; and the method ofoperation was as already described, except that surface-condensation was employed, the cock, F, being arrangedto shower water from the rising main over the receiver,as shown. Of the first engine Switzer says : I haveheard him say myself, that the very first time he played,it was in a potters house at Lambeth, where, though it wasa small engine, yet it (the water) forced its way throughthe roof, and struck off the tiles in a manner that surprisedall the spectators. The Kensington engine cost £50, and raised 3,000 gal-lons per hour, filling the receiver four times a minute, andrequired a bushel of coal per day. Switzer remarks : Itmust be noted that this engine is but a small one in com-parison with many others that are made for coal-works ;but this is sufficient for any reasonable family, and other 36 THE STE
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Keywords: ., bookcentury1800, bookdecade1870, bookidc, booksubjectsteamengines
