Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . nerators, from the fact that the jet of water in- into steam. Trouble has been foundin the ra]iid corrosion, and in the cracking of thematerial of the boiler. MeCurdys English patent {A, Fig. 2685), 1824,has a tube into wliich is introduced a smaller tubewith perforations which deliver a fine shower intothe outer tube, which is exposed to the heat
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . nerators, from the fact that the jet of water in- into steam. Trouble has been foundin the ra]iid corrosion, and in the cracking of thematerial of the boiler. MeCurdys English patent {A, Fig. 2685), 1824,has a tube into wliich is introduced a smaller tubewith perforations which deliver a fine shower intothe outer tube, which is exposed to the heat of thefurnace. Dr. Alban. of Mecklenburg, patented, in 1825, adevice (i?. Fig. 2685) in which steam was generatedin a series of strong vertical tubes, whicl> are sub-merged for the greater portion of their length in abath of molten lead. The row of vertical pipes wassupplied by water trickling from a pipe above,somewliat as in Fig. 2684, in which, however, thewater is conducted from the pipe a b by an innertube down to the bottom of the pipe «, in which itis flashed into steam. Jenningss .steam-engine, 1828 (C, Fig. 2685), hasa piston or plunger m which moves in a cylimler nwhen water is injected beneath it by means of the. Inftaixtaneorts Generators. back to the reservoir, /is a branch pipe leadingback from the injection-pipe c to the reservoir, andby means of a cock such part of the water as may bedesired is returned. It forms a means of graduatingthe amount b is the furnace, and h thesteam-pipe to the engine. Fig. 2686 is a form in which a metallic cup extendsupward from the lower and inner surface of the IXSTEP-STRETCHER. 1191 INSULATOR. Fig. 2686.
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