Journal of the Association of Engineering Societies (1881)
Association of Engineering Societies (U.S.) · New York, [etc.] Board of Managers · leaf 185
CONDENSING ENGINE PRACTICE. 169 there are pockets which remain filled with air. The pump must dis- charge not only against atmospheric pressure, but against the head of water lying on top of the valves. In the case of the steamer "Tashmoo," recently described to us by Mr. A. G. Mattsson, this back… … Fig. 3. Edwards Pump at Bottom of Stroke. and expands afterward with increased detriment to the vacuum. In the Edwards pump a very small amount of water is retained on top of the valves, the dam shown on the drawing fixing the height at about 4 inches of water. Moreover, as it is a crank-driven…
Engineering
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
