Lynde, Carleton John, b. 1872 · New York, Macmillan · leaf 83
chamber on its way tothe pump, it is .strained through the cloth bag. It is therebyfreed from the dirt, which is retained in the bag. This is opera-tion number three. 68 PHYSICS OF THE HOUSEHOLD The air pump. — The air pump shown in Fig. 49 is what isknown as a double-acting diaphragm pump. It is… … Atmosphere forces A>r in FIG. 49. — Showing how the vacuum cleaner works. There are two valves in each chamber, i and 3 in one, 2 and 4 inthe other. All of these valves open upward. When the piston is moved to the right, as in the figure, thesize of the left-hand chamber is increased and that of…
Physics · Home Economics
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