Lynde, Carleton John, b. 1872 · New York, Macmillan · leaf 82
achine is at the samepressure as the atmosphere outside. When the handle of theair pump is moved back and forth, air is pumped out of the AIR APPLIANCES 67 cleaning chamber. This decreases the pressure of the air, or,in other words, produces a partial vacuum in the chamber.This is operation number… … FIG. 48. — A hand power vacuum cleaner. cleaning tool, and hose, and the dust and dirt are carried inwith the air. This is operation number two. As the a^ passes through the cleaning chamber on its way tothe pump, it is .strained through the cloth bag. It is therebyfreed from the dirt, which is…
Physics · Home Economics
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