Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 166
i n ., A .i-5 ■ :\ \ <S j.Hll 1 Y^ 573. WATER PURIFYING FILTER, « N. Y. Filter Mfg. Co. pattern. A diaphragmnear the bottom holds the gravel and sandfiltering material. There is a shaft through themiddle of the tank, with arms for stirring thesand while cleaning by a back-waterflow. Thewater is… … 574. REVERSIBLE FILTER.—The positionof the fiher in the cut is for filter-ing downward. By turning it overon the trunnions it can be cleanedfrom above downward, whichclears it of all sediment. The in-flow is from above and the wasteis through the trunnions to thesewer while cleaning.
Mechanical movements
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