Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary (1917)
Hiscox, Gardner Dexter, 1822?-1908 · New York : The Norman W. Henley publishing co. · leaf 162
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 fed at the top with a small portion… … REVERSIBLE FILTER—The position of the filter 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 the^O sewer while cleaning.
Mechanical movements
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