Hewitt Piston-Rod Packing, Patent Model
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The rings are alternately beveled in opposite directions so that adjoining surfaces match. The edges of the flange and gland are beveled so that when the parts are brought together and tightened the effect is of a number of double wedges sliding together and expanding between the stuffing box and the shaft."}, {"label": "Description", "content": "Reference:"}, {"label": "Description", "content": "This description comes from the 1939 Catalog of the Mechanical Collections of the Division of Engineering United States Museum Bulletin 173 by Frank A. Taylor."}, {"label": "Location", "content": "Currently not on view"}], "name": [{"label": "inventor", "content": "Hewitt, John"}], "publisher": [{"label": "Related Publication", "content": "Frank A. Taylor. Catalog of the Mechanical Collections of the Division of Engineering United States National Museum, Bulletin 173"}], "place": [{"label": "place made", "content": "United States: Missouri"}, {"label": "associated place", "content": "United States: Missouri, St. Louis"}], "physicalDescription": [{"label": "Physical Description", "content": "brass (overall material)"}, {"label": "Measurements", "content": "overall: 3 in x 4 in x 7 in; 7.62 cm x 10.16 cm x 17.78 cm"}], "dataSource": [{"label": "Data Source", "content": "National Museum of American History"}], "objectType": [{"label": "Object Name", "content": "piston rod packing, model"}, {"label": "Object Name", "content": "patent model, piston rod packing"}, {"label": "Object Type", "content": "Patent Model"}]}}, "url": "edanmdm:nmah_847480", "hash": "801ced00aa1a5c4d34f30cda9ee9835ca999abfd", "docSignature": "badecf0aa1425dee32d8118cdeca29eb", "timestamp": 1663782597, "lastTimeUpdated": 1655973461, "title": "Hewitt Piston-Rod Packing, Patent Model"}