Otto and Bell Balanced Slide Valve, Patent Model
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Bell, of Bloomington, Illinois, December 18, 1883, no. 290650."}, {"label": "Description", "content": "The model represents a D-slide valve of ordinary shape, with most of the back cut away and formed in the shape of a short hollow cylinder. This cylinder is filled with a closed piston suspended on rollers on a flat bar, which, in turn, is suspended from the top of the valve chest. The bar passes through a tunnel in the piston and is of sufficient length to accommodate the valve travel. The effect of this construction is that the steam pressure ordinarily exerted on the back of a flat valve is in this case exerted on a piston that is not a part of the valve but is suspended independently."}, {"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": "Otto, Henry"}, {"label": "inventor", "content": "Bell, Patrick F."}], "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: Illinois"}, {"label": "associated place", "content": "United States: Illinois, Bloomington"}], "physicalDescription": [{"label": "Measurements", "content": "overall-from catalog card: 5 1/2 in x 4 1/2 in; 13.97 cm x 11.43 cm"}, {"label": "Measurements", "content": "overall: 2 1/2 in x 6 1/2 in x 4 1/2 in; 6.35 cm x 16.51 cm x 11.43 cm"}], "dataSource": [{"label": "Data Source", "content": "National Museum of American History"}], "objectType": [{"label": "Object Name", "content": "valve, balanced, slide, model"}, {"label": "Object Name", "content": "patent model, balanced slide"}, {"label": "Object Type", "content": "Patent Model"}]}}, "url": "edanmdm:nmah_847099", "hash": "65defed2d4376a17669f78dd26be5890a421e4ff", "docSignature": "bfc852c5ab0ad98abfb457ef3c330507", "timestamp": 1663782597, "lastTimeUpdated": 1655973461, "title": "Otto and Bell Balanced Slide Valve, Patent Model"}