Allen Cut-Off Valve, Patent Model
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The supply of steam to each of these steam chests is controlled by additional cut-off valves, the movement of which is adjustable. The inventor refers to this invention as an improvement in the valve gear patented by him August 21, 1841 (patent number 2227)."}, {"label": "Description", "content": "The model shows a portion of the cylinder of a horizontal engine with only the piston rod and cross head represented. A steam chest in which are located the ports leading to the inner or main steam chests is shown in section, revealing the cut-off valves on their seats. These cut-off valves are plain flat plates connected to opposite ends of a beam, which receives a vibratory motion from the cross head of the engine. The beam and its rock shaft are picoted in a lever by which the pivot can be moved and the time of cut-of varied. This the inventor calls \u00e2\u0080\u009ccut-off with movable rock shaft.\u00e2\u0080\u009d He suggests that a similar result can be obtained by constructing the cut-off ports in a movable plate which he calls \u00e2\u0080\u009ccut-off with single adjustable seat.\u00e2\u0080\u009d"}, {"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": "Allen, Horatio"}], "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: New York"}, {"label": "associated place", "content": "United States: New York, New York City"}], "physicalDescription": [{"label": "Measurements", "content": "on green board-from catalog card: 21 in x 11 in; 53.34 cm x 27.94 cm"}, {"label": "Measurements", "content": "overall: 1 3/8 in x 20 7/8 in x 10 7/8 in; 3.4925 cm x 53.0225 cm x 27.6225 cm"}], "dataSource": [{"label": "Data Source", "content": "National Museum of American History"}], "objectType": [{"label": "Object Name", "content": "patent model, valve, steam engine cut off"}, {"label": "Object Type", "content": "Patent Model"}]}}, "url": "edanmdm:nmah_847078", "hash": "403f0f92073302604f6aa09bdf7934b1e6a5b032", "docSignature": "eb19c8e98a5ffa6a663e0e03c2cc6905", "timestamp": 1663782597, "lastTimeUpdated": 1655973461, "title": "Allen Cut-Off Valve, Patent Model"}