Allen Two-Motion Cone-Valve, Patent Model
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The first motion is a slight one parallel with the axis of the cone and directed toward its larger end; the other is in a direction tending to rotate the valve. Because the valve and valve seat are conical, the first motion effects a very slight separation of the valve from its seat and permits the rotary motion to be given without friction upon those parts."}, {"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": "overall: 3 1/4 in x 9 in x 4 1/4 in; 8.255 cm x 22.86 cm x 10.795 cm"}], "dataSource": [{"label": "Data Source", "content": "National Museum of American History"}], "objectType": [{"label": "Object Name", "content": "valve gear, cone, steam engine, model"}, {"label": "Object Name", "content": "patent model, valve, cone"}, {"label": "Object Type", "content": "Patent Model"}]}}, "url": "edanmdm:nmah_847103", "hash": "224e6f14245dd1f82545685d6579e811afe9dc30", "docSignature": "6f65c5c125c3a3298af4a05fe5cae018", "timestamp": 1663782597, "lastTimeUpdated": 1655973461, "title": "Allen Two-Motion Cone-Valve, Patent Model"}