Drop Cut-Off Valve and Mechanism Model
notes: label: Description
content: This is a wooden model of a very simple variable drop cut-off valve gear in which a poppet valve is lifted by a bell crank operated by a cam. The cam is a cylinder that may be moved parallel to its axis, so as to bring any part of the cam against the follower of the bell crank. The cam is so shaped that the valve will open at the same time for all positions of the cam, but the valve will close progressively earlier or later as the cam is moved along its 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
place: label: place made
content: United States: Rhode Island
setName: label: See more items in
content: Work and Industry: Mechanical and Civil Engineering
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content: Bulletin 173
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content: Engineering, Building, and Architecture
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content: Work
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content: Industry & Manufacturing
publisher: label: Related Publication
content: Frank A. Taylor. Catalog of the Mechanical Collections of the Division of Engineering United States National Museum, Bulletin 173
creditLine: label: Credit Line
content: Gift of Franklin Machine Company, Providence, R. I.
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MC.309819
label: catalog number
content: 309819
label: accession number
content: 109438
objectType: label: Object Name
content: valve gear, steam engine
label: Object Name
content: valve gear, steam engine, model
physicalDescription: label: Physical Description
content: wood (overall material)
label: Measurements
content: overall: 6 in x 13 in x 6 in; 15.24 cm x 33.02 cm x 15.24 cm