Model of a Horizontal Mill Type Steam Engine, 1860
date: label: date made
content: 1860
notes: label: Description
content: The valve in this model of a typical mid-19th century engine cuts off the steam to the cylinder at a fixed point in the stroke, resulting in relatively poor efficiency. Speed could only be regulated by throttling the main steam supply. A single eccentric drove the steam valve. The valve was a simple, D-type slide valve. The valve casing and cylinder are sectioned to allow visualization of the mechanisms.
place: label: place made
content: United States: Maryland
topic: label: Subject
content: Steam Engines
label: Subject
content: Model
setName: label: See more items in
content: Work and Industry: Mechanical and Civil Engineering
label: See more items in
content: Engineering, Building, and Architecture
label: Exhibition
content: Power Machinery
label: Exhibition Location
content: National Museum of American History
creditLine: label: Credit Line
content: Gift of The John Hopkins University, Baltimore, Maryland
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MC.322259
label: catalog number
content: 322259
label: accession number
content: 246694
objectType: label: Object Name
content: Engine, Steam
label: Object Name
content: engine, steam, horizontal, model, 1860
physicalDescription: label: Measurements
content: overall: 20 in x 25 in x 11 in; 50.8 cm x 63.5 cm x 27.94 cm