Rider Hot-Air Engine, Patent Model
date: label: date made
content: 1871
label: patent date
content: 1871-01-17
name: label: inventor
content: Rider, Alexander K.
notes: label: Description
content: This model was submitted to the U.S. Patent Office with the application for Patent no. 111088, issued to Alexander K. Rider, of New York, New York, January 17, 1871, reissued August 24, 188-, no. 9353.
label: Description
content: This engine consists of a power piston and a transfer piston so connected with valves and passages that the cold air is received and compressed in the same cylinder in which the hot air performs its work. Its simple construction is an improvement on the John Ericsson hot-air engines of 1855-1858.
label: Description
content: A vertical cylinder contains two independent pistons with suitable valves that permit cold air to be drawn into the cylinder, compressed, circulated between heated furnace walls, expanded under a power piston and then exhausted. The upper piston is equipped with two spring-closed intake valves that open on the upstroke of the piston allowing air to fill the cylinder between the upper and lower pistons. This air is then compressed on the downstroke of the upper piston until the pressure is sufficient to open a valve in a passage leading to a heated space surrounding the furnace. The heated and compressed air then passes into the cylinder below the lower piston where it expands, performing work against the piston.
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: New York
label: associated place
content: United States: New York, New York City
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
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: ER.308714
label: accession number
content: 89797
label: catalog number
content: 308714
label: patent number
content: 111,088
objectType: label: Object Name
content: air engine, model
label: Object Name
content: patent model, engine, air
label: Object Type
content: Patent Model
physicalDescription: label: Physical Description
content: wood (overall material)
label: Measurements
content: wooden model - from catalog card: 8 in x 12 in; 20.32 cm x 30.48 cm
label: Measurements
content: overall: 12 3/4 in x 8 5/8 in x 3 in; 32.385 cm x 21.9075 cm x 7.62 cm