Dow Direct-Acting Steam Pump, Patent Model
date: label: date made
content: 1879
label: patent date
content: 1879-11-04
name: label: inventor
content: Dow, George E.
notes: label: Description
content: This model was filed to the U.S. Patent Office with the application for the patent issued to G. E. Dow, of San Francisco, California, November 4, 1879, no. 221220.
label: Description
content: The model represents a form of valve gear for a direct-connected steam engine in which the main valve is partially operated by a system of cam-shaped levers actuated from the main piston rod and partially by a supplementary steam piston, the movement of which is controlled by valves connected to the same levers.
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: California
label: associated place
content: United States: California, San Francisco
setName: label: See more items in
content: Work and Industry: Mechanical and Civil Engineering
label: See more items in
content: Bulletin 173
label: See more items in
content: Engineering, Building, and Architecture
label: See more items in
content: Work
label: See more items in
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.308703
label: accession number
content: 89797
label: catalog number
content: 308703
label: patent number
content: 221,220
objectType: label: Object Name
content: valve gear, steam pump, patent model
label: Object Name
content: patent model, valve, steam engine
label: Object Type
content: Patent Model
physicalDescription: label: Physical Description
content: wood (overall material)
label: Measurements
content: overall-from catalog card: 5 in x 3 in x 8 in; 12.7 cm x 7.62 cm x 20.32 cm
label: Measurements
content: overall: 5 5/8 in x 3 1/2 in x 12 3/8 in; 14.2875 cm x 8.89 cm x 31.4325 cm