Dow Direct-Acting Steam Pump, Patent Model

Description
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.
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.
Reference:
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.
Location
Currently not on view
date made
1879
patent date
1879-11-04
inventor
Dow, George E.
place made
United States: California
associated place
United States: California, San Francisco
Physical Description
wood (overall material)
Measurements
overall-from catalog card: 5 in x 3 in x 8 in; 12.7 cm x 7.62 cm x 20.32 cm
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
ID Number
ER.308703
accession number
89797
catalog number
308703
patent number
221,220
See more items in
Work and Industry: Mechanical and Civil Engineering
Work
Industry & Manufacturing
Bulletin 173
Engineering, Building, and Architecture
Data Source
National Museum of American History, Kenneth E. Behring Center

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