Dow Direct-Acting Steam Pump, Patent Model
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
- Object Name
- valve gear, steam pump, patent model
- patent model, valve, steam engine
- Object Type
- Patent Model
- 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
- Bulletin 173
- Engineering, Building, and Architecture
- Work
- Industry & Manufacturing
- Data Source
- National Museum of American History
Nominate this object for photography.
Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.
If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.
Note: Comment submission is temporarily unavailable while we make improvements to the site. We apologize for the interruption. If you have a question relating to the museum's collections, please first check our Collections FAQ. If you require a personal response, please use our Contact page.
