Carhart Balanced Valve, Patent Model
Carhart Balanced Valve, Patent Model
- Description
- This model was submitted to the U.S. Patent Office with the application for the patent issued to John W. Carhart, of Troy, New York, March 27, 1866, no. 53410.
- The model represents a conical plug valve with an annular exhaust space between the plug and the valve and a steam passage through the hollow core of the plug. The peculiar feature of the valve is the provision of recessed annular spaces in the valve, which, with the valve seat, form small pistons and cylinders designed to balance the valve longitudinally when connected to the steam passages. Screw adjustments on the valve stem and the small end of the valve are provided for setting the valve in a position giving proper contact with the minimum of friction.
- 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
- balance valve, model
- patent model, valve, steam engine
- Object Type
- Patent Model
- date made
- 1866
- patent date
- 1866-03-27
- inventor
- Carhart, John W.
- place made
- United States: New York, Troy
- associated place
- United States: New York, Troy
- Physical Description
- brass (overall material)
- wood (overall material)
- Measurements
- valve - from catalog card: 2 1/2 in x 6 in; 6.35 cm x 15.24 cm
- overall: 3 3/4 in x 6 in x 2 1/4 in; 9.525 cm x 15.24 cm x 5.715 cm
- ID Number
- ER.308671
- accession number
- 89797
- catalog number
- 308671
- patent number
- 53,410
- 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.
