Corliss Exhaust-Valve Gear, Patent Model

This model was submitted to the U.S. Patent Office with the application for the two patents issued to George H. Corliss, May 9, 1876, nos. 177059 and 177099.
The model represents the valve gear of a horizontal cylinder with a separate rotary steam and exhaust valve at each end of the cylinder. The valves are driven from one wrist plate, the steam valves through disengaging hooks or catches, which are controlled by the governor, the exhaust valves by a series of permanently connected links designed to effect a quick closing of the exhaust valves. The steam valves are closed by vacuum dash pots instead of by weights or springs as in the earlier Corliss valve gears.
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.
Currently not on view
Object Name
valve gear, model
patent model, valve, steam engine
date made
patent date
Corliss, George H.
Physical Description
wood (overall material)
metal (overall material)
walnut block-from catalog card: 5 1/2 in x 6 in; 13.97 cm x 15.24 cm
overall: 7 3/8 in x 6 in x 3 in; 18.7325 cm x 15.24 cm x 7.62 cm
place made
United States: Rhode Island
associated place
United States: Rhode Island, Providence
ID Number
accession number
catalog number
patent number
Engineering, Building, and Architecture
Industry & Manufacturing
Bulletin 173
See more items in
Work and Industry: Mechanical and Civil Engineering
Bulletin 173
Data Source
National Museum of American History, Kenneth E. Behring Center
Related Publication
Frank A. Taylor. Catalog of the Mechanical Collections of the Division of Engineering United States National Museum, Bulletin 173

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