Peavey Fluid Engine Governor, Patent Model

Peavey Fluid Engine Governor, Patent Model

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This model was submitted to the U.S. Patent Office with the application for the patent issued to Andrew J. Peavey of Boston, Massachusetts, August 16, 1870, no. 106400.
The model represents a stationary cylinder filled with oil within which turns a paddle wheel driven by the engine at a speed dependent upon the velocity of the engine. Also within the stationary cylinder and surrounding the paddle wheel is a hollow cylinder, which is hung loosely upon the shaft of the paddle wheel and is free to revolve independently of it. This cylinder has a series of blades or abutments projecting from the inner side of its rim, so that as the paddle wheel causes the oil to revolve in the cylinder the moving oil will come into contact with the abutments and tend to turn the loose cylinder. Attached to the loose cylinder is a pinion that meshes with a toothed sector, which, in turn, is connected with the counterweight and so tends to oppose the turning of that cylinder. As the height to which the counterweight will be raised is a function of the velocity of the engine, this velocity can be governed by properly connecting the counterweight to the cut-off or throttle valve.
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
governor, model
patent model, govenor
patent model, govenor, steam engine
Object Type
Patent Model
date made
patent date
Peavey, Andrew J.
place made
United States: Massachusetts
associated place
United States: Massachusetts, Boston
Physical Description
steel (overall material)
brass (overall material)
steel cylinder - from catalog card: 3 in x 5 in; 7.62 cm x 12.7 cm
overall: 7 1/2 in x 6 in x 6 1/2 in; 19.05 cm x 15.24 cm x 16.51 cm
ID Number
accession number
catalog number
patent number
See more items in
Work and Industry: Mechanical and Civil Engineering
Industry & Manufacturing
Bulletin 173
Engineering, Building, and Architecture
Data Source
National Museum of American History
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