Governor and Throttle Valve Model

This is a crank-operated, wooden model of a ball governor connected to a throttle valve in a short section of pipe.
The governor consists of balls hung in the usual manner upon arms attached by pin joints at their upper ends to the top of the governor spindle. Radius rods from the centers of the ball arms connect to a collar upon the spindle, so that the collar moves up and down as the balls are swung in or out by changes in the speed of the engine. The sliding collar is connected to a crank on the axis of the disk of a plain butterfly 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
place made
United States: Rhode Island
overall: 18 3/8 in x 12 3/8 in x 4 1/2 in; 46.6725 cm x 31.4325 cm x 11.43 cm
in wooden frame-from catalog card: 12 in x 15 1/2 in x 4 1/2 in; 30.48 cm x 39.37 cm x 11.43 cm
ball governor, solid pattern of-from catalog card: 7 in x 10 in; x 17.78 cm x 25.4 cm
ID Number
accession number
catalog number
Credit Line
Gift of Franklin Machine Company, Providence, R. I.
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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