Worthington Duplex Steam Pump, Patent Model

This model was submitted to the U.S. Patent Office with the application for the patent issued to Henry R. Worthington, of New York, New York, June 20, 1871, no. 116131.
The model is a relief panel showing a section through the two steam cylinders of a duplex pump arranged to use steam at boiler pressure in one steam cylinder of small diameter, expand the exhaust steam in a receiver of much larger volume than the small cylinder, and use the steam at low pressure in a second cylinder of larger diameter. This arrangement was devised to permit the use of steam expansively in a duplex pump without the use of two compound cylinders, as was formerly the method.
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
date made
patent date
Worthington, Henry R.
place made
United States: New Jersey
associated place
United States: New York, New York
walnut base - from catalog card: 8 in x 17 in; 20.32 cm x 43.18 cm
overall: 9 1/4 in x 17 1/4 in x 5 in; 23.495 cm x 43.815 cm x 12.7 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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