Howard and Bousfield Boiler, Patent Model

This model was submitted to the U.S. Patent Office with the application for the patent issued to James Howard and Edward Bousfield, of Bedford, England, April 4, 1871, no. 113298.
The model represents a sectional marine water-tube boiler in which the proportions of the elements and the manner of their connections are designed by the inventor to facilitate the removal of tubes or sections within a relatively small space.
The boiler is constructed of sections, each of which consists of a vertical tube at the back of the boiler from which projects a vertical row of horizontal tubes. Each horizontal tube is closed at the front end with a screw plug through which a short central tube connects to a small vertical tube, common to all the horizontal tubes of a vertical row. These vertical tubes at the front are closed at the bottom end and are joined by a transverse steam pipe at the top. The horizontal tubes are staggered and may be withdrawn horizontally by disconnecting them from the two vertical tubes at front and back. Each horizontal tube has an internal tube designed to improve the circulation. The back vertical tubes are flat sided and placed together to form the back of the boiler. The horizontal tubes in the outside sections are assembled close together to form the sides of the boiler.
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
Howard, James
Bousfield, Edward Tenney
place made
United Kingdom: England
associated place
United Kingdom: England, Bedford
overall: 2 1/4 in x 9 7/8 in x 12 in; 5.715 cm x 25.0825 cm x 30.48 cm
ID Number
catalog number
accession 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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