Hiram Maxim Pumping Engine, Patent Model

Hiram Maxim Pumping Engine, Patent Model

This model was submitted to the U.S. Patent Office with the application for the patent issued to Hiram S. Maxim, of New York, New York, December 22, 1874, no. 158105.
This model represents a steam engine, pump, and gas-fired boiler, equipped with automatic valves for maintaining the proper level of water in the boiler and for holding a steady pressure in the boiler by starting or stopping the burner. The combination is a steam-pumping unit intended to function automatically without the services of an attendant.
The engine is supported upon the boiler and consists of a rectangular bed, which serves as the pump suction chamber, upon which is the vertical pump cylinder and the pedestal that supports the flywheel and crankshaft journals and the oscillating steam cylinder. Within the base of the pedestal is a feed-water heater through which the exhaust from the engine passes. A float-operated, weighted, pin valve admits water to the boiler from the discharge pipe of the pump when the level in the boiler falls. The boiler is a cylindrical shell type with combustion chamber formed by water legs in the shape of a truncated cone. A ring burner for gas or kerosene is located in a cylindrical firepot within the combustion chamber. The fuel valve to the burner is held open by a spring and is closed by the pressure within the boiler exerted upon a diaphragm and lever. A hole through the valve permits a small pilot flame to burn at all times.
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
automatic pumping engine, model
patent model, engine, automatic pumping
Object Type
Patent Model
date made
patent date
Maxim, Hiram S.
place made
United States: New York
associated place
United States: New York, New York City
Physical Description
brass (overall material)
overall: 11 7/8 in x 5 1/4 in; 30.1625 cm x 13.335 cm
ID Number
accession number
catalog number
patent number
See more items in
Work and Industry: Mechanical and Civil Engineering
Bulletin 173
Engineering, Building, and Architecture
Industry & Manufacturing
Data Source
National Museum of American History
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i learn something new every day....a great invention that isn't the usual everyday common thing.. any more on sir hiram ? thanks, henry h. maxim.... charlestown, new hampshire.........(great nephew).

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