This model was submitted to the U.S. Patent Office with the application for the patent issued to Alexander Friedman, of Vienna, Austria, April 6, 1869, no. 88620.
The model represents a steam injector designed for elevating or forcing water and reducing the shock produced by the sudden condensation of steam when brought into contact with the water.
The injector is of the usual form with the addition of a small auxiliary steam jet, or ejector, which serves to draw water into the mixing chamber before the main steam valve is opened. A safety cock is also provided, which permits a part of the water to escape as the pressure is being raised to the degree sufficient to overcome the resistance against which the injector is working.
Reference:
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.
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