Jenks and Hart Injector, Patent Model

This model was submitted to the U.S. Patent Office with the application for the patent issued to James Jenks and Thomas J. Hart, Detroit, Michigan.
The principal feature of this injector is the method provided for varying the area of the water passage that surrounds the steam-forcing jet. A conical nut screwed onto threads on the outside of the steam tube forms one wall of the water space. The position of the nut on the tube and the area of the water space are changed by turning the nut. The nut is turned by a handwheel, worm, and worm wheel.
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
injector, steam, model
patent model, injector, steam
date made
patent date
Jenks, James
Hart, Thomas J.
overall - from catalog card: 6 in x 6 1/2 in; 15.24 cm x 16.51 cm
overall: 3 3/4 in x 6 in x 6 3/8 in; 9.525 cm x 15.24 cm x 16.1925 cm
place made
United States: Michigan
associated place
United States: Michigan, Detroit
ID Number
catalog number
accession number
patent number
Engineering, Building, and Architecture
Industry & Manufacturing
Bulletin 173
See more items in
Work and Industry: Mechanical and Civil Engineering
Bulletin 173
Data Source
National Museum of American History, Kenneth E. Behring Center
Related Publication
Frank A. Taylor. Catalog of the Mechanical Collections of the Division of Engineering United States National Museum, Bulletin 173

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