Gilles Gas Engine, Patent Model

Description
This model was submitted to the U.S. Patent Office with the application for the patent issued to Friedrich W. Gilles, of Kalk, Germany, July 11, 1876, no. 179782.
The engine represented by the model is a 1-cylinder vertical gas engine employing two pistons, a working piston (the lower one) and a loose piston (the upper one). The loose piston was intended to fly to the top of the cylinder where it would be caught and held, producing within the cylinder a reduced pressure, which would cause the work piston to return under the pressure of the atmosphere and thereby perform work on the return stroke as well as the explosion stroke. Provision was made to cushion the free piston at the top of its stroke for the purpose of quiet running. The combustion mixture was drawn in and ignited on the explosion stroke without compression.
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.
Location
Currently not on view
Object Name
engine, steam, model
patent model, engine, gas
date made
1876
patent date
1876-07-11
inventor
Gilles, Friedrich W.
Physical Description
metal (overall material)
wood (base material)
Measurements
overall: 12 3/4 in x 4 5/8 in x 4 1/4 in; 32.385 cm x 11.7475 cm x 10.795 cm
place made
Deutschland
associated place
Deutschland: North Rhine-Westphalia, Köln, Kalk
ID Number
MC*311183
catalog number
311183
accession number
89797
patent number
179,782
subject
Engineering, Building, and Architecture
Work
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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