Chandler And Silver Hydraulic Engine, Patent Model

This model was submitted to the U.S. Patent Office with the application for the patent issued to Lucius S. Chandler and Samuel N. Silver, of Auburn, Maine, August 27, 1878, no. 207391.
The engine has four single-acting, horizontal cylinders arranged in a block like the chambers of a revolver. Connecting rods form the four pistons connect to pins on crank disks on a common shaft. The head ends of the four cylinders open into a drum-like exhaust chamber. A rotary valve of peculiar construction revolves in the exhaust chamber close to the ends of the cylinders and opens the cylinders to the exhaust chamber or to the pressure inlet pipe, which forms the hollow stem of the valve, in proper sequence. The hollow stem of the valve passes out of the forward side of the exhaust chamber through a gland and bearing. It carries a spur gear that meshes with a pinion on a lay shaft, which parallels the cylinders and is turned by a bevel gear pair at the crankshaft.
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
Chandler, Lucius S.
Silver, Samuel N.
place made
United States: Maine, Maine
associated place
United States: Maine, Auburn
Physical Description
brass (overall material)
brass engine - from catalog card: 12 in; 30.48 cm
overall: 4 3/4 in x 5 7/8 in x 11 1/2 in; 12.065 cm x 14.9225 cm x 29.21 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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