Copy of Sickels' Patent Model of a Steam Engine Cut-Off Valve


Frederick E. Sickels, a pioneer of early steam engine development, is known for his cut-off valve. This type of valve gear provides a means of rapidly cutting off the admission of steam to the cylinder of the engine at any point in the stroke of the piston. It was widely used on the engines of the side wheel steamboats up to the beginning of the 20th century and was the forerunner of the many subsequent designs of drop cut off valve gears.

This model is a copy of the model that was filed with his application for patent. The Sickels valve gear is generally considered to be the first successful and practical drop cut off valve. The original patent model is also in the collections and can be found using its Catalog Number MC.308650.

Date Made: 1842Patent Date: 1842-05-20

Inventor: Sickels, Frederick E.

Place Made: United States: MissouriAssociated Place: United States: New York, New York City

Subject: Patent ModelsSteam Engines


See more items in: Work and Industry: Mechanical and Civil Engineering, Engineering, Building, and Architecture, Patent Models

Exhibition: Power Machinery

Exhibition Location: National Museum of American History

Related Publication: Frank A. Taylor. Catalog of the Mechanical Collections of the Division of Engineering United States National Museum, Bulletin 173

Credit Line: Frederick Elsworth Sickels, Kansas City, Mo.

Data Source: National Museum of American History

Id Number: MC.180973Catalog Number: 180973Accession Number: 24427Patent Number: 2,631

Object Name: engine, steam, valve gear, modelpatent model, valve gear, steam enginepatent model copy, valve gear, steam engine


Record Id: nmah_846135

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