Woodbury’s Patent Model of an Automatic Cut-Off for a Steam Engine – ca 1870


This model was filed with the application to the U.S. Patent Office for Patent Number 107,746 issued to Daniel A. Woodbury of Rochester, New York, on September 27, 1870. The patent was for an improved design for a governor which could control the cut-off valve for a steam engine. His design, instead of being based on fly balls and mounted on the steam valves, included a system of springs and weights placed directly on the engine's shaft. While more complicated and needing to be specifically designed for a particular engine, it had the advantage of accuracy and economy of operation. Mr. Woodbury's design became one of the first industrially successful shaft governors, and such governors became increasingly popular after this invention.

The patent model is constructed of metal and mounted on a wood base. All of the key elements of the patent are illustrated by the model. A full description of the workings of the governor and diagrams showing the complete design of the patent can be found in the patent document online at the United States Patent and Trademark Office website, www.uspto.gov.

Date Made: 1870ca 1870Patent Date: 1870-09-27

Inventor: Woodbury, Daniel A.

Place Made: United States: New YorkAssociated Place: United States: New York, Rochester

Subject: Patent ModelsSteam Engines


See more items in: Work and Industry: Mechanical and Civil Engineering, Engineering, Building, and Architecture, Work, Industry & Manufacturing, 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

Data Source: National Museum of American History

Id Number: MC.251290Catalog Number: 251290Accession Number: 48865Patent Number: 107,746

Object Name: governor, woodbury, modelpatent model, engine, cut off for steam

Measurements: overall: 12 in x 9 in; x 30.48 cm x 22.86 cm

Guid: http://n2t.net/ark:/65665/ng49ca746a6-692e-704b-e053-15f76fa0b4fa

Record Id: nmah_846144

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.