Bimetal Thermostat

Bimetal Thermostat

Usage conditions apply
The bimetal thermostat shows that dissimilar metals expand (or contract) at different rates, and thus may be used to close or open an electrical circuit at specific temperatures. Circuit is completed when temperature either rises above a certain point or falls below another point. Temperatures are set by two screws. The inscription reads "Chicago Apparatus Co. / Chicago USA."
Currently not on view
Object Name
bimetal thermostat
Woodrow Wilson High School
Chicago Apparatus Company
place made
United States: Illinois, Chicago
United States: Ohio, Youngstown
overall: 2 1/2 in x 2 in x 6 in; 6.35 cm x 5.08 cm x 15.24 cm
overall: 3 in x 6 in x 2 3/4 in; 7.62 cm x 15.24 cm x 6.985 cm
ID Number
catalog number
accession number
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History
Nominate this object for photography.   

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.


Add a comment about this object