Our museum is temporarily closed to support the effort to contain the spread of COVID-19. Read a message from our director, and check our website and social media for updates.

Patent model for weighing scale

Patent model for weighing scale

Description (Brief)
This patent model demonstrates an invention for a balancing ball on a weighing scale; the invention was granted patent number 534839.
Currently not on view
Object Name
patent model
Object Type
Patent Model
date made
ca 1870
ca 1895
patent date
Heyer, Charles A.
Physical Description
metal (overall material)
overall: 3.8 cm x 32.4 cm x 4.2 cm; 1 1/2 in x 12 3/4 in x 1 5/8 in
ID Number
catalog number
accession number
See more items in
Work and Industry: Graphic Arts
Industry & Manufacturing
Patent Models
Patent Models, Graphic Arts
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