James Kelly obtained a patent for a table-top platform scale in 1856. This is the model he submitted with his patent application. The inscription on the dial reads “J. KELLY / SAG HARBOR.” That same year, Kelly showed “very accurate fractional scales” at the American Institute fair and took home a silver medal.

Ref: James Kelly, “Weighing Scale,” U.S. Patent 14,361 (March 4, 1856).

Date Made: 1856

Patented By: Kelly, James Q.Maker: Kelly, James Q.

Location: Currently not on view

Place Made: United States: New York, Sag Harbor

Subject: Weights & Measures


See more items in: Medicine and Science: Chemistry


Exhibition Location:

Data Source: National Museum of American History

Id Number: CH.308909Accession Number: 89797Catalog Number: 308909Patent Number: 14,361

Object Name: scaleObject Type: Patent ModelScales

Measurements: overall: 6 in x 11 in x 3 3/8 in; 15.24 cm x 27.94 cm x 8.5725 cmoverall: 6 in x 12 in x 6 1/2 in; 15.24 cm x 30.48 cm x 16.51 cm


Record Id: nmah_1674

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.