Levin Adding Machine

This ten-key non-printing manually operated adding machine has a steel and iron frame. The ten digit keys are arranged in two columns on the left side. Two rows of nine keys across the top indicate the place number of the digit entered. The front row is for addition and the other is for subtraction. To enter a number, both the digit key and the place key were depressed. Numbers through 9,999,999 can be indicated. The metal keys have plastic and paper key tops. The space under the keyboard is covered with green velvet. The result is indicated on a row of red number wheels below these two rows of keys. The machine is stored in a small black suitcase covered with leather, lined with cloth, and provided with a metal handle on top.
Compare to U.S. patent 815,542, dated March 20, 1906. Other Levin patents are 706,000, July 29, 1902,and 727,392, May 5, 1903.
Judah Levin, the inventor of this adding machine, was an Orthodox rabbi in Detroit.
Currently not on view
Object Name
adding machine
date made
Levin, Judah L.
Physical Description
steel (overall material)
plastic (overall material)
leather (overall material)
velvet (overall material)
paper (overall material)
overall: 25 cm x 39.5 cm x 15.4 cm; 9 27/32 in x 15 9/16 in x 6 1/16 in
place made
United States: Michigan, Detroit
ID Number
accession number
catalog number
Science & Mathematics
Adding Machines
See more items in
Medicine and Science: Mathematics
Adding Machines
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Mr. A. J. Levin

Visitor Comments

Add a comment about this object

Submit a comment or ask a question about this object using the form below. Submissions are moderated and may receive a curator response. Please note that we cannot evaluate or appraise your personal artifacts. For other questions or general inquiries please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Enter the characters shown in the image.