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
date made
Levin, Judah L.
place made
United States: Michigan, Detroit
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
ID Number
accession number
catalog number
Credit Line
Gift of Mr. A. J. Levin
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Adding Machines
Data Source
National Museum of American History


The congregation Judah Levin belonged to is known as Shaarey Zedek and at the time of 1906 was located at Brush & Winder Street in Detroit Michigan. The Granddaughter of Rabbi Judah Levin is the historian of Sharrey Zedek that is now in Southfield Michigan.

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