Levin Adding Machine
date: label: date made
content: 1906
name: label: maker
content: Levin, Judah L.
notes: label: Description
content: 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.
label: Description
content: 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.
label: Description
content: Judah Levin, the inventor of this adding machine, was an Orthodox rabbi in Detroit.
label: Location
content: Currently not on view
place: label: place made
content: United States: Michigan, Detroit
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Adding Machines
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Mr. A. J. Levin
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.311442
label: accession number
content: 147976
label: catalog number
content: 311442
objectType: label: Object Name
content: adding machine
physicalDescription: label: Physical Description
content: steel (overall material)
label: Physical Description
content: plastic (overall material)
label: Physical Description
content: leather (overall material)
label: Physical Description
content: velvet (overall material)
label: Physical Description
content: paper (overall material)
label: Measurements
content: 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