Burroughs Class 9 Subtractor

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This model of a section of a Burroughs Class 9 adding machine has a steel mechanism in a steel framework painted brown. It has one column of black plastic number keys, and one column of red and white plastic function keys. There is part of a carriage, part of a printing mechanism, and a place for one spool of a ribbon. The mechanism is on a metal support that fits into a wooden stand. There is no cover for the sides.
The Burroughs Class 9 was introduced in 1926. This is model #241 Patent Division of Burroughs Corporation, although there is no departmental tag. A metal tag attached to the object reads: DONATED TO (/) The Smithsonian Institution (/) by (/) Burroughs Corporation.
Currently not on view
date made
ca 1926
Burroughs Adding Machine Company
place made
United States: Michigan, Detroit
Physical Description
plastic (overall material)
metal (overall material)
wood (overall material)
paper (overall material)
overall: 46 cm x 25 cm x 38 cm; 18 1/8 in x 9 27/32 in x 14 31/32 in
ID Number
catalog number
accession number
Credit Line
Gift of Burroughs Corporation
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Adding Machines
Data Source
National Museum of American History


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