Burroughs Adding Machine

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The Burroughs Adding Machine Company, long a manufacturer of full-keyboard adding machines, faced stiff competition from less expensive ten-key adding machines. In response, in 1954 they introduced their own versions of the machine, based on the British Summit. This is a prototype, designed for British currency.
The manually operated printing machine accepts nine-digit entries and prints nine-digit totals. The gray metal machine has 11 white plastic keys in a block, numbered from 1 to 11. There also is a white zero bar and a white key labeled with a pound sterling symbol. There are 4 brown function keys right of the digit keys that are labeled ST, T, -, and R. The place indicator is in back of the keyboard and the printing mechanism, with 2-1/4” carriage, behind this. The ribbon is black. A lid lifts off the top for access to the ribbon and printing mechanism. The top part of a wheel is exposed through the case to allow one to advance the paper tape. A serrated edge assists in tearing off the paper tape.
The machine is marked in back of the keyboard: Burroughs. A red tag attached to the object reads: PATENT DEPT. (/) #330. A metal tag attached to the object reads: DONATED TO (/) The Smithsonian Institution (/) by (/) Burroughs Corporation.
Burroughs sold ten-key adding machines through at least 1965.
Compare to Summit adding machines 1982.0794.76 and 1982.0794.77, and Burroughs adding machine 1982.0794.85.
Currently not on view
date made
ca 1950
Burroughs Adding Machine Company
place made
United States: Michigan, Detroit
Physical Description
metal (overall material)
paper (overall material)
rubber (overall material)
plastic (overall material)
overall: 22.2 cm x 31 cm x 42.5 cm; 8 3/4 in x 12 7/32 in x 16 23/32 in
ID Number
accession number
catalog 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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