Burroughs Style P401 Adding Machine, 18 Fraction

Burroughs Style P401 Adding Machine, 1/8 Fraction

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This full-keyboard printing electric machine has a tan metal case and tan, brown and black keys. There are nine columns of keys with nine keys in each column, one column of seven keys (eighth fraction keys), one column of five function keys and two levers, and one column with addition and subtraction bars. A narrow carriage behind the keyboard has a plastic serrated edge for tearing the paper tape. The top lifts off for access to the ribbon and the printing mechanism. The machine has four rubber feet, and no cord.
The machine is marked above the keyboard: Burroughs. It is marked on a metal tag attached to the bottom: B3595. A red tag attached to it reads: PATENT DEPT. (/) #262. A metal tag attached to the object reads: DONATED TO (/) The Smithsonian Institution (/) by (/) Burroughs Corporation.
This is model #262 from the Patent Division of Burroughs Corporation.
The Burroughs series P400 adding machine was introduced in 1952.
Currently not on view
Object Name
adding machine
date made
ca 1952
place made
United States: Michigan, Detroit
Physical Description
plastic (overall material)
metal (overall material)
rubber (overall material)
paper (overall material)
overall: 25.8 cm x 16 cm x 39.3 cm; 10 5/32 in x 6 5/16 in x 15 15/32 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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