Summit Adding Machine

Description
By the mid-20th century, printing adding machines with a block of ten keys sold much more cheaply than full-keyboard machines. Mindful that it was losing sales, Burroughs Adding Machine Company of Detroit set out to manufacture its own ten-key machine. The Burroughs Patent Division acquired examples and blueprints of a recently introduced British adding machine, the Summit.
This manually operated example of the Summit has a steel case painted gray, a block of 12 number keys (for the 12 digits in Sterling currency), four keys on the right, and a “COR” key on the left. The metal crank on the right has a wooden handle. A place indicator is above the keyboard. The machine allows one to enter numbers up to nine digits long and prints nine-digit totals. The printing mechanism with paper tape is at the back. The paper tape is 6 cm. (2-3/8”) wide, with a serrated edge for tearing it off. A metal plate at the top lifts off for access to the mechanism and the black ribbon. The machine has wheels on the left and the right to advance the platen.
The machine is marked on the front: Summit. It is also marked there: MADE IN GREAT BRITAIN. It has serial number: #1885. A red Burroughs Patent Department tag attached to the machine reads: #300.
Compare to 1982.0794.77.
Location
Currently not on view
Object Name
adding machine
date made
1950
Physical Description
steel (overall material)
paper (overall material)
plastic (overall material)
Measurements
overall: 21 cm x 34 cm x 41.5 cm; 8 9/32 in x 13 3/8 in x 16 11/32 in
place made
United Kingdom: Great Britain
ID Number
1982.0794.76
maker number
#1885
accession number
1982.0794
catalog number
1982.0794.76
subject
Mathematics
Science & Mathematics
Adding Machines
See more items in
Medicine and Science: Mathematics
Adding Machines
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Burroughs Corporation

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