Burroughs Adding Machine Section

Description
This is one of a series of adding machines and adding machine models prepared by the Patent Department of the Burroughs Adding Machine Company. It has a steel mechanism with octagonal black plastic keys and plastic numeral wheel rims. Keys for odd digits are concave, those for even digits are flat. Complementary digits are indicated on the keys. The object consists of a single bank of nine plastic keys with numbers and complements of numbers indicated. There are two numeral wheels and a spring-driven lever. Described in accession file as “Full Stroke & Key-Lock Device” by J. J. Morse, it is one of seven models (1982.0794.04 through 1982.0794.10) that formed Burroughs Patent Dept. 42.
The machine is marked on a metal tag on the side: B.A.M. CO. (/) MODEL (/) NO. 418.
John J. Morse of Cleveland, Ohio, took out U.S. Patent 1,510,951 for a “key-driven calculating machine” on October 7, 1924 (application date October 5, 1923), and assigned this patent to Burroughs Adding Machine Company. His patent was concerned with preventing incomplete key action, and hence erroneous calculations, on a key-driven adding machine.
Location
Currently not on view
Object Name
adding machine section
date made
ca 1920
maker
Burroughs Adding Machine Company
Physical Description
plastic (overall material)
steel (overall material)
Measurements
overall: .1 cm x 4.5 cm x 26.3 cm; 1/32 in x 1 25/32 in x 10 11/32 in
place made
United States: Michigan, Detroit
ID Number
1982.0794.04
catalog number
1982.0794.04
accession number
1982.0794
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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