Adding Machine Section, Burroughs Model 534

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 is is a model for a key lock full stroke device for a key-driven adding machine. It is a steel mechanism with octagonal white plastic keys and two numeral wheels rimmed with black plastic. Keys for odd digits are concave, those for even digits are flat. Complementary digits are indicated on the keys. There are nine key stems and eight keys (the “9” key is missing).
A red tag attached to the object reads: PATENT (/) MODEL (/) No. 534. A metal tag on the side reads: B.A.M.CO. (/) MODEL (/) NO. 534
Objects 1982.0794.04 through 1982.0794.10 were received together as Burroughs Patent model 42. This object is described in accession file as an invention of Walter J. Pasinski of Burroughs. Pasinski and other Burroughs inventors filed several patents for key-driven adding machines between 1911 and 1929.
Currently not on view
Object Name
adding machine model
date made
ca 1920
Burroughs Adding Machine Company
Physical Description
plastic (overall material)
steel (overall material)
overall: 11.3 cm x 4.5 cm x 26.8 cm; 4 7/16 in x 1 25/32 in x 10 9/16 in
place made
United States: Michigan, Detroit
ID Number
accession number
catalog number
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Adding Machines
Data Source
National Museum of American History, Kenneth E. Behring Center


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