Adding Machine Section, Burroughs Model 581
date: label: date made
content: 1929
name: label: maker
content: Burroughs Adding Machine Company
notes: label: Description
content: 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 a model of a key lock for adding machines invented by Frederick Dame. It includes a steel mechanism with one white plastic key, two key stems without keys, and two black-plastic rimmed numeral wheels. A complete set of nine white plastic keys with key stems is attached to the model. All the keys are octagonal. Keys for odd digits are concave, and flat for even digits. Complementary digits are indicated on the keys.
label: Description
content: A metal tag attached to the object reads: B.A.M.CO. MODEL (/) NO. 581.
label: Description
content: Objects 1982.0794.04 through 1982.0794.10 were received together as Burroughs Patent model 42.
label: Description
content: Reference:
label: Description
content: Frederick Dame, “Key Mechanism for Calculating Machines,” U.S. Patent 1,791,265, filed August 12, 1929, granted February 3, 1931.
label: Location
content: Currently not on view
place: label: place made
content: United States: Michigan, Detroit
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Adding Machines
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Burroughs Corporation
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1982.0794.07
label: accession number
content: 1982.0794
label: catalog number
content: 1982.0794.07
objectType: label: Object Name
content: adding machine model
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Physical Description
content: steel (overall material)
label: Measurements
content: overall: 11 cm x 7 cm x 27 cm; 4 11/32 in x 2 3/4 in x 10 5/8 in