Burroughs Sample Calculator, Hours and Minutes
date: label: date made
content: ca 1920
name: label: maker
content: Burroughs Adding Machine Company
notes: label: Description
content: In 1911, the Burroughs Adding Machine Company introduced a key-driven adding machine much like the Comptometer produced by Felt & Tarrant Manufacturing Company. The Burroughs calculator, as the new machine was called, performed ordinary decimal arithmetic, like most adding machines. Burroughs inventors soon designed special versions of the calculator to solve other problems. This is a model or sample of one of them.
label: Description
content: The machine adds hours and minutes. It has five columns of black and red color-coded plastic keys. Three columns have nine black keys, one right of these has five red keys, then the rightmost column has nine red keys. The two red columns represent minutes and tens of minutes, with carrying when the total reaches 60. Left of the number keys is a single key that is used to zero the leftmost numeral wheel. The keyboard is painted green. Six numeral wheels at the front of the machine show the result. Hours are represented on black wheels, and minutes on red ones. The machine has a black metal frame and four rubber feet. The fabric cover is painted black. One black key is missing, as are at least two screws for the case.
label: Description
content: A red paper tag attached to the machine reads: PATENT DEPT. (/) #230. A white tag attached to the machine reads: 50500 (/) Dept Model (/) 363 (/) Hr & Min (/) Apr 24 (/) lpc. Another white tag attached to the machine reads: Reference Machine (/) 5 Columns (/) Hours & Minutes. A metal tag attached to the object reads: DONATED TO (/) The Smithsonian Institution (/) by (/) Burroughs Corporation.
label: Description
content: Models 1982.0794.44, 1982.0794.45 and 1982.0792.46 are all from Burroughs Patent Dept. model 230. This object is the leftmost one in the photographs.
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: 1982.0794.44
label: catalog number
content: 1982.0794.44
label: accession number
content: 1982.0794
objectType: label: Object Name
content: adding machine model
physicalDescription: label: Physical Description
content: plastic (overall material)
label: Physical Description
content: paper (overall material)
label: Physical Description
content: glass (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 12.3 cm x 16 cm x 28.6 cm; 4 27/32 in x 6 5/16 in x 11 1/4 in