Burroughs Sample Calculator, 1/12 Fraction
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 made by Felt & Tarrant Manufacturing Company. The Burroughs calculator, as the new machine was called, performed ordinary decimal arithmetic. Burroughs inventors soon designed special versions of the calculator to solve other problems. This is the model or sample for one of them.
label: Description
content: This machine adds numbers up to four digits long and twelfths. It has four columns of nine keys, one column on the left with one key for zeroing the number wheel below, and one column on the right with two keys. There is no casing and one key top is missing. The frame is steel with black, white, and red plastic key tops. There are five plastic and metal numeral wheels at the front of the machine. The rightmost of these reads from 0 to 11 and is red. The other number wheels are black and read from 0 to 9. Three springs from the back of the machine are loose. A cloth cover is painted black.
label: Description
content: A red tag attached to the machine reads: PATENT DEPT. (/) #230. A white tag attached to the machine reads: 505000 (/) Dept. Model (/) 363 (/) 1/12 Frac Apr 24 (/) lpc. A metal label attached to the machine reads: DONATED TO (/) The Smithsonian Institution (/) by (/) Burroughs Corporation. The case is marked: Burroughs
label: Description
content: Models 1982.0794.44, 1982.0794.45, and 1982.0792.46 are all from Burroughs Patent Department model 230. This machine is the rightmost one in the images.
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: 1982.0794.45
label: catalog number
content: 1982.0794.45
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: cloth (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: overall: 11.4 cm x 14 cm x 27 cm; 4 1/2 in x 5 1/2 in x 10 5/8 in