Comptometer Section, Model F, 1/6 Fraction
date: label: date made
content: 1915
name: label: maker
content: Felt & Tarrant Manufacturing Company
notes: label: Description
content: This is an experimental model of a section of a full-keyboard non-listing adding machine. It has one column of five white plastic keys on the right, two partial columns of black keys in the center, and one column of nine black keys on the left. Complementary digits are indicated. The keys are alternately concave (odd digits) and flat (even digits). There are four numeral dials at the front, a zeroing lever on the right side, and a red button on the right behind the keyboard. The dial in the rightmost position is numbered zero to 5 and is slightly smaller than the others. There are two subtraction levers and no decimal markers. There is no base and no cover.
label: Description
content: A mechanism to record fractional sixths or sixtieths, it was built at Felt & Tarrant Manufacturing Company in Chicago, but not produced. It was in the collections of Felt & Tarrant, and came to the Smithsonian from the successor firm of Victor Comptometer Corporation.
label: Description
content: Reference:
label: Description
content: Accession Journal 1991.3107.06
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, Chicago
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Adding Machines
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Victor Comptometer Corporation
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.323637
label: catalog number
content: 323637
label: accession number
content: 250163
objectType: label: Object Name
content: adding machine section
physicalDescription: label: Physical Description
content: steel (overall material)
label: Physical Description
content: plastic (overall material)
label: Physical Description
content: wood (overall material)
label: Measurements
content: overall: 14 cm x 15 cm x 35 cm; 5 1/2 in x 5 29/32 in x 13 25/32 in