Comptometer Model A Section
date: label: date made
content: 1904
name: label: maker
content: Felt & Tarrant Manufacturing Company
notes: label: Description
content: This model has two columns of nine white plastic keys. Digits and complementary digits are indicated on the keys. Keys for odd digits are concave, those for even digits are flat. The mechanism is of steel and the two numeral wheels have white plastic rims. There are no subtraction levers, but there is a zeroing crank on the right. The entire model rests on a wooden base; there is no cover. The model was used as reference by Dorr E. Felt and J.A.V. Turck in developing the mechanism for production of the Model A Comptometer.
label: Description
content: Reference:
label: Description
content: Felt & Tarrant, 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
label: See more items in
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.323643
label: catalog number
content: 323643
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: 15.5 cm x 13.2 cm x 36 cm; 6 3/32 in x 5 3/16 in x 14 3/16 in