Comptometer Model C, British Currency Indexer
date: label: date made
content: 1909
name: label: maker
content: Felt & Tarrant Manufacturing Company
notes: label: Description
content: This full-keyboard non-printing adding machine has a steel frame painted black, a steel mechanism, and eight columns of black and white plastic keys, with complementary digits indicated. The rightmost column has three black keys and indications of quarters from 1/4 to 3/4. The second column has eleven white keys. The third column has nine black keys. The fourth column from the right has one black key. The four left columns have nine keys each. The keys are alternately concave (odd digits) and flat (even digits). The machine is designed for calculations involving pounds, shillings, and pence.
label: Description
content: Thesubtraction levers are at the front of the columns of keys, decimal indicators in front of these, and nine windows covered with clear plastic that show the result. The wheel in the first position is divided to read eighths. A zeroing lever is on the right side. At the back of the machine is a metal attachment painted black that holds five paper-covered dials. Four of these dials are covered with metal shutters. The shutters are opened manually by pressing down on the key directly below the shutter. The shutter is then locked in position. A release lever on the left side closes the shutter. A knob on the left side manually rotates the dials. The entire instrument is designed to make it easier to multiply units of British currency. The machine has serial number 33077.
label: Description
content: A label received with the object indicates that the British Currency Indexer was made approximately in 1914.
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
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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.323654
label: maker number
content: 33077
label: catalog number
content: 323654
label: accession number
content: 250163
objectType: label: Object Name
content: adding machine
physicalDescription: label: Physical Description
content: paper (overall material)
label: Physical Description
content: metal (overall material)
label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: 21 cm x 25 cm x 37 cm; 8 9/32 in x 9 27/32 in x 14 9/16 in