Comptometer Model E
date: label: date made
content: 1913
name: label: maker
content: Felt & Tarrant Manufacturing Company
notes: label: Description
content: This full-keyboard non-printing adding machine has a brown metal case, eight rows of plastic keys for entering numbers that are colored according to the place value of the digits entered, eight subtraction levers with decimal markers, and a row of nine windows at the front of the machine to show the result. Complementary numbers are indicated on the keys. Keys for odd digits are concave, and those for even ones are flat. There is a button on the upper right of the keyboard and a zeroing lever on the right side. The machine featured an error-locking mechanism. Metal “wings” extending on the right and left side of each key are introduced as part of an “individual key lock” mechanism.
label: Description
content: The machine has serial number 61612. The last patent date on the metal tag behind the keyboard is: JUN.7.10.
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.323647
label: maker number
content: 61,612
label: catalog number
content: 323647
label: accession number
content: 250163
objectType: label: Object Name
content: adding machine
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: plastic (overall material)
label: Physical Description
content: wood (overall material)
label: Measurements
content: overall: 14 cm x 24 cm x 36.2 cm; 5 1/2 in x 9 7/16 in x 14 1/4 in