Odhner Arithmometer
date: label: date made
content: 1877
name: label: maker
content: Nobel, L.
notes: label: Description
content: This is one of the first calculating machines built on the design of Willgodt T. Odhner (1845–1905), a Swedish engineer working in St. Petersburg, Russia, in the factory of another Swede, Ludwig Nobel.
label: Description
content: In the early 1870s, Odhner sought to improve his fortune by inventing a calculating machine. He prepared a prototype in 1875, a model in 1876 and in 1877 arranged to have 14 machines built at the Nobel factory. This is one of these machines. Like Frank S. Baldwin of St. Louis, Odhner represented digits by retractable pins that extended from the edge of metal discs. Rotating the disc had an effect proportional to the number of protruding pins. Pinwheel calculating machines came to sell widely.
label: Description
content: This lever-set non-printing machine has a black cast–iron frame with eight brass pinwheels and a wooden base. Numbers are set by rotating the pinwheels forward using levers that extend from the wheels. Windows between the pinwheels show the number set. Commas are painted on the case to indicate decimal divisions.
label: Description
content: The carriage is at the front of the machine, with a seven-digit revolution counter at the very front and a ten-digit result register behind this. Seven brass screws rotate to set numbers in the revolution register. Rotating a wing nut on the right of the carriage zeros the result register, and turning a crank on the left of the revolution counter zeros it. A crank at the right end of the carriage may be designed to release it. A crank with an ivory knob on the right side of the machine is rotated counterclockwise for addition and multiplication and clockwise for subtraction and division.
label: Description
content: A mark at the top of the machine reads: W. Odhners (/) ARITHMOMETER. A second, underlined, mark there reads: L. Nobel. A third, underlined, mark there reads: St. Petersburg. The number “9” has been stamped several places that are visible when the case is opened. Specifically, it is found on the top edge of the bottom of the case and the bottom edge of the top of the case, on a gear inside the crank, and on the right side of each of the pinwheels. It also has a "9" on the inside of the carriage.
label: Description
content: Compare MA.323605.
label: Description
content: This machine was owned by Joseph S. McCoy, actuary of the U.S. Treasury Department.
label: Description
content: References:
label: Description
content: E. Martin, <I>The Calculating Machines (Die Rechenmaschinen)</I>, trans. P. A. Kidwell and M. R. Williams, Cambridge: MIT Press, 1992, esp. p. 67, figure 36.
label: Description
content: Timo Leipaelae, “The Life and Works of W. T. Odhner,” <I> Greifswalder Symposium zur Entwicklung der Rechentechnik</I>, ed. W. Girbardt, Greifswald: Univ. Greifswald, Inst. für Mathematik und Informatik, 2003 and 2006.
label: Location
content: Currently not on view
place: label: place made
content: Russia: Saint Petersburg, St. Petersburg
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Calculating Machines
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Mrs. Joseph S. McCoy
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.310231
label: accession number
content: 113246
label: catalog number
content: 310231
objectType: label: Object Name
content: calculating machine
physicalDescription: label: Physical Description
content: iron (overall material)
label: Physical Description
content: ivory (overall material)
label: Physical Description
content: brass (overall material)
label: Physical Description
content: wood (overall material)
label: Measurements
content: overall: 13.5 cm x 28 cm x 17.5 cm; 5 5/16 in x 11 1/32 in x 6 7/8 in