Brunsviga Model C Calculating Machine
date: label: date made
content: ca 1898
name: label: maker
content: Grimme, Natalis & Co.
notes: label: Description
content: In 1892 the German firm of Grimme, Natalis & Company in Braunschweig, which had specialized in sewing machines, purchased the rights to manufacture pinwheel calculating machines on the design of the Swede W. T. Odhner. Under the leadership of the engineer Franz Trinks, they began manufacturing and improving a machine called the Brunsviga. This is a relatively early example.
label: Description
content: The lever-set non-printing manually operated machine has a brass and steel mechanism and a metal frame, painted black, with an iron base. Seven slots in the front have levers moved forward to release pins on pinwheels below and set a number. A brass crank with a wooden handle on the right side of the machine rotates backward (clockwise) for addition and multiplication and forward (counterclockwise) for subtraction and division.
label: Description
content: At the front of the machine, a movable carriage carries ten windows that show dials of the result register on the right and eight windows for the revolution register on the left. Holes for decimal markers above the registers presently contain no markers. Depressing a lever at the front of the machine releases the carriage for shifting. An arrow on the left of the cover of the machine points to the wheel of the revolution counter that will be affected by turning the crank when the carriage is in any one position. Rotating wing nuts at the ends of the carriage zeros the registers on it.
label: Description
content: Marks on the top of the machine read: BRUNSVIGA, and: No1750. A mark at the top of a list of patents on the left side of the machine reads: Grimme, Natalis & Co.(/) Braunschweig - Brunswick (/) Patente:W.T. Odhner. The patents are from Germany, Belgium, England, Austria, Sweden, Norway, Switzerland, Hungary, Russia (no number), Luxembourg (no number), and the United States (no number).
label: Description
content: This machine came to the Smithsonian from the personal collection of Brooklyn high school teacher L. Leland Locke.
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, pp. 109–113.
label: Description
content: E. Anthes, “Zur Datierung von Brunsviga-Rechenmaschinen, <I>Leertaste</I>, Nr. 6, August, 1982.
label: Description
content: F. Schellstede, “Brunsviga. Produktionxzahlen, Absatzzahlen, Werbung. Versuch einer kurzen geschichtlichen Darstellung,” Kassel, 1990.
label: Description
content: “Sixty Years of Brunsviga,” <I>Business Equipment Topics</I> vol. 80 (April, 1932), p. 46.
label: Location
content: Currently not on view
place: label: place made
content: Germany: Lower Saxony, Brunswick
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Calculating Machines
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of L. Leland Locke
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.311947
label: catalog number
content: 311947
label: accession number
content: 155183
label: maker number
content: 1750
objectType: label: Object Name
content: calculating machine
physicalDescription: label: Physical Description
content: steel (overall material)
label: Physical Description
content: brass (overall material)
label: Physical Description
content: wood (overall material)
label: Measurements
content: overall: 12 cm x 29.6 cm x 15.4 cm; 4 23/32 in x 11 21/32 in x 6 1/16 in