Brunsviga Midget (Brunsviga Model M) Calculating Machine
date: label: date made
content: 1914
name: label: maker
content: Grimme, Natalis & Co.
notes: label: Description
content: This compact pinwheel lever-set manually operated non-printing calculating machine has a a steel mechanism and housing partly painted black. It has nine slots with levers for setting numbers. The levers rotate forward to set digits. A steel crank with a wooden handle that extends from the right side of the machine rotates backward (clockwise) for addition and multiplication and forward (counterclockwise) for subtraction and division. A wing nut on the left side zeros the setting levers.
label: Description
content: At the front of the machine is a movable carriage with 13 windows that show dials of the result register on the right and eight windows for the revolution register on the left. The revolution register has no carry. Digits in this register are white for addition and red for subtraction. The sliding decimal markers are on a rod over the result and revolution registers.
label: Description
content: Depressing a lever at the front of the machine releases the carriage for shifting. Rotating the wing nuts at the ends of the carriage zeros the registers on it. A bell is on the left end of the carriage.
label: Description
content: Marks on the front of the machine read: BRUNSVIGA-MIDGET; No 25209; and PATENT (/) G.N.& C.C.a.A. A mark on the back of the machine at the bottom reads: Patented in the United States 12 June 1906.
label: Description
content: The wooden case has a flat base and curved lid, with a handle, a lock, and a key on the right side.
label: Description
content: Compare MA.309542.
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
label: See more items in
content: Calculating Machines
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Oscar W. Richards
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.335656
label: catalog number
content: 335656
label: accession number
content: 1977.0143
label: maker number
content: 25209
objectType: label: Object Name
content: calculating machine
physicalDescription: label: Physical Description
content: steel (overall material)
label: Physical Description
content: wood (overall material)
label: Measurements
content: overall: 12.5 cm x 31.5 cm x 15.2 cm; 4 29/32 in x 12 13/32 in x 5 31/32 in