Bunzel Calculating Machine
date: label: date made
content: ca 1910
name: label: maker
content: Bunzel-Delton-Werk Fabrik...
notes: label: Description
content: This stepped drum, manually operated non-printing calculating machine has a brass and steel mechanism that fits snugly in a wooden case. Each of the seven levers for setting digits has a stepped drum below it. The brass plate that covers the drums is painted black. Slits in the plate allow the levers and other parts to move. The edges of the slits next to digit levers are numbered from 0 to 9 to indicate the number entered. An ADD. MULT. / SUB. DIV. lever is left of the digit levers. A compartment covered by a slate is left of this. The operating crank is right of the levers.
label: Description
content: The carriage behind the levers has seven windows for the revolution counter register, and 12 windows for the result register. It can be placed at seven different positions. A mark on the cover plate assists in positioning the carriage. Holes for decimal markers are between the levers and between the holes of the registers, as well as sliding decimal markers for the result register. Thumbscrews allow one to set numbers in the registers. Zeroing levers for these registers on the right of the carriage may be operated jointly or individually. The case has two legs that may be used to set it at an angle, as well as a lock and key.
label: Description
content: A mark to the left of the levers reads: BUNZEL (/) TRADE DELTON MARK. Left of this is the mark: FACTORY VIENNA. The serial number, on the edge of the case at the back, is 5310.
label: Description
content: Hugo Bunzel, a calligraphy teacher and former painter in Prague, designed the machine, which was introduced in 1908 and produced through 1915. It was manufactured in Vienna. This example is from the collection of Felt & Tarrant Manufacturing Company.
label: Description
content: Reference:
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. 198–199.
label: Location
content: Currently not on view
place: label: place made
content: Austria: Vienna state, Vienna
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 Victor Comptometer Corporation
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.323585
label: catalog number
content: 323585
label: accession number
content: 250163
label: maker number
content: 5310
objectType: label: Object Name
content: calculating machine
label: Other Terms
content: calculating machine; Stepped Drum, Manual, Non-Listing
physicalDescription: label: Physical Description
content: brass (overall material)
label: Physical Description
content: steel (overall material)
label: Physical Description
content: wood (overall material)
label: Physical Description
content: slate (overall material)
label: Physical Description
content: german silver (overall material)
label: Measurements
content: overall: 16.2 cm x 50.4 cm x 21.2 cm; 6 3/8 in x 19 27/32 in x 8 11/32 in