Simplex Calculating Machine
date: label: date made
content: ca 1925
notes: label: Description
content: This key-set, non-printing stepped drum calculating machine has a metal case painted black. Each of the nine columns of keys has nine black plastic keys. Between each row of keys, rods that are black on one side and white on the other serve as decimal markers. The crank for operating the machine angles out of the right side, at the front. A lever near it is marked Repeat in one position and Release in the other. In the front on the left is a lever that may be intended for shifting the carriage. Above the keyboard is a row of nine windows. This indicates a number set on the keys. On the left side is a lever. It is marked Subt.& Div. in one position and Add.& Mult. in the other.
label: Description
content: In back of the keyboard is a carriage with two rows of windows. The front row holds nine digits, and the back row, 16. On the right side of the carriage, a zeroing knob ia next to each row of windows. The machine has four rubber feet.
label: Description
content: A mark on the left front reads: Simplex. A mark under the carriage on the left side reads: 2741. A paper tag hanging from the object reads: 28.
label: Description
content: This machine closely resembles a Record calculating machine. Compare to MA.311949. It is number 28 in 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. 274–276.
label: Location
content: Currently not on view
place: label: place made
content: Germany: Berlin, Berlin
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Calculating 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.323612
label: accession number
content: 250163
label: catalog number
content: 323612
objectType: label: Object Name
content: calculating machine
physicalDescription: label: Physical Description
content: brass (overall material)
label: Physical Description
content: plastic (overall material)
label: Physical Description
content: steel (overall material)
label: Measurements
content: overall: 19.7 cm x 45 cm x 35 cm; 7 3/4 in x 17 23/32 in x 13 25/32 in