Monroe Model 8N-213 Calculating Machine
date: label: date made
content: 1960
name: label: maker
content: Monroe Calculating Machine Company, Inc.
notes: label: Description
content: This fully automatic electric non-printing modified stepped drum calculating machine has a gray and black steel frame, and ten columns of gray and white oblong plastic keys. At the bottom of each column is a key for clearing it. Between the columns of keys and under the keyboard are metal rods which turn to serve as decimal markers. They are painted white on one side and the same black as the case on the other.
label: Description
content: To the right of the number keys are subtraction and addition bars, two carriage shift keys, and a green enter multiplier key. Below these are three levers, one to set repeated entries, one for multiplication, and one for non-entry. Below these are three red keys relating to entering the dividend, a gray keyboard clearance key, and a lock lever. Beneath the number keys are five keys relating to multiplication and division. A DIVD ALIGN key is left of these.
label: Description
content: The carriage in back of the keyboard has ten dials to show a number set up for multiplication, 21 dials to show the result, and a row containing ten white dials and then 11 black dials. Sliding decimal markers are provided. The dials showing numbers set up for multiplication can be set at any of five positions. A metal piece slides over the windows for these dials to indicate the decimal point. A gray electrical cord attaches to the back. The gray cover is separate.
label: Description
content: A mark on the carriage reads: MONROE. The same mark is on the back of the machine, with the Monroe logo trademarked in 1956. A mark on both right and left sides reads: MONROmatic. A paper sticker glued to the bottom of the machine reads: MONROE (/) CALCULATING MACHINE (/) COMPANY, INC. (/) ORANGE, N.J. U.S.A.. It also is marked with patent numbers that range from 2,250,403 to 2,732,129. The second patent date is from 1953. A metal tag attached to the bottom of the machine reads: MODEL 8N-213 (/) SERIAL B973812B. There is no mention of Litton Industries, which acquired Monroe Calculating Machine Company in 1958.
label: Description
content: According to the accession file, the machine was purchased by the University of Pittsburgh 14 September 1960, at a cost of $880, for use in parapsychological research.
label: Description
content: Compare to MA.335425 and 1984.3046.01.
label: Description
content: Reference:
label: Description
content: Accession file.
label: Location
content: Currently not on view
place: label: place made
content: United States: New Jersey, Orange
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 University of Pittsburgh
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1980.0255.01
label: catalog number
content: 1980.0255.01
label: maker number
content: B973812B
label: accession number
content: 1980.0255
objectType: label: Object Name
content: calculating machine
physicalDescription: label: Physical Description
content: rubber (overall material)
label: Physical Description
content: plastic (overall material)
label: Physical Description
content: steel (overall material)
label: Measurements
content: overall: 20.5 cm x 37 cm x 34.2 cm; 8 1/16 in x 14 9/16 in x 13 15/32 in