Marchant Model ACR8M Calculating Machine
date: label: date made
content: ca 1943
name: label: maker
content: Marchant Calculating Machine Company, Inc.
notes: label: Description
content: This full-keyboard, non-printing electric proportional gear calculating machine has a metal case painted gray and eight columns of green and white color-coded oval plastic keys. A red clearance key is at the bottom of each column. The underlying keyboard is light gray. Between banks of keys are metal rods for decimal markers.
label: Description
content: Right of the number keys are auto divide and stop keys, subtraction and addition bars, shift keys for use in multiplication, and a reverse key. In front of these are clearance keys for the keyboard, the tab setting, and the dials. Right of these is a column of ten keys for automatic multiplication and two carriage shift keys. Above the number keys is a row of eight windows to show a number set up (the decimal markers extend from between the number keys to between these windows).
label: Description
content: Behind this register is a movable carriage with an 16-window result register and a nine-window revolution register. Decimal markers slide above the registers on the carriage. To the left of the revolution register is a row of six buttons used in setting tabs. The motor is at the back of the machine, inside the case. Numbers are represented by the rotation of sets of gears on three shafts under the carriage.
label: Description
content: A mark on the sides and back of the machine reads: MARCHANT. A metal tag attached to the bottom reads: ACR8M-190554
label: Description
content: The machine has a green rubber cord and a gray plastic cover. A label on the front is from an office supply store in Baltimore, Md.
label: Description
content: Compare to Harold T. Avery’s 1940 U.S. patents 2,216,659, 2,211,736, and 2,217,195. See 1979.3084.106 for related trade literature. The model ACR8M was manufactured from at least 1942 until 1948.
label: Location
content: Currently not on view
place: label: place made
content: United States: California, Oakland
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 Walton G. Banks, Inc.
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1984.0682.03
label: catalog number
content: 1984.0682.03
label: accession number
content: 1984.0682
label: maker number
content: ACR8M-190554
objectType: label: Object Name
content: calculating machine
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: plastic (overall material)
label: Physical Description
content: rubber (overall material)
label: Measurements
content: overall: 21 cm x 32.5 cm x 37 cm; 8 9/32 in x 12 25/32 in x 14 9/16 in