Marchant Model 8M Calculating Machine
date: label: date made
content: ca 1938
name: label: maker
content: Marchant Calculating Machine Company
notes: label: Description
content: This full-keyboard, non-printing electric proportional gear calculating machine has a metal case painted black . The eight columns of green and white color-coded plastic keys have a maroon clearance key at the bottom of each column. The underlying keyboard is painted gold. Between banks of keys are metal rods for decimal markers. 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 dials. Right of these is a column of 10 keys for automatic multiplication and two carriage shift keys. Left of the number keys is an on-off switch. 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 the entry register is a movable carriage with an 18-window result register and an eight-window revolution register. Sliding decimal markers for the registers are on the carriage. Pushing down a lever on the right side of the carriage allows manual movement of the carriage. Numbers are represented on this machine by the rotation of sets of gears on three shafts under the carriage.
label: Description
content: Marks on the right and left sides and on the back read: MARCHANT. A mark on the bottom reads: 8-M-112591. A mark on the back at the bottom reads: MADE IN U.S.A. A mark on the motor reads: GENERAL GE ELECTRIC (/) UNIVERSAL MOTOR.
label: Description
content: Compare to Harold T. Avery’s 1940 U.S. patents 2,216,659, 2,211,736, and 2,217,195.
label: Description
content: The Marchant Model M was introduced in 1935. The model 8M sold from 1935 until 1941
label: Description
content: Reference:
label: Description
content: <I>American Office Machines Research Service</I> vol. 3, 1938, section 4.3, p. 14–16, as well as section 4.13 under “Marchant.”
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
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of SCM Corporation, Business Equipment Division
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.335379
label: catalog number
content: 335379
label: accession number
content: 318944
label: maker number
content: 8-M-112591
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: 21.5 cm x 32 cm x 37 cm; 8 15/32 in x 12 19/32 in x 14 9/16 in