Marchant Model 10M Calculating Machine
date: label: date made
content: 1935
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 and ten columns of tan and white plastic keys. A maroon clearance key is at the bottom of each column. The underlying keyboard is painted gold. 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 dials. Right of these is a column of ten 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 ten 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 20-window result register and an 11-window revolution register. Numbers are represented by the rotation of sets of gears on three shafts under the carriage. Sliding decimal markers for the registers on the carriage are provided. Pushing down a lever on the right side of the carriage allows manual movement of it. The motor is at the back of the machine, inside the case. The machine has four rubber feet.
label: Description
content: Marks on the right and left sides and on the back read: MARCHANT. A mark on the bottom reads: 10-M-104367. A torn paper label on the bottom reads: silent (/) speed.
label: Description
content: The 10M sold from 1935 into the 1940s. In 1939, the GSA price was $552.50, and the regular price was $600 to $650. A service contract was $25/yr at GSA rates. The earliest model 10Ms had serial numbers in the 104,000s.
label: Description
content: References:
label: Description
content: Harold T. Avery, U.S. Patents, 1940, 2,216,659, 2,211,736, and 2,217,195.
label: Description
content: Also see <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: Description
content: SCM Collection, 1984.3084.88.
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 SCM Corporation, Business Equipment Division
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.335377
label: catalog number
content: 335377
label: accession number
content: 318944
label: maker number
content: 10-M-104367
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 38.1 cm x 37 cm; 8 9/32 in x 15 in x 14 9/16 in