Marchant Model 10D Calculating Machine
date: label: date made
content: 1942
name: label: maker
content: Marchant Calculating Machine Company, Inc.
notes: label: Description
content: This full-keyboard, non-printing electric proportional gear calculating machine has ten columns of green and white oval plastic keys. A red clearance key is at the bottom of each column. Rods between the columns of keys turn to serve as decimal markers. The rods and the keyboard are painted brown on one side. The rods are white on the other side. A row of windows above the keys shows the digits entered. To the right are addition, subtraction, multiplication, and SHORT CUT bars; clearance keys for the keyboard, the middle dial, and the upper dial; automatic divide and stop keys; and carriage shift keys.
label: Description
content: Behind the keyboard is a movable carriage with a ten-digit revolution register and a 20-digit result register. The registers have sliding decimal markers. A lever on the right can be depressed to release the carriage. The machine has four rubber feet, a rubber electric cord, and a plastic cover.
label: Description
content: The sides and back are marked: MARCHANT. The serial number tag attached to the base reads: 10-D-157365. Penciled on the base are the dates 10-9-45 and 9-27-43. A paper label on the base reads: Manufactured by (/) MARCHANT CALCULATING MACHINE COMPANY, Inc. (/) OAKLAND, CALIFORNIA, U. S. A. (/) Made in U.S.A. (/) United States Patent 1640493. It also reads: 2229630. It also reads: Canada, Patented 1931, 1933, 1936, 1940. A mark on the cover reads: OFFICE MACHINES CO. (/) SALES & SERVICE (/) 2330 WYOMING (/) 532-5655
label: Description
content: This model was the first of the Marchant “Silent Speed” machines. It was advertised as having “The Silent Speed of Lightning without the Thunder.” The model 10D was manufactured from 1934 to 1942. This example was owned and used by Curtis R. Taylor (b. 1902). Taylor became interested in surveying while serving in the U. S. Army, and took a correspondence course on the subject after his discharge. He worked for several years as a surveyor in Colorado and New Mexico, and became interested in civil engineering. Studying mathematics and engineering on his own, he took and passed the licensing examination in civil engineering in the state of Texas in 1948. He then worked for government agencies such as the Texas State Highway Department, the City of Houston, and Prince Georges County, Md.
label: Description
content: Mr. Taylor carried his Marchant calculating machine in a battered white suitcase which was in poor condition when it arrived at the Museum and was not retained.
label: Description
content: For related documentation, the pamphlet “Marchant Methods for Highway & Railroad Engineers,” see 1999.0139.02.
label: Description
content: References:
label: Description
content: SCM Collection.
label: Description
content: Accession File.
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
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content: Calculating Machines
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Jo Ann T. Holmes
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1999.0139.01
label: catalog number
content: 1999.0139.01
label: maker number
content: 10-D-157365
label: accession number
content: 1999.0139
objectType: label: Object Name
content: calculating machine
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: rubber (overall material)
label: Physical Description
content: plastic (overall material)
label: Measurements
content: overall: 21.4 cm x 38.5 cm x 37 cm; 8 7/16 in x 15 5/32 in x 14 9/16 in