SCM Marchant Model SKA Calculating Machine

Description
This full-keyboard non-printing electric calculating machine has a metal frame painted blue and charcoal, and ten columns of color-coded blue-gray and white plastic keys. The rightmost three columns of keys are light blue; the next three, white; the next three, light blue; and the left column, white. Below the number keys is a row of blue keys with the numbers from 0 to 9. In front of them is a register with 10 keys. To the left are blue function keys and bars. Above the number keys is a row of ten windows that show the number entered.
Behind the entry register is a movable carriage with a 20-digit result register and an 11-digit revolution register. The entry register has sliding decimal markers; the registers on the carriage, flipping decimal markers. A socket for a cord is at the back, but no cord is present.
Marks on the sides and back of the machine read: MARCHANT. A mark on the bottom at the front reads: SKA 563169.
For related documents see MA*313984.02 through MA*313984.04.
Richard H. Hronik (1911–2003), the donor of this machine, held a number of patents in transportation engineering and did design work relating to railroad systems built for the Indian government. He went on to work for the firm of Melpar as a materials science engineer. He made donations to several Smithsonian units, including Electricity and Civil Engineering.
References:
Electricity Collections, National Museum of American History.
Fédération Nationale des Chambres Syndicales de la Mécanographie, Fédération de Reprise officielle des Machines à Ecrire, Machines à Calculer . . ., Lyon, 1970, p. 71.
Location
Currently not on view
Object Name
calculating machine
date made
1957
maker
SCM
Physical Description
metal (overall material)
rubber (overall material)
plastic (overall material)
Measurements
overall: 21.3 cm x 41 cm x 40 cm; 8 3/8 in x 16 5/32 in x 15 3/4 in
ID Number
MA*334384
catalog number
334384
accession number
313984
maker number
SKA 563169
subject
Mathematics
Science & Mathematics
Calculating Machines
See more items in
Medicine and Science: Mathematics
Calculating Machines
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Richard H. Hronik

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