Friden Model CH10 Calculating Machine
date: label: date made
content: 1936
name: label: maker
content: Friden Calculating Machine Company, Inc.
notes: label: Description
content: In 1936, the young Friden Calculating Machine Company not only moved from Oakland, California, to a new factory in San Leandro, but introduced several new models. These included the manually operated H8 (with eight columns of keys) and H10 (with ten columns of keys), as well as the electrically operated F8 and F10. This machine matches the description of the H8, although a mark at the front of the base reads: CH-8-50004. If this is an H8, the serial number dates it to 1936.
label: Description
content: The slightly greenish black machine is largely of metal with plastic keys, a wooden handle on the operating crank on the right side, and rubber around the joints. The 8 x 9 x 17 device has eight columns of color-coded keys for entering numbers. At the back, on the moveable carriage, are a nine-digit revolution register and a seventeen-digit result register. Rotating decimal marker rods separate the columns of keys and the registers on the carriage have sliding decimal markers. These registers also have zeroing rods on the right of the carriage. The mechanism of the machine is a modified form of stepped drum.
label: Description
content: A mark on both sides reads: FRIDÉN. A mark on the back at the bottom reads: MADE IN U.S.A. The dimensions depend on the position of the carriage.
label: Description
content: Compare 1982.0243.01, and electrically operated C10 from about the same year.
label: Description
content: According to the donor, this calculating machine was found in a home that once belonged to Smithsonian Secretary Charles G. Abbot (1872-1973), with documents and other objects that once belonged to Abbot.
label: Description
content: References:
label: Description
content: Accession File.
label: Description
content: <I>American Office Machines Research Service</I>, III, especially Sections 4.3 and 4.31,1938.
label: Description
content: <I>Friden Age List</I>, Photo-Reprint by Office Machine Americana, Lewiston, Idaho, p. 2.
label: Location
content: Currently not on view
place: label: place made
content: United States: California
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 Margaret L. Higdon
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2019.0292.01
label: accession number
content: 2019.0292
label: catalog number
content: 2019.0292.01
objectType: label: Object Name
content: calculating machine
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: plastic (keys material)
label: Physical Description
content: wood (handle material)
label: Physical Description
content: rubber (edging material)
label: Measurements
content: overall: 22.5 cm x 47 cm x 37 cm; 8 27/32 in x 18 1/2 in x 14 9/16 in