Grant Calculating Machine
date: label: date made
content: 1893
name: label: maker
content: Grant, George B.
notes: label: Description
content: In the early 1890s, as the Columbian Exposition in Chicago drew near, George B. Grant once again turned his attention to improvements in calculating machines. According to the donor, this model represents his first attempt to improve on his 1876 machine.
label: Description
content: The non-printing, barrel-type machine has a wooden base, metal plates for a frame on each side, and four cross shafts that are linked by gears. When the handle on the right side is turned, two of the shafts rotate. The upper of these shafts has eight geared, rotating rings on a common collar. This collar may be moved to several positions along the shaft.
label: Description
content: The lower shaft has ten geared wheels. There is space for numbers to be written on the rim of both the upper and the lower wheels. Each of the upper wheels has one tooth in its gear that protrudes further than the others. The back shaft has ten components on it that may be designed to link the upper wheels to those below.
label: Description
content: This machine was given to the museum by George B. Grant’s half-brother, Edwin A. Bayley.
label: Description
content: Reference:
label: Description
content: Accession file.
label: Location
content: Currently not on view
place: label: place made
content: United States: Massachusetts, Lexington
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 Edwin A. Bayley
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.310646
label: catalog number
content: 310646
label: accession number
content: 118852
objectType: label: Object Name
content: calculating machine model
physicalDescription: label: Physical Description
content: wood (overall material)
label: Physical Description
content: steel (overall material)
label: Physical Description
content: brass (overall material)
label: Measurements
content: overall: 18 cm x 27.5 cm x 11.6 cm; 7 3/32 in x 10 13/16 in x 4 9/16 in