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Patent Model of Edmondson's Circular Calculating Machine, 1883

Edmondson, Joseph and Blakey, Emmott & Company, Ltd.1883

The Henry Ford

The Henry Ford
Dearborn, MI, United States

Mechanical calculators used gears, cogs, levers, and rotating drums to solve mathematical problems indirectly. While Edmondson� s Circular Calculator was rugged and reliable, its "stepped drum" system required people to slide plates and levers, making it difficult to master and time-consuming to operate. By the late-19th century, improved adding machines became popular, helping to reduce the common errors of human calculation.

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  • Title: Patent Model of Edmondson's Circular Calculating Machine, 1883
  • Creator: Edmondson, Joseph, Blakey, Emmott & Company, Ltd.
  • Date Created: 1883
  • Location: United Kingdom, England, Halifax
  • Subject Keywords: Inventions, Models (Patent), Calculators
  • Type: Objects
  • Contributor: The Henry Ford
  • Original Source: Digital Collections
  • Patent Date: 1883
  • Object Name: Model (Patent)
  • Object ID: 31.1217.110
  • Manufacturer: Emmott & Company
  • Inventor: Joseph Edmondson
  • Invention: Circular Calculating Machine
  • Image ID: THF154094
  • Field: Mathematics
  • Credit: From the Collections of The Henry Ford. Gift of Edison Laboratories.
The Henry Ford

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