Tripti Joshi (Editor)

Emily C Duncan

Updated on
Edit
Like
Comment
Share on FacebookTweet on TwitterShare on LinkedInShare on Reddit
Name
  
Emily Duncan


Emily C. Duncan Emily C Duncan Alvis 1835 1909 Find A Grave Memorial

Emily C. Duncan received two patents in 1903 and 1904 for banking-related calculators. Duncan was born in 1849 in Coral, Illinois as Emily Cornelius Forbes and later resided in Centralia, Wisconsin (which later became Wisconsin Rapids) and Jennings, Louisiana. She invented new banking calculators and was mentioned in Inventive Age magazine in February 1905. Duncan was recognized as one of many women who worked in the age of technology before the actual computer. She was married to inventor James Eugene Duncan and although he was believed to be the only inventor in the family written accounts from her granddaughter indicated she assisted her husband with numerous inventions.

Emily C. Duncan Emily C Duncan Alvis 1835 1909 Find A Grave Memorial

Based on her written statement provided in the original patent application she stated that her goal was to provide a “simple and readily understood structure with which computations ordinarily requiring considerable time and care may be accurately and quickly made”. The other objective of her invention was “to provide a device of the above character in which parts may be readily substituted, so that computations of different kinds may be made”.

The first apparatus was intended for computing interest in 1 at six, seven, or eight per cent. The calculator was first designed to easily be used by any mathematician, but her original patent provided detailed illustration of two apparatuses with details explaining how the calculator was to be operated. The invention was designed more specifically for computing in hundreds

In 1904, she received another patent for an invention relating to improvements in calculators. Her objective of this invention was to improve the construction of time-calculators and to provide a more durable device designed primarily for determining the number of days between any two dates within a year with absolute accuracy.

References

Emily C. Duncan Wikipedia