All inventions begin with a spark of inspiration. Electrical #engineer Edith Clarke invented a graphic calculator that aided her work, as well as that of other engineers. Clarke’s calculator greatly simplified calculations to determine electrical characteristics of long electrical transmission lines, improving the distribution system.
Learn more about Clarke: http://bit.ly/3qMVaHN NationalEngineersWeek
U.S. Patent no. 1,552,113
Title: [Graphical] Calculator
Patented: September 1, 1925