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More from TodayIFoundOut:
Who Invented the Taser?
https://youtu.be/Wbppcmru8eA
Who Invented Parkour?
https://youtu.be/yY8Tcx_MrQQ
In this video:
For years, the knife was the most commonly used tool to sharpen the wooden writing instrument known as a pencil (which historians believe was invented in the 15th or 16th century). But whittling the wood away to eventually produce a point was a time-consuming, tedious, and inexact process. As pencils became more ubiquitous in everyday life, it became apparent that a faster and more efficient way was needed to sharpen them. Luckily, two Frenchmen were up to the challenge.
Want the text version?: http://www.todayifoundout.com/index.php/2015/01/invention-pencil-sharpener/
Sources:
http://www.swinglineblog.com/05/history-pencil-sharpeners-2/
http://en.wikipedia.org/wiki/Jacques-Eug%C3%A8ne_Armengaud
https://www.google.com/patents/US12722?dq=No.+12,722&hl=en&sa=X&ei=Hj7IVKipBYaqgwSw5YCQDg&ved=0CCQQ6AEwAQ
https://www.google.com/patents/US594114?dq=pencil+sharpener&hl=en&sa=X&ei=5C9lVJr0MMeKsQT47YCQDQ&ved=0CFAQ6AEwBw
http://www.officemuseum.com/sharpener_small.htm
http://www.officemuseum.com/elec
