light switch

In 1884 John Henry Holmes was sitting in his house reading a book in his nice house in Sheffield district of Newcastle-Upon-Tyne.  It started to get dark but he was still reading and it was getting to a very interesting part of the book.  So John got up and went to go twist the wires together to turn the light bulb on when a powerful shock almost gave him a heart attack.  So he was rushed to the hospital, he was okay this time but it was his third trip this month to the hospital due to getting shocked by twisting the wires to turn off or on a light bulb.  He was getting tired of it.  So that night he went through a bunch of designs to create a better way to turn a light bulb on and off.  It took him two months to perfect it but he finally invented the first light switch.  He created the "quick-break" switch which is actually still used in almost every ordinary light switch in the world today.