When Thomas Edison and his team were working on lightbulbs. Edison was doing work and was using kerosene for an experiment. He was unscrewing the top of the kerosene can and someone mentioned that would be a great thing to use to put a light bulb into a electrical socket. So it was tried. You will see the result here. The first type of screw in light bulb with the drawing behind it. I like to think of it as the KISS method. If you look at the base of the first type of screw in light bulb...you can see the base is the same size as the spout of the kerosene can!
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