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Meet Mary Beatrice Davidson Kenner, Self-taught Inventor Who Revolutionized Menstrual Pads
Mary Beatrice Davidson Kenner (1912–2006) always had trouble sleeping when she was growing up in Charlotte, North Carolina. Her mother would leave for work in the morning through the squeaky door at the back of their house and the noise would wake Kenner up. “So I said one day, ‘Mom, don’t you think someone could invent a self-oiling door hinge?’” She was only six at the time, but she set about the task with all the seriousness of a born inventor. “I [hurt] my hands trying to make something that, in my mind, would be good for the door,” she said. “After that I dropped it, but never forgot it.”
You could say that skill and ingenuity was in Kenner’s blood. Her maternal grandfather had invented a tricolor light signal…