If you've ever been flummoxed by a revolving door—who goes in first? Do we go together, or one at a time? How do you keep your rolling suitcase from getting caught?—you have one person to thank: a man by the name of Theophilus van Kannel. Legend has it he invented the device to keep from having to hold open doors for women. His goal seems to have backfired, but his innovation still offers important benefits to this day.
After You? No, After Me
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Key Facts In This Video
Theophilus Kannel invented the revolving door to avoid having to hold doors for women. 00:06
Theophilus Kannel patented his revolving door design in 1888. 00:32
Revolving doors are more energy efficient than traditional doors, and keep outside odors and noise from entering a building. 00:55
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