Science in the 1920s

Science and Technology from the 1920's to 1929

  • Hair Dryer

    Hair Dryer
    The hair dryer was invented in Germany by a woman who put a hose in a vaccum cleaner.
  • Band-Aid

    Invented by Earle Dickinson. He created this because his wife was always cutting her fingers in the kitchen.
  • 3-D Movie

    3-D Movie
    The first 3-D movie (spectacles with one red and one green lens) is released. The first 3-D movies used anaglyphs to produce the 3-D images.To ensure that their left and right eyes saw the appropriate images, viewers of anaglyph movies had to wear special spectacles with one red and one green (later, cyan) lens to watch the 3D films
  • Q-Tips

    Invented by Leo Gerstenzang's wife, but he put it on the market. It was originally called Baby Gays.
  • Lie Detector

    Lie Detector
    A polygraph, or lie detector, measures and records several physiological indices such as blood pressure, pulse, respiration, and skin conductivity while the subject is asked and answers a series of questions. The belief underpinning the use of the polygraph is that deceptive answers will produce physiological responses that can be differentiated from those associated with non-deceptive answers.
  • First Robot

    First Robot
    the first robot is built. A robot by definition is "an automatic device that performs functions normally ascribed to humans or a machine in the form of a human."
  • Radar (Radio Detection and Ranging)

    Radar (Radio Detection and Ranging)
    Radar is an object-detection system that uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio waves or microwaves that bounce off any object in their path.
  • Television

    The television or iconoscope (cathode-ray tube) is invented by Vladimir Kosma Zworykin.
  • Dynamic Loudspeaker

    Dynamic Loudspeaker
    The dynamic loudspeaker invented by Rice and Kellogg.
  • Mechanical Television

    Mechanical Television
    A television system that relied on a mechanical scanning device when generating or displaying the video signal. The signal itself was purely electronic and could be transmitted by radio or over a wire.
  • Liquid-Fueled Rockets

    Liquid-Fueled Rockets
    Robert H. Goddard invents liquid-fueled rockets.
  • Kool-Aid

    Kool-Aid was invented by Edwin Perkins. The original name of it was Fruit Smack..
  • Bread Slicer

    Bread Slicer
    The bread slicer was invented by Otto Frederick Rowedder.
  • Electric Razor

    Electric Razor
    The electric razor (also known as the electric dry shaver) has a rotating or oscillating blade. The electric razor usually does not require the use of shaving cream, soap, or water. The razor may be powered by a small DC motor, which is either powered by batteries or mains electricity. Many modern ones are powered using rechargeable batteries.
  • Car Radio

    Car Radio
    Car Radio includes mobile audio, car audio, 12-volt audio and other terms are used to describe sound systems fitted to an automobile or other vehicle. The primary use of such equipment is usually entertainment, but can also include communications equipment, public address, and other similar applications.