20s and 30s Inventions

  • Lie Detector (Polygraph)

    Lie Detector (Polygraph)
    Lie DetectorThe Lie Detector was invented by John A, Larson. Larson was a medical student when he invented the Lie Detector. The Lie Detector would measure heartbeats and breathing. Later it monitored the skin system to tell if the person was sweating, their pulse became higher, and the alarm would buzz, meaning the person was lying.
  • Insulin - Diabetes

    Insulin - Diabetes
    InuslinDr. Frederick Banting was an unknown surgeon in Toronto, Canada. He was the one who had came up with "Insulin". Banting had experimented on dogs! Bantings had won a nobel prize in Physiology of Medicine.
  • Traffic Light

    Traffic Light
    Garrett A. Morgan was the inventor of the Traffic Light. Video of the 1920s inventions mentions many inventions of the 1920s and their inventors. http://www.history.com/videos/1920s-inventions
  • Monitor Top Refrigerator

    Monitor Top Refrigerator
    Monitor Top RefrigeratorThe Monitor Top Rerfrigerator was designed by Christian Steensturp in 1927. They say it was the cheapest refrigerator, $525. It was GE's most successful product. it had one door and a steel refrigerator cabinet.
  • Baby Food

    Baby Food
    Baby food was created by Dorothy Gerber. She used strained and pureed food to give to her 7-month old daughter. Dorothy's husband Dan took the food to his dad's comapny, call the Fremont Canning Co., to further experiment. Within a year Gerber Baby Food was born.
  • Penicillin

    PenicillinPenicillin was discovered by Sir Alexander Fleming. Fleming noticed that colonies of the bacterium Staphylococcus aureus can be destroyed by the mold Penicillium notatum. He then proved that there was an antibacterial agent present.
  • The Jet Engine - "Turbojet Engine"

    The Jet Engine - "Turbojet Engine"
    Turbojet EngineSir Frank Whittle was the one to make the jet engine. His design seemed to have solved the problem that had baffled inventors. The Turbojet Engine had 10 combustion chambers which had produced much thrust.
  • Scotch Tape

    Scotch Tape
    Scotch tape was invented by Richard Drew. It was the world's first transparent adhesive tape.
  • Electric Razors

    Electric Razors
    Jacob Schick was the inventor of the Electric Razor. He sold his first electric razor for $25 in New York. By 1937 1.5 million electric razors were sold, Schick made $20 million.
  • GPS - Rolling Key Map

    GPS - Rolling Key Map
    GPSDr. Ivan Getting invented the GPS. The device includes many paper maps that may be changed according to your trip. The map supposedly progresses to the car's speed.