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1920’s Inventions

1920’s Inventions. Student Slides. Lie Detector- John A. Larson. It was used for showing the heart beats and breathing to learn if the person was lying or not. If a person was sweating or breathing heavly then a alarm will go off and the person was lying.

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1920’s Inventions

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  1. 1920’s Inventions Student Slides

  2. Lie Detector- John A. Larson It was used for showing the heart beats and breathing to learn if the person was lying or not. If a person was sweating or breathing heavly then a alarm will go off and the person was lying. Took place in the University of California.

  3. Thompson Submachine Gun The Thompson (Tommy Gun) is a high powered machine gun that was used by American troops, it was was manufactured in Birmingham Small Arms

  4. Hair Dryer Prior to the 20’s woman dried their hair by inserting a hose in the exhaust of a vacuum cleaner and blowing themselves dry. devise was extremely large and overheated easily, it was better than a vacuum! The hand held hair dryer was not invented until 1951.

  5. Traffic Lights In October and December of 1920, a Detroit policeman named William Potts constructed several red-yellow-green light signal systems

  6. Band-Aids At that time a bandage consisted of separate gauze and adhesive tape that you would cut to size and apply yourself. Earle Dickson decided to invent something that would stay in place and protect small wounds better. Earle Dickson took a piece of gauze and attached it to the center of a piece of tape, and then covered the product with crinoline to keep it sterile.

  7. Kool-aid Kool-Aid was invented by Edwin Perkins in Hastings, Nebraska, United States Kool-aid is usually sold in powder form, in either packets or small tubs The drink is prepared by mixing the powder with sugar and water OH, YEAAHH!!

  8. 1908 - 1927 - Model T automobile Invented by Henry Ford A car that was affordable to buy powered by steam Made by Ford Motor Company

  9. Traffic Signals Garrett A. Morgan invented the first traffic signal and in 1923 to allow pedestrians to cross streets more safely

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