1920’s Inventions Student Slides

 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.

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

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.

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

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.

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!!

Model T automobile  Invented by Henry Ford  A car that was affordable to buy  powered by steam  Made by Ford Motor Company Ford Motor CompanyFord Motor Company

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