1920’s Inventions1920’s InventionsStudent SlidesStudent Slides

It was used for showing the heart beats It was used for showing the heart beats and breathing to learn if the person was and breathing to learn if the person was lying or not.lying or not.

If a person was sweating or breathing If a person was sweating or breathing heavly then a alarm will go off and the heavly then a alarm will go off and the person was lying.person was lying.

Took place in the University of California.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 Prior to the 20’s woman dried their hair by inserting a hose in the exhaust of a inserting a hose in the exhaust of a vacuum cleaner and blowing vacuum cleaner and blowing themselves dry.themselves dry.

devise was extremely large and devise was extremely large and overheated easily, it was better overheated easily, it was better than a vacuum! than a vacuum!

The hand held hair dryer was The hand held hair dryer was not invented until 1951.not invented until 1951.

Traffic LightsTraffic Lights

In October and December of 1920, a In October and December of 1920, a Detroit policeman named William Detroit policeman named William

Potts constructed several red-Potts constructed several red-yellow-green light signal systemsyellow-green light signal systems

Band-AidsBand-Aids At that time a bandage consisted of At that time a bandage consisted of

separate gauze and adhesive tape separate gauze and adhesive tape that you would cut to size and apply that you would cut to size and apply yourself.yourself.

Earle Dickson decided to invent Earle Dickson decided to invent something that would stay in place something that would stay in place and protect small wounds better.and protect small wounds better.

Earle Dickson took a piece of gauze Earle Dickson took a piece of gauze and attached it to the center of a and attached it to the center of a piece of tape, and then covered the piece of tape, and then covered the product with crinoline to keep it product with crinoline to keep it sterile.sterile.

Kool-aidKool-aid

Kool-Aid was invented Kool-Aid was invented by Edwin Perkins in by Edwin Perkins in Hastings, Nebraska, Hastings, Nebraska,

United StatesUnited States Kool-aid is usually sold Kool-aid is usually sold

in powder form, in either in powder form, in either packets or small tubspackets or small tubs

The drink is prepared by The drink is prepared by mixing the powder with mixing the powder with

sugar and water sugar and water OH, YEAAHH!!OH, YEAAHH!!

1908 - 1927 - Model T 1908 - 1927 - Model T automobileautomobile Invented by Henry FordInvented by Henry Ford

A car that was affordable to buyA car that was affordable to buy powered by steampowered by steam

Made by Made by Ford Motor CompanyFord Motor Company

Traffic SignalsTraffic Signals

Garrett A. MorganGarrett A. Morgan invented the first traffic signal invented the first traffic signal

and in 1923and in 1923 to allow pedestrians to cross to allow pedestrians to cross

streets more safelystreets more safely