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Aqualung

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Invented by: Jacques Cousteau and Emil Gagnan
Nationality: French
Date: 1943
Purpose: to supply air to free-swimming underwater swimmer, at the same pressure as the surrounding sea.
 
    Jacques Cousteau told Gagnan exactly what he wanted. Emil Gagnan made it. With unregulated compressed air supplies, and with sea pressure increasing with depth, there was always a dan­ger of an underwater swimmer's lung collapsing.
      The aqualung has a special valve regulating the air supply.
As the diver breathes out, the pressure of his breath opens an  outlet valve which also shuts off the air supply. As he breathes in, the internal pressure falls and the outside water pressure closes the outlet valve and switches the compressed air supply back on. The air flows in until the pressure in the valve is the same as the pressure of the outside water. Then it cuts off.

   


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Slobodskoy 


Mikhail
Lomonosov

Albert Einstein 

Alexander Fleming

Igor Kurchatov

Poytr Lebedev

Marie Curie

Michael Faraday

Wilhelm Roentgen


  Electric Light Bulb
 
Tape Recorder
(and Walkman)

Television

 
Telephone

Cameras  in the Beginning

Aqualung

 
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