History of Diving 4500 years ago the ancient Greeks, using newly developed glass, made facemasks and used them to dive for ornamental shells. HISTORY 4 min
Diving Chamber • The divingchamber was a huge barrel that contained a limited supply of air • attached to a ship, • limited movement. • weird diving suits
Diving Suit • The DivingSuit (1873)was made of watertight canvas heavy metal helmet. • Air was pumped from the surface • Limited movement, attached to the ship. • commercial diving today • JUST GROSS
“12 Steps to Honor”DIVE SCENEaccidentCourt SceneHis story (7 min)
History Jonathan bird • Dive helmet limitations • dive helmet dive
1878- Henry Fleus –invents a self contained underwater breathing unit
1943- Jacques-Yves Cousteau and Emile Gagnan design and test the first aqua-lung • his life • Scuba inventions
SCUBA SCUBA- self contained underwater breathing apparatus It allowed for greater movement and freedom underwater.
Hugh Bradner, a University of California, Berkeley physicist invented the modern wetsuit in 1952
Summary Advances in technology, especially in the past 150 years, have given people the ability to explore the ocean: • at greater depths • for longer periods of time • with more safety and mobility
The History of Diving • The History of Scuba DivingJacques Cousteau & Other Inventors • Modern scuba diving gear consists of one or more gas tanks strapped to the divers back, connected to an air hose and an invention called the demand regulator. The demand regulator controls the flow of air, so that the air pressure within the diver's lungs equals the pressure of the water. • Early Diving Gear • Ancient swimmers used cut hollow reeds to breathe air, the first rudimentary snorkel used to enhance our abilities underwater. Around 1300, Persian divers were making rudimentary eye goggles from the thinly sliced and polished shells of tortoises. By the 16th century, wooden barrels were used as primitive diving bells, and for the first time divers could travel underwater with more than one breath of air, but not much more than one.
More Than One Breath • In 1771, British engineer, John Smeaton invented the air pump. A hose was connected between the air pump and the diving barrel, allowing air to be pumped to the diver. In 1772, Frenchmen, Sieur Freminet invented a rebreathing device that recycled the exhaled air from inside of the barrel, this was the first self-contained air device. Freminet's invention was a poor one, the inventor died from lack of oxygen after being in his own device for twenty minutes.In 1825, English inventor, William James designed another self-contained breather, a cylindrical iron "belt" attached to a copper helmet. The belt held about 450 psi of air, enough for a seven-minute dive.
In 1876, Englishmen, Henry Fleuss invented a closed circuit, oxygen rebreather. His invention was originally intended to be used in the repair of an iron door of a flooded ship's chamber. Fleuss then decided to use his invention for a thirty-foot deep dive underwater. He died from the pure oxygen; oxygen is toxic to humans under pressure.
Rigid Diving Suits • In 1873, Benoît Rouquayrol and Auguste Denayrouze built a new piece of equipment a rigid diving suit with a safer air supply, however it weighed about 200 pounds.
Houdini Suit - 1921 • Famous magician and escape artist, Harry Houdini (born Ehrich Weiss in Budapest, Hungary in 1874) was also an inventor. Harry Houdini astonished audiences by escaping from handcuffs, straitjackets, and locked boxes, often doing so underwater. Houdini's invention for a diver's suit permitted divers, in case of danger, to quickly divest themselves of the suit while submerged and to safely escape and reach the surface of the water.
SCUBA Gear • Videos for PPT\How SCUBA Works.flv
Class Work • Read pages 15 (bottom)- 20. • Answer section review questions 1-3 on page 20.