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DaVinci's Scuba Gear

A presentation about DaVinci's invention of scuba gear, how it worked, the design, and how it has progresssed throughout the days.
by

Amanda Hudgins

on 6 September 2012

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Transcript of DaVinci's Scuba Gear

:) By: Adrian and Amanda DaVinci's Scuba Gear It All Starts With An Idea In the 1500s, DaVinci
designed scuba gear. He wanted them to be used for sneak attacks on enemy ships from underwater... Attached to the mask around the nose area were two cane tubes that led up to a cork bell floating on the surface. The leather diving suit was
equipped with a bag-like
mask that went over
the diver's head. Looks a little different than we're used to, huh? So how exactly has scuba diving
gear changed since DaVinci? 1650 Von Guericke develops the first effective air pump.
1690 Edmund Halley patents a diving bell which is connected by a pipe to weighted barrels of air that can be replenished from the surface.
1715 Englishman John Lethbridge builds a "diving engine," an underwater oak cylinder that is surface-supplied with compressed air. Inside this device a diver can stay submerged for 30 minutes at 60 ft, while protruding his arms into the water for salvage work. Water is kept out of the suit by means of greased leather cuffs, which seal around the operator's arms. Halley's diving bell, late 17th century. Weighted barrels of air replenished the bell's atmosphere. (U.S. Navy Diving Manual)
1788 American John Smeaton refines diving bell; incorporates an efficient hand-operated pump to supply fresh compressed air and a non-return valve to keep air from going back up the hose when pumping stops.
1823 Charles Anthony Deane, an English inventor, patents a "smoke helmet" for fighting fires. At some point in the next few years it is used for diving as well. The helmet fits over a man's head and is held on with weights; air is supplied from the surface through a hose. In 1828 Charles and his brother John Deane market the helmet with a "diving suit." The suit is not attached to the helmet but only secured with straps; thus the diver cannot bend over without risking drowning.
1825 "First workable, full-time SCUBA" is invented by an Englishman, William James. It incorporates a cylindrical belt around the diver's trunk that serves as an air reservoir, at 450 psi.
1837 German-born inventor Augustus Siebe, living in England, seals the Deane brothers' diving helmet (see 1823) to a watertight, air-containing rubber suit.
1865 Frenchmen Benoit Rouquayrol and Auguste Denayrouse patent an apparatus for underwater breathing. It consists of a horizontal steel tank of compressed air (about 250-350 psi) on a diver's back, connected through a valve arrangement to a mouthpiece
1876 An English merchant seaman, Henry A. Fleuss, develops the first workable, self-contained diving rig that uses compressed oxygen (rather than compressed air).
1920s Research is begun in United States into the use of helium-oxygen mixtures for deep dives.
1930s Guy Gilpatric, an American ex-aviator living in southern France, pioneers use of rubber goggles with glass lenses for skin diving. By the mid-1930s, face masks, fins, and snorkels are in common use. Fins are patented by a Frenchman, Louis de Corlieu, in 1933 (called "Swimming Propellers") and later popularized worldwide by an American entrepreneur, Owen Churchill.
1933 French navy captain Yves Le Prieur modifies the Rouquayrol-Denayrouse invention by combining a specially designed demand valve with a high pressure air tank (1500 psi) to give the diver complete freedom from restricting hoses and lines.
1942-43 Jacques-Yves Cousteau (a French naval lieutenant) and Emile Gagnan (an engineer for Air Liquide, a Parisian natural gas company) work together to redesign a car regulator that will automatically provide compressed air to a diver on his slightest intake of breath.
1983 The first commercially available dive computer, the Orca Edge, is introduced. In the next decade many manufacturers market dive computers, and they become common equipment among recreational divers. In other words.... It looks like this now. ... but a few other inventors succeeded (though many failed) at adding to DaVinci's invention. There are no reports of tests that DaVinci preformed on his scuba gear. Scuba gear has been useful with attacks on ships and submarines, research, and just for recreational use throughout the years. so... thanks DaVinci!
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