Search results
Results from the WOW.Com Content Network
A long leather hose attached to the rear of the helmet was to be used to supply air, the original concept being that it would be pumped using a double bellows. A short pipe allowed breathed air to escape. The garment was to be constructed from leather or airtight cloth, secured by straps. Later, it was developed into a diving apparatus.
Standard diving dress, also known as hard-hat or copper hat equipment, deep sea diving suit or heavy gear, is a type of diving suit that was formerly used for all relatively deep underwater work that required more than breath-hold duration, which included marine salvage, civil engineering, pearl shell diving and other commercial diving work, and similar naval diving applications.
1842 sketch of the Deane brothers' diving helmet Standard diving dress with Dräger DM-40 semi-closed circuit nitrox rebreather set. In 1405, Konrad Kyeser described a diving dress made of a leather jacket and metal helmet with two glass windows. The jacket and helmet were lined by sponge to "retain the air" and a leather pipe was connected to ...
The usual meaning of diving helmet is a piece of diving equipment that encases the user's head and delivers breathing gas to the diver, but the term "diving helmet", or "cave diving helmet" may also refer to a safety helmet like a climbing helmet or caving helmet that covers the top and back of the head, but is not sealed. These may be worn ...
The timeline of underwater diving technology is a chronological list of notable events in the history of the development of underwater diving equipment.With the partial exception of breath-hold diving, the development of underwater diving capacity, scope, and popularity, has been closely linked to available technology, and the physiological constraints of the underwater environment.
The real success of the equipment was a valve in the helmet. Colonel Charles Pasley , leader of the Royal Navy team that used Siebe's suit on the wreck of HMS Royal George suggested the helmet should be detachable from the corselet , giving rise to the typical standard diving dress which revolutionised underwater civil engineering , underwater ...
[citation needed] The early diving helmets used had no non-return valves, which meant that if a hose was severed near the surface, the high-pressure air around the diver's head rapidly evacuated the helmet, causing a large pressure difference between the surrounding water and the remaining gas, with extreme and sometimes life-threatening effects.
Heinke's diving helmets had three similarly shaped circular windows. They did not have the outer protective grills as in other helmets; thus they had better visibility for divers, and it was easier to keep the windows clean. Heinke's main competitor was Siebe Gorman who also made diving helmets, and Heinke constantly tried to improve on designs ...