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Aqua-Lung [1] was the first open-circuit, self-contained underwater breathing apparatus (or "scuba") to achieve worldwide popularity and commercial success. This class of equipment is now commonly referred to as a twin-hose diving regulator , [ 2 ] or demand valve .
The Momsen lung was a primitive underwater rebreather used before and during World War II by American submariners as emergency escape gear. It was invented by Charles Momsen, who worked on it from 1929 to 1932. [1] Submariners trained with this apparatus in an 80 ft (24 m) deep Escape Training Tank at New London, Mare Island, [2] or Pearl Harbor.
Underwater breathing apparatus can be classified as open circuit, semi-closed circuit, (including gas extenders) or closed circuit (including reclaim systems), based on whether any of the exhaled gas is recycled, and as self-contained or remotely supplied (usually surface-supplied, but also possibly from a lock-out submersible or an underwater habitat), depending on where the source of the ...
In Britain the word "aqualung" became a generic trademark for open-circuit underwater breathing sets and remained so for many years. The word "scuba" became the generic word quickly in the US and eventually in Britain. For more information see Aqua-lung#Trademark issues. From 1946 to 1955 La Spirotechnique sold only one model of regulator, the ...
Elastomeric masks linked to backpack air tanks: self-contained breathing apparatus, worn by firefighters advancing with a firehose. There are two major application areas for SCBA: firefighting, and industrial use in confined spaces. [20] For SCBAs used in firefighting, manufacturers typically prioritize fire resistance and weight reduction over ...
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