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The Lambertsen Amphibious Respiratory Unit (LARU) is an early model of closed circuit oxygen rebreather used by military frogmen. Christian J. Lambertsen designed a series of them in the US in 1940 (patent filing date: 16 Dec 1940) and in 1944 (issue date: 2 May 1944). [1]
US Navy Emergency Escape Breathing Device (EEBD) Russian submarine-escape suit including an escape rebreather.. Escape breathing apparatus are a class of self contained atmosphere supplying or air purifying breathing apparatus for use in emergencies, intended to allow the user to pass through areas without a breathable atmosphere to a place of relative safety where the ambient air is safe to ...
One of the trunk ascents was made without a Momsen lung. [11] Many were unable to leave the trunk or discouraged from attempting an escape. [12] Most of the crew perished. The Momsen lung was replaced by the Steinke hood beginning in 1962. German submarines had such a escape breathing apparatus as standard equipment since 1912. [13]
The Aqua-Lung was not the first self contained underwater breathing apparatus, but it was the first to be widely popular. In 1934, René Commeinhes developed a firefighter's breathing apparatus which was adapted for diving as the G.C. - 42, and patented in April, 1942 (no.976,590) by his son Georges in 1937. It was used by the French Navy ...
Davis breathing apparatus tested at the submarine escape test tank at HMS Dolphin, Gosport, 14 December 1942. The DSEA rig chiefly addressed the problem of anoxia threatening a person ascending through water, by providing oxygen; and the associated risk of lung over-pressure injury as underwater pressure reduces with reducing depth, which it addressed by managing oxygen pressures.
A breathing mask, also called a facepiece, is a component which covers the mouth and nose, sometimes also the eyes and other parts of the face, and may seal against the face. A breathing mask is usually effective, allows mouth and nose breathing, and can usually be sealed adequately without effort by the user.
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 ...
Purging is the replacement of the original gas content by fresh gas, and may have to be repeated to completely remove inert gas. Purging should be done while breathing off the unit so that the inert gas in the user's lungs and body tissues that finds its way into the loop is also removed from the system.