Breathing Apparatus Rescue And Protective
Breathing Apparatus Rescue And Protective
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OPERATION OF APPARATUS.
As the wearer of -the apparatus exhales, the air from his lungs passes into the breathing chamber through the mouth- piece, thence through the absorption cartridge, which absorbs the CO2 and allows the un combined oxygen (and nitrogen if there is any left) to pass into the breathing bag. The absorp- tion of oxygen by the body causes a decrease in volume of the air in the breathing bag which, in flattening out, allows a weight to come in contact with and operate the autom...atic oxygen-inlet valve which supplies fresh oxygen to the bag.
Those unfamiliar with the necessity for the obviously un- comfortable tight-fitting mouthpiece and nose clip frequently BREATHING APPARATUS. 21 suggest that these features be eliminated by the providing of a mask face piece or helmet covering the entire head into which the wearer would breathe through his nose, leaving the mouth free for conversation. It is, therefore, stated for general infor- mation that extensive experiments carried on by the Bureau of Mines prove conclusively that to provide a mask or helmet would be a most dangerous procedure for the following prin- cipal reasons : (a) One of the most serious defects which may be encountered in such apparatus is leakage of irrespirable gases into the sys- tem either through breaks in the material or around the edges of the face piece or helmet.
What to read after Breathing Apparatus Rescue And Protective?
You can find similar books in the "Read Also" column, or choose other free books by United States Navy Dept Bureau of Construction a to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
OPERATION OF APPARATUS.
As the wearer of -the apparatus exhales, the air from his lungs passes into the breathing chamber through the mouth- piece, thence through the absorption cartridge, which absorbs the CO2 and allows the un combined oxygen (and nitrogen if there is any left) to pass into the breathing bag. The absorp- tion of oxygen by the body causes a decrease in volume of the air in the breathing bag which, in flattening out, allows a weight to come in contact with and operate the autom...atic oxygen-inlet valve which supplies fresh oxygen to the bag.
Those unfamiliar with the necessity for the obviously un- comfortable tight-fitting mouthpiece and nose clip frequently BREATHING APPARATUS. 21 suggest that these features be eliminated by the providing of a mask face piece or helmet covering the entire head into which the wearer would breathe through his nose, leaving the mouth free for conversation. It is, therefore, stated for general infor- mation that extensive experiments carried on by the Bureau of Mines prove conclusively that to provide a mask or helmet would be a most dangerous procedure for the following prin- cipal reasons : (a) One of the most serious defects which may be encountered in such apparatus is leakage of irrespirable gases into the sys- tem either through breaks in the material or around the edges of the face piece or helmet.
What to read after Breathing Apparatus Rescue And Protective?
You can find similar books in the "Read Also" column, or choose other free books by United States Navy Dept Bureau of Construction a to read onlineMoreLess
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