Made in 1943 for the U.S. Navy, DAMAGE CONTROL IV shows the use of the Rescue Breathing Apparatus during firefighting operations aboard ships. Shown is the Navy Oxygen Breathing Rescue Apparatus, Type A-1, a self-contained, closed-circuit device. Oxygen, generated by chemicals in a canister, flowed to the right-hand section of the breathing bag, where it mixed with air previously passed through the canister, then to the left-hand breathing bag and on through the inhalation tube into the lungs. This process allowed the wearer to be independent of the surrounding atmosphere for the effective time limit of the oxygen supply, approximately 45 minutes.

You can see more of this equipment at this site:

http://www.damagecontrolmuseums.org/dcequip/breath/OBA_A1/typea1-n.html

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This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD and 2k. For more information visit http://www.PeriscopeFilm.com