Rebreather with superoxide cartridge for oxygen generation
The MSA oxygen breathing apparatus modell B photpgraphs and text by Jan Willem Bech first published 20-01-2010
The MSA oxygen rebreathing apparatus model B is a oxygen rebreather equipped with chemical superoxide canister. The canister both scrubs the CO2 and produces the necessary oxygen. This half hour unit was mainly used in the US marines. The particular unit was build in WWII possible in 1945.
This rebreather comes without oxygencylinder since oxygen is generated in the scrubber!
The scrubber contains a very reactive substance capable of scrubbing CO2 and generating oxygen is the same time.
The mask has a Oral membrane, allowing the wearer to communicate while unit is applied
Wanted: Please send a copy of the manual N5ss
The extremely heavy build mechanism to hold the chemical cartridge
When lever is opened the scrubber pops out.
The scubber is marked 1945, this is probably the latest shelfdate (use date)
The 30 minutes oxygen generating and carbondioxide scrubbing cartridge. This type of oxygen candles generate enormous heat through the chemical process. For this reason, the cartridges are isolated from the user’s body as much as possible.
The angled side of the connection fits perfectly in de holder
The black push mechanism is spring loaded and holds the cannister in place
This tube has a one way valve to force the gas in one direction
The unit can be disassembled with the aid of this one tool
Connections sealed with rubber flat seals
The valve is directionally one way valve made of mica
The mushroom valve can be closed with the springlock mechanism
The inside of the mouth/nose mask is covered with leather
Antifog paste
Antifog paste for the use with the goggles
Mask pocket
This fire resistant pocket was designed to put the mask in? Material might contain asbestos…..
UNIT COMES WITH GOGGLES MADE BY THE OLYMPIC COMPANY!
Strap and mask made in one piece 😉
Therebreathersite was founded by Jan Willem Bech in 1999. After a diving career of many years, he decided to start technical diving in 1999. He immediately noticed that at that time there was almost no website that contained the history of closed breathing systems. The start for the website led to a huge collection that offered about 1,300 pages of information until 2019. In 2019, a fresh start was made with the website now freely available online for everyone. Therebreathersite is a source of information for divers, researchers, technicians and students. I hope you enjoy browsing the content!
