The Hilfsatmer 186 and 220 (Neurode)
The Hilfsatmer model 186 (1942) and model 220(B) (1945)are back-worn oxygen rebreather of the pendulum principle.
The Dräger Hilfsatmer (Supporting breathing device) was approved for underground operation in the Ruben mine by the Breslau Mining Authority in a letter dated 2 June 1942 to the Neuroder Kohlen- und Thonwerke in Neurode (Eule). The letter to the Drägerwerk is printed in the Drägerliste R 25 of January 1946.
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!