Abstract: A gas mask and breathing equipment with a respirator, to the respiration gas inlet of which a respiration gas filter and a respiration supporting blower unit are connected, is formed such that the components controlling the power output are arranged in areas that are favorable for operation and are able to control the blower unit in the case of a filter change or during changes in the state of loading of the built-in filters during operation such that they can be adapted to the changing performance characteristics. The housing of the blower unit (2) has a saddle-shaped upper part (5), over which a control unit (7), designed as an independent housing module, can be attached in a bow-like manner, and establishes the electrical and pneumatic connections to the blower unit.

Abstract: An oxygen respirator, comprises a portable container having a cartridge chamber with a cylindrical oxygen-supplying chemical cartridge centrally located in the chamber and with a replaceable CO.sub.2 -absorbing cartridge concentrically surrounding the chemical cartridge. The cartridge chamber is closed by a baseplate which includes a mouthpiece connection defining a mouthpiece passage for respirator air for the user which connects downwardly into the chamber through an associated check valve for flow downwardly through the annular CO.sub.2 -absorbing cartridge and upwardly through the oxygen-supplying chemical cartridge which, after initial ignition, supplies oxygen to the respiratory air which is circulated back to the mouthpiece passage either directly or through a breathing bag which is mounted in the respiratory air breathing passages.