"SIGMA" APPARATUS PROVIDING HUMAN BREATHING IN EMERGENCIES Russian patent published in 1997 - IPC

FIELD: oxygen breathing equipment, in particular, devices used for oxygen supply to a human in emergencies and protection of respiratory organs and eyes for the protection of respiratory organs and eyes for the period of evacuation from emergency rooms. SUBSTANCE: the apparatus mask, having a breathing valve, communicates with the pulmonary sac communicates with the chlorate generator furnished with chlorate rods liberating oxygen at initiation the generator in the presence of cobalt. The generator rods are interconnected by reaction crosspieces and heat-insulated by coarse-grain sand, and the carbonic acid absorber is made as a coaxial cylinder with a lime absorber on the periphery and with an internal tube for passage of gaseous mixture, in which a stop valve is installed on the side of the mask and an antidust fabric filter - on the side of the pulmonary sac; the pulmonary sac on the side of the oxygen generator is furnished with a Laval nozzle with a drive in the form of a cable passing through the nozzle throat and pulmonary sac space. The device for initiation of chlorate rods may be made in the form of a tungsten heater immersed in powder of sodium, magnesium and aluminium chlorate, and a power source connected to a lantern. EFFECT: enhanced reliability. 3 cl, 1 dwg