<p>The hybrid gas generator has a chamber (10) with a frangible membrane (22) to close it. A pyrotechnic charge (12) destroys the membrane when fired. A nozzle between the charge and membrane has a through opening (40,40') to direct the charge combustion products onto the membrane. The opening is shaped and the membrane arranged so that during destruction of the membrane the central sections are removed while the peripheral sections (46,5) remain connected.</p>
