A gas generator device (10) comprises a cartridge (12) containing a pyrotechnic charge (14) and igniting means for remotely igniting the charge. The cartridge (12) is formed at opposite ends with combustion gas settling chambers (18). The chambers (18) are in gasflow communication with a combustion chamber (20) via gas outlet nozzles extending along ports (24). Escaping of gas generated by the combustion reaction for inflating inflatable equipment takes place via a plurality of discharge outlets in the form of passages (32) formed through end flanges (34) forming part of the casing (22) of the cartridge (10). The passages (32) are arranged in facing pairs facing one another alongside the side of the tube (16). This limits the generation of resultant thrust on the device (10) once in use. The igniting means includes two igniter switches (36) arranged to electrically ignite the charge (14).
