Both systems had the same objective, but implementation - namely to generate extremely short inflating times in a closed vehicle using highly compressed air - was an insurmountable obstacle. They were unfortunately unsuccessful. A few other inventors tried the idea but failed due to insufficient functional reliability. In the end pyrotechnics were required to achieve the extremely short inflating time required for the airbag.
The actual development of the current pyrotechnic gas generators, which allow for a response time of less than 30 milliseconds, was developed 20 years later in southern Germany. Meanwhile, the export of German passenger cars to the USA had become an important economic factor. The German automotive industry also endeavored to find a solution because of the prescribed law, which made inflatable occupant safety systems mandatory for new cars in the USA as of January 1, 1973. From a military project at Bayern Chemie (its Aschau am Inn plant belongs to ZF Group since 2015), the task was to "transmit small scatter bombs from the aircraft by means of a propellant charge in such a way that the sound pressure generated during the emission does not cause any damage to the aircraft," and a gas generator was the principle way to achieve this. The solid fuel initially consisted of sodium azide, potassium nitrate and sand and was pressed in tablet form. It exclusively produces the non-toxic gas nitrogen and potassium oxide as solids when ignited.