HERMETISKT FOERSEGLAD SENSOR FOER LUFTKUDDEUPPBLAASNING

摘要

A sensor for initiating air bag inflation during automobile crashes includes a hermetically sealed container 2 containing a fluid for controlling the movement of an inertia mass 6. If the crash is of sufficient severity and duration, the inertia mass 6 moves to close a pair of contacts 14 and 15 and thus cause air bag inflation. The hermetic sealing leaves the operating characteristics of the sensor unchanged despite changes in ambient atmospheric pressure. The fluid may be air or other gases such as helium of helium mixed with air to achieve a desirable operating characteristic.