公开(公告)号：US3613944A

公开(公告)日：1971-10-19

申请号：US3613944D

申请日：1969-12-05

Applicant: GEN MOTORS CORP

Inventor： ZEIGLER PHILIP B ,  AMAND JAMES C ST ,  RANFT ERNST L

IPC: B60R21/16 ,  B60R21/33 ,  G01P15/135 ,  B67B7/24

CPC classification number: B60R21/33 ,  G01P15/135

Abstract: A sensor and trigger mechanism includes a ball of predetermined weight held against a pedestal-type seat by an adjustable screw. A sealed pressure vessel is biased axially toward a hollow penetrator pin and normally located in spaced relationship to the penetrator pin by a hollow frangible glass cylinder having a compressively stressed continuous outer surface skin or layer. A fragmentor pin is movably positioned to engage an outer edge of the glass cylinder to fragmentize the glass cylinder into segments and permit the seal of the vessel to be ruptured or penetrated by the penetrator pin so that the supply of pressure fluid within the cylinder can escape through the penetrator pin and into a manifold to inflate a restraint cushion. A spring member includes a first arm for engaging the fragmentor pin and a second arm which includes an integral detent portion for holding the first arm out of engagement with the fragmentor pin. The detent portion of the second arm is held in engagement with the first arm when the ball is seated. Upon application of a predetermined rate of acceleration change to the ball over a predetermined time duration, the ball slides off the seat and from underneath the adjustable screw to release the second arm and in turn release the first arm to engage the fragmentor pin and drive the pin into engagement with an outer edge of the cylinder to fragmentize the cylinder.