VELOCITY CHANGE SENSOR WITH ADJUSTMENT SCREW

摘要

An accelerometer for activating a passenger restraint system in a motor vehicle includes a housing with a passage for defining a path of movement, and an inertial element moving in said path. Either a mechanical or a magnetic member is used to bias the inertial element toward a preset position. The preset position is defined by a presetting member which is adjustable so that the accelerometer is responsive to crashes with a tolerance of ? 1 MPH. As the inertial element moves away from the preset position in case of a crash, it closes an electrical contact for deploying the passenger restraint system