초록 ▼

A velocity change sensor adapted for mounting on a vehicle equipped with a passenger protective device, such as an inflatable air bag, comprises a body fitted with a normally open electrical switch connected to the passenger protective device\s operating mechanism and adapted to be closed by a sensi

A velocity change sensor adapted for mounting on a vehicle equipped with a passenger protective device, such as an inflatable air bag, comprises a body fitted with a normally open electrical switch connected to the passenger protective device\s operating mechanism and adapted to be closed by a sensing mass upon movement of such sensing mass a predetermined distance in response to acceleration of the vehicle above a predetermined threshold. The sensing mass is biased to a normally inactive, initial position under a force which establishes the acceleration threshold. A biasing mass engages the sensing mass when the latter is in its initial position but moves out of engagement with the sensing mass in response to acceleration of the vehicle above the threshold level to permit movement of the sensing mass from its initial position toward its passenger protective device operating position. Movement of the biasing mass is damped to prevent rebounding of the biasing mass and consequent interference with movement of the sensing mass. Movement of the sensing mass also is damped to prevent operation of the passenger protective device except in those instances in which the acceleration and duration thereof are of such magnitude as to require operation of the protective device.

대표청구항 ▼

In a sensor construction adapted for mounting on a vehicle or the like having an instrumentality to be operated in response to acceleration of said vehicle above a predetermined threshold, said sensor having a body member provided with a tubular passage having a bore within which a sensing mass is m

In a sensor construction adapted for mounting on a vehicle or the like having an instrumentality to be operated in response to acceleration of said vehicle above a predetermined threshold, said sensor having a body member provided with a tubular passage having a bore within which a sensing mass is mounted for movement in response to acceleration of said vehicle from an initial position toward a second position in which said sensing mass initiates operation of said instrumentality, and biasing means exerting a predetermined, yieldable force on said sensing mass restraining movement of the latter from said initial position until said predetermined force is overcome by acceleration whereupon said biasing means is movable relative to said body member and said sensing mass, the improvement comprising means responsive to and following movement of said biasing means a predetermined distance relative to said sensing mass for damping further movement.