Abstract: An acceleration detecting device is provided with a mass body 1 having a through hole 1a and a sliding shaft 2 passing through the through hole 1a and sliding the mass body 1 and is constituted such that the sliding shaft 2 comes in contact with the through hole 1a at two points 3a and 3b to support the mass body 1. When the through hole 1a is circular in cross section, the cross section of the sliding shaft 2 is formed in the shape of an ellipse elongated in the lateral direction or in the shape of an oblong circle elongated in the lateral direction.

Abstract: The setting of a sensitivity of an acceleration detection device is performed by regulating the characteristics of a compression coil spring such as an initial load or a spring constant of the compression coil spring and by regulating the dimension of a mass body in an axial direction of a slide shaft. Further, a compression coil spring is used which has non-linear deflection-load characteristics.

Abstract: An apparatus for switching the value of a spring constant K used in a spring mass model (54, 56, 60, 70, 76) for modeling a vehicle occupant in an occupant restraint system (20) includes a sensor (22) for sensing a crash event and providing a crash signal (40) indicative thereof. The spring mass model adjusts the acceleration signal and determines a virtual velocity value (72) and a virtual displacement value (78). The spring value K of the spring mass model is controlled in response to the determined virtual velocity value and the determined virtual displacement value relative to associated switching quadrants defined by predetermined velocity and displacement thresholds.

Abstract: Disclosed is an automotive power supply system for preventing uncontrolled acceleration that includes a battery, an ignition switch electrically connected to the battery, and an acceleration responses switch provided between the battery and the ignition switch.

Abstract: The setting of a sensitivity of an acceleration detection device is performed by regulating the characteristics of a compression coil spring such as an initial load or a spring constant of the compression coil spring and by regulating the dimension of a mass body in an axial direction of a slide shaft. Further, a compression coil spring is used which has non-linear deflection-load characteristics.

Abstract: A reed switch based shock sensor provides for passing electrical current through the coil spring used to bias the shock sensing magnetic mass. The spring is wrapped around the reed switch, allowing the coil spring to act as an electrical coil. The coil generates a magnetic field of sufficient strength to cause the reed switch reeds to attract and so close the reed switch, thus allowing the reed switch to be tested without the addition of a test coil.

Abstract: A shock sensor has a shock sensing magnetic mass that rides on the inside of a glass tube that is sealed about a reed switch. The reed switch has a first stop positioned so that the shock sensing magnetic mass when resting against the first stop does not cause the reeds of the reed switch to attract. A spring extends between the shock sensing magnetic mass and a second stop. Acceleration causes the sensing mass to accelerate toward the second stop. The motion of the magnetic sensing mass causes the switch reeds to attract and close the reed switch. The entire shock sensing mechanism is hermetically sealed within the glass capsule of the reed switch. The reed switch within the glass capsule detects movement of the shock sensing mass.

Abstract: A dynamic displacement sensor for detecting an out-of-fluid condition in a liquid delivery system detects an increased amplitude of pump motion of a reciprocating air pump and provides an output signal upon detecting the increased amplitude motion. The detector includes a spring-mass combination supported within a housing such that the mass is movable along a defined axis of the housing, with the spring applying a restoring force to the mass when the mass moves away from its static position. The detector is attached to the pump with its defined axis aligned parallel with the pump axis. A sensor within the housing is triggered to change state when the mass is displaced by pump motion of a predetermined amplitude and frequency, thereby providing an output signal indicating an out-of-fluid condition.

Abstract: A micromechanical acceleration switch of silicon or similar materials, comprising a resilient electrode element, a proof mass, a housing and a spring element connecting the electrode element and the proof mass to the housing. The electrode element is mechanically connected adjacent to the proof mass. The proof mass has its centre of gravity located at a given distance from the axis through the spring element, so that when the proof mass is pivoting about the axis of the spring element in response to an externally applied acceleration, with a component in a direction parallel with the first axis. The electrode element also pivots about this axis. The pivot angle being essentially proportional to the magnitude of this component of the acceleration.