Abstract: A seismic safety apparatus has a housing having an internal space and an external surface. A seismic safety activating mechanism is provided inside the housing for activating a seismic safety device. The seismic safety activating mechanism includes an inertia ball recess located in the internal space, an inertia ball in the housing that has an unactuated position on the recess and an actuated position displaced from the unactuated position on the recess. The inertia ball recess is formed so that when the inertia ball is in the valve member recess, vibrations or seismic shocks of a predetermined magnitude cause the inertia ball to move from the unactuated position to the actuated position. An engagement component inside the housing is provided as part of the seismic safety activating mechanism at the actuated position for engagement with the inertia ball when the inertia ball is displaced from the unactuated position.

Abstract: A device that will automatically shut-off the flow of a fluid when the device senses predetermined seismic and other shock forces. The device includes a housing having an inlet and outlet in communication with the flow of fluid. An inertia ball, which moves directly or indirectly from a resting position to block the flow of fluid, is held in a closed position by the force of an external magnet. When the external magnet moves about a given path, the inertia ball moves to a resting position, thus opening the flow of fluid. The movement of the external magnet along the given path forces the inertia ball to follow the magnet, thus providing an easy way of controlling the flow of fluid without the use of mechanical seals.