Earthquake activated valve

A shut-off valve comprising:

• a valve housing, having inlet and outlet apertures communicating with a central valve chamber;
• a valve seat provided between the inlet aperture and the outlet aperture;
• a magnet, located in the inlet aperture, that covers the circumference of the inlet of the valve body, having an opening to allow flow through the inlet;
• a ball check, having metallic properties so that the ball check is attracted to the magnet, having a diameter relative to the size of the magnet so that the ball may provide a seal when attached to the magnet that prevents the flow of gas;
• a ball sleeve, which is snugly fitted into the central valve chamber, having an inlet opening and an outlet opening that do not restrict the flow of gas;
• a ball guide ramp, located on the bottom of the ball sleeve, and having a concave shape to guide the ball down to the magnet;
• a ball travel cradle to support the ball check rolling down the ball guide ramp by gravity alone, yet allows the ball to be displaced from the ball travel cradle due to agitation;
• a ball reset pull tab;
• a level rest formed on the valve housing, which provides a means for installing the valve body so that the ball guide ramp will be positioned so that if the ball check is displaced from the ball travel cradle, gravity will cause the ball check to traverse the ramp toward the magnet;
• an access bonnet removably secured to the central valve chamber;
• and
• a cover washer, located between the valve body and the access bonnet.