Abstract: A vibration sensitive safety valve for gaseous fluids using a sphere of ferrous material as a valve plug, the ball being held in a sensitive condition, suspended above a complementary valve seat, by a permanent magnet. The magnetic attraction is such that a significant tremor will dislodge the ball, allowing it to drop and plug the valve passage. A flat non-magnetic spacer disc on the bottom of the magnet allows some lateral movement of the valve ball in response to harmless vibrations, without releasing the ball to close off the valve. A moveable mass within the ball absorbs the effect of minor vibrations.

Abstract: A vibration and flow sensitve safety valve for gaseous fluids using a sphere of ferrous material as a valve plug, the ball being held in a sensitive, suspended condition positioned above its valve seat, by a permanent magnet. The magnetic attraction is such that a significant tremor or a significant pressure drop below the ball resulting from excessive flow through the venturi gap between the ball and its valve seat will dislodge the ball, allowing it to drop and plug the valve passage.