Pneumatic alarm system

摘要

A pneumatic alarm system in which a single source of gas under pressure is connected to one side of a balanced regulator valve while a plurality of rupturable sensors are connected by a manifold to the other side of the balanced regulator valve which is maintained in an inactive state when the manifold pressure and the source pressure bear a predetermined relationship to each other. When the relationship terminates by the rupture of one or more of the sensors, the valve activates and connects the pressurized single gas source to an audible warning device to cause an alarm to be sounded.