Pressure responsive control system

Claim 1

A CONTROL SYSTEM FOR OPERATING A PLURALITY OF PRESSURE RESPONSIVE DEVICES COMPRISING: (A) FIRST AND SECOND PILOT VALVES EACH INCLUDING A CAS ING CONTAINING A CYLINDRICAL VALVE CHAMBER HAVING A CYLINDRICAL WALL, A PORT THROUGH THE CYLINDRICAL WALL OF THE CASING, A FLUID VENT PASSAGEWAY THROUGH THE CASING COMMUNICATING WITH THE CYLINDRICAL VALVE CHAMBER, A ROTOR IN THE VALVE CHAMBER WITH ITS AXIS OF ROTATION CONICIDING WITH THE AXIS OF THE VALVE CHAMBER, THE ROTOR INCLUDING A PROJECTION EXTENDING RADIALLY FROM SAID ROTOR CIRCUMFERENTIALLY ALIGNED WITH THE PORT, AND CONTACTING THE CYLINDRICAL WALL OF THE CASING AT THE PORT, A FLUID PRESSURE PASSAGEWAY THROUGH THE ROTOR COMMUNICATING BETWEEN THE EXTERIOR THE PILOT VALVE AND THE PROJECTION AND FORMING AN ORIFICE IN THE PROJECTION WHEREBY WHEN FLUID PRESSURE IS IN THE FLUID PRESSURE PASSAGEWAY AND THE PROJECTION IS OVER THE PORT, FLUID PRESSURE MAY FLOW THROUGH THE PILOT VALVE, (B) A FIRST PRESSURE RESPONSIVE ACTUATOR ASSOCIATED WITH THE FIRST PILOT VALVE FOR MOVING ITS ROTOR A PORTION OF A REVOLUTION TO SUCCESSIVE POSITIONS EACH TIME THE FIRST PRESSURE RESPONSIVE ACTUATOR RECEIVES A PRESSURE IMPULSE, INCLUDING ONE POSITION IN WHICH ITS ORIFICE COVERS ITS PORT, (C) A SECOND PRESSURE RESPONSIVE ACTUATOR ASSOCIATED WITH THE SECOND PILOT VALVE FOR MOVING ITS ROTOR A PORTION OF REVOLUTION TO SUCCESSIVE POSITIONS EACH TIME THE SECOND PRESSURE RESPONSIVE ACTUATOR RECEIVES A PRESSURE IMPULSE, INCLUDING A POSITION IN WHICH ITS ORIFICE COVERS ITS PORT, (D) A FLUID PRESSURE LINE IN COMMUNICATION WITH THE PORT ON THE FIRST PILOT VALVE AND OPERATIVELY CONNECTED TO THE SECOND PRESSURE RESPONSIVE ACTUATOR AND INCLUDING A PORTION ADAPTED TO BE CONNECTED TO A PRESSURE RESPONSIVE DEVICE, AND (E) A FLUID PRESSURE LINE COMMUNICATING WITH THE PORT OF THE SECOND PILOT VALVE AND ADAPTED TO BE CONNECTED TO A PRESSURE RESPONSIVE DEVICE.