Fluid actuated logical devices

Claim 1

A FLUID-ACTUATED BINARY LOGICAL DEVICE INCLUDING AT LEAST FIRST AND SECOND VALVE STRUCTURES, EACH OF SAID VALVE STRUCTURES PERFORMING THE NOT FUNCTION AND HAVING A HOLLOW BODY PROVIDED WITH A CHAMBER THEREIN, SAID CHAMBER COMPRISING AT LEAST FIRST, SECOND, THIRD AND FOURTH SERIALLY CONNECTED CHAMBER PORTIONS ARRANGED FOR ALLOWING FLUID PASSAGE ALONG A PREDETERMINED PATH FROM ANY CHAMBER PORTION TO THE ADJACENT CHAMBER PORTIONS, EACH OF SAID CHAMBER PORTIONS HAVING, IN THE WALLS THEREOF, FIRST, SECOND, THIRD AND FOURTH PASSAGEWAYS, RESPECTIVELY; SAID FIRST AND FOURTH PASSAGEWAYS BEING FLUID INLET PASSAGEWAYS, SAID SECOND PASSAGEWAY BEING AN OUTLET PASSAGEWAY; MEANS, IN COMMUNICATION WITH SAID THIRD PASSAGEWAY, DELIVERING A BINARY ZERO FLUID PRESSURE LEVEL; MEANS, IN COMMUNICATION WITH AT LEAST ONE OF SAID INLET PASSAGEWAYS, DELIVERING A BINARY ONE FLUID PRESSURE LEVEL, AT LEAST THREE SEATINGS ARRANGED SUBSTANTIALLY NORMALLY TO SAID PATH, AT LEAST ONE OF SAID SEATINGS SEPARATRING SAID THIRD AND FOURTH CHAMBER PORTIONS FROM EACH OTHER; AT LEAST FIRST AND SECOND VALVE CLOSING MEMBERS MOVABLE IN SAID CHAMBER AND ADAPTED TO SEAT AGAINST SAID SEATINGS FOR CLOSING THE COMMUNICATION BETWEEN THE RESPECTIVE CHAMBER PORTIONS, SAID FIRST VALVE CLOSING MEMBER BEING ADAPTED TO CLOSE THE COMMUNICATION BETWEEN SAID FIRST AND SECOND CHAMBER PORTIONS AND BETWEEN SAID SECOND AND THIRD CHAMBER PORTIONS, SAID LOGICAL DEVICE FURTHER COMPRISING MEANS CONNECTING THE SECOND PASSAGEWAY OF SAID FIRST VALVE STRUCTURE TO AT LEAST ONE OF THE FLUID INLET PASSAGEWAYS OF SAID SECOND VALVE STRUCTURE, WHEREBY THE OPERATION OF THE SECOND VALVE STRUCTURE IS CONTROLLED BY THE OUTLET PRESSURE OF THE FIRST VALVE STRUCTURE.