Data transmission systems

Claim 1

A DATA TRANSMISSION SYSTEM COMPRISING A TRANSDUCER AND AN AMPLIFIER, WHEREIN THE TRANSDUCER COMPRISES A CYLINDRICAL MEMBER HAVING THEREIN A CENTRAL CAVITY AND THREE FURTHER CAVITIES, DISTRIBUTED AROUND THE CENTRAL CAVITY, EACH OF SAID FURTHER CAVITIES EXTENDING FROM A RESPECTIVE OUTLET PORT IN ONE END FACE OF THE CYLINDRICAL MEMBER TO A RESPECTIVE INLET PORT IN THE OTHER END FACE OF THE CYLINDRICAL MEMBER AND BEING IN COMMUNICATION WITH AT LEAST ONE CONTROL ORIFICE LOCATED IN SAID CENTRAL CAVITY, A MODULATOR MEMBER LOCATED IN SAID CENTRAL CAVITY, A ADAPTED TO CO-OPERATE WITH SAID CONTROL ORIFICES, AND ELECTROMAGNETIC MEANS FOR APPLYING FORCES TO SAID MODULATOR MEMBER TENDING TO VARY THE POSITION OF SAID MODULATOR MEMBER IN RELATION TO SAID ORIFICES, AND WHEREIN THE AMPLIFIER COMPRISES FIRST, SECOND AND THIRD PISTONS HAVING THEIR AXES CONTAINED IN ONE PLANE AND INTERSECTING AT A SINGLE POINT AND EACH SLIDABLE IN A RESPECTIVE CYLINDER PROVIDED WITH A CONTROL PORT, MEANS FOR COUPLING THE CONTROL PORT OF EACH OF SAID CYLINDERS TO THE OUTLET PORT OF A RESPECTIVE ONE OF THE THREE FURTHER CAVITIES IN THE TRANSDUCER AND A DISPLACEABLE MEMBER CO-OPERATING WITH SAID PISTONS IN SUCH A WAY THAT IT ENSURES THAT THE DISPLACEMENT OF THE FIRST PISTON IS PROPORTIONAL TO R. COS (C-0), THE DISPLACEMENT OF THE SECOND PISTON IS PROPORTIONAL TO R. COS (B-0), AND THE DISPLACEMENT OF THE THIRD PISTON IS PROPORTIONAL TO R. COS (C-0), R AND 0 BEING VARIABLE QUANTITIES DETERMINED BY THE POSITION OF THE MODULATOR MEMBER IN THE TRANSDUCER AND A, B AND C BEING ANGULAR CONSTANTS.