Signal transmitting circuit for remote sensing of petroleum flow

Claim 1

IN A PETROLEUM PRODUCT MEASURING SYSTEM HAVING A TURBINE METER FOR RECORDING THE VOLUMETRIC FLOW AND AN ALTERNATING CURRENT SIGNAL GENERATOR COUPLED TO AND DRIVEN BY THE METER, THE IMPROVEMENT OF A REMOTE RECORDING AND TRANSMISSION SYSTEM COMPRISING, A REMOTE PULSE RECORDING MEANS AT A REMOTE LOCATION WITH RESPECT TO THE METER, A TWO STAGE AMPLIFYING MODULE FOR MOUNTING AT THE METER AND HAVING AN INPUT STAGE WITH AN INPUT MEANS CONNECTED TO THE GENERATOR AND AN OUTPUT STAGE HAVING AN INPUT MEANS AND AN OUTPUT MEANS WITH AN ENERGY STORAGE MEANS IN THE OUTPUT MEANS CONNECTED TO SUPPLY BIAS POWER TO THE INPUT STAGE WHEN THE OUTPUT STAGE IS CUT OFF, A SINGLE PAIR OF SIGNAL AND POWER TRANSMISSION LINES CONNECTED TO THE INPUT MEANS OF THE OUTPUT STAGE AND TO THE OUTPUT MEANS OF THE MODULE AND TO THE RECORDING MEANS TO SUPPLY BIAS POWER TO THE OUTPUT STAGE, AND POWER MEANS AT THE REMOTE LOCATION CONNECTED ACROSS SAID LINES TO TRANSMIT OPERATING POWER TO THE AMPLIFYING MODULE.