Means and techniques useful in fluid flow determinations

Claim 1

IN A SYSTEM OF THE CHARACTER DESCRIBED, MEANS DEFINING A HEAT PATH TERMINATING AT ONE END AT A FLUID REGION, A HEAT SOURCE AT THE OTHER END OF SAID PATH AND PRODUCING A CONSTANT HEAT FLUX THROUGH SAID PATH INTO SAID FLUID, TEMPERATURE SENSING MEANS SENSING A TEMPERATURE AT AN INTERMEDIATE POINT IN SAID PATH, SAID SENSING MEANS BEING A THERMOCOUPLE, A SECOND THERMOCOUPLE SENSING THE TEMPERATURE OF SAID FLUID, MEANS RESPONSIVE TO THE DIFFERENCE IN OUTPUTS OF SAID THERMOCOUPLES, THE FIRST-MENTIONED THERMOCOUPLE BEING ONE OF A SERIES OF HOT JUNCTIONS AND SAID SECOND THERMOCOUPLE BEING ONE OF A SERIES OF COLD JUNCTIONS, SAID FLUID FLOWING RELATIVE TO A CYLINDRICAL ELEMENT UPON WHICH SAID HOT AND COLD JUNCTIONS ARE MOUNTED WITH CORRESPONDING ONES OF SAID HOT AND COLD JUNCTIONS BEING SUBSTANTIALLY DIAMETRICALLY OPPOSITE, SAID HOT AND CORRESPONDING COLD JUNCTIONS OF ADJACENT PAIRS IN DIFFERENT PLANES BEING DISPLACED CIRCUMFERENTIALLY WITH RESPECT TO THE AXIS OF SAID ELEMENT.