Fluid flow detection apparatus

Claim 1

A FLUID FLOW METER ASSEMBLY, COMPRISING A PAIR OF ELECTRICALLY ENERGIZABLE DEVICES HAVING IMPEDANCE THAT VARY WITH TEMPEATURE, AND BODY MEANS INCLUDING FIRST AND SECOND MASSES OF THERMALLY SEMI-CONDUCTIVE AND ELECTRICALLY NON-CONDUCTIVE MATERIAL IN SOLID STATE AND IN WHICH SAID DEVICES ARE RESPECTIVELY EMBEDDED, SAID BODY MEANS HAVING FIRST AND SECOND FREE SURFACE EXTENTS EXPOSABLE TO THE FLUID MEDIUM IN SUCH RELATION TO SAID MEANS AND DEVICES THAT HEAT TRANSFER BETWEEN SAID FLUID MEDIUM AND FIRST DEVICE OCCURS PREFERENTIALLY THROUGH SAID FIRST FREE SURFACE EXTENT AND FIRST MASS AND HEAT TRANSFER BETWEEN SAID FLUID MEDIUM AND SECOND DEVICE OCCURS PREFERENTIALLY THROUGH SAID SECOND FREE SURFACE EXTENT AND SECOND MASS, SAID BODY MEANS ALSO INCLUDING HEAT INSULATIVE MATERIAL IN WHICH THE FIRST MASS IS EMBEDDED WITH SAID FIRST FREE SURFACE EXTENT EXPOSED TO THE EXTERIOR PROXIMATE SAID SECOND FREE SURFACE EXTENT, SAID FIRST DEVICE BEING SUFFICIENTLY SPACED FROM SAID FIRST FREE SURFACE EXTENT AND INTERIORLY OF SAID HEAT INSULTATIVE MATERIAL AND SAID FIRST FREE SURFACE EXTENT BEING OF SUCH REDUCED AREA IN RELATION TO THE SIZE OF THE FIRST MASS THAT CHANGES IN MOVEMENT OF CONSTANT TEMPERATURE FLUID RELATIVE TO SAID BODY MEANS ARE SUBSTANTIALLY INEFFECTIVE TO PRODUCE CHANGESIN THE IMEPDANCE OF SAID FIRS DEVICE, THE SECOND FREE SURFACE EXTENT BEING OF SUCH LARGE ARERA IN RELATION TO THE SIZE OF THE SECOND MASS THAT CHANGES IN THE MOVEMENT OF CONSTANT TEMPERATURE FLUID RELATIVE TO SAID BODY MEANS ARE EFFECTIVE TO PRODUCE CHANGES IN THE IMPEDANCE OF SAID SECOND DEVICE, CHANGES IN THE AMBIENT TEMPERATURE OF THE FLUID MEDIUM BEING EFFECTIVE TO PRODUCE CHANGES IN THE IMPEDANCES OF BOTH SAID DEVICES.