Measuring apparatus

Claim 1

A FLOWMETER TO MEASURE THE FLOW RATE OF A FLUID STREAM FLOWING IN AN UPSTREAM TO DOWNSTREAM DIRECTION, COMPRISING A UNITARY, ELONGATED FLOW SENSING MEMBER, SAID MEMBER HAVING AN INNER AND OUTER WALL SURFACE AND BEING COMPLETELY IMMERSED IN THE STREAM, THE INNER WALL SURFACE OF THE MEMBER BEING CONSTRUCTED TO FORM AN OPEN ELONGATED PASSAGEWAY, EXTENDING BETWEEN AN UPSTREAM AND DOWNSTREAM PORTION OF THE FLUID UNDER MEASUREMENT, THE UPSTREAM END OF THE MEMBER BEING OPERABLY CONNECTED FOR OSCILLATION ON STATIONARY PIVOT BLOCKS WHOSE AXES ARE PERPENDICULAR TO THE FLOW OF THE FLUID STREAM UNDER MEASUREMENT, THE FLOW SENSING MEMBER BEING CONSTRUCTED TO OSCILLATE ON SAID PIVOT BLOCKS AT A FREQUENCY THAT IS LINEARLY PROPORTIONAL TO THE FLOW RATE OF THE FLUID STREAM AS THE FLUID UNDER MEASUREMENT PASSES THROUGH THE PASSAGEWAY FORMED BY THE INNER WALL OF THE MEMBER, THE FLOW SENSING MEMBER BEING COMPRISED OF A PERFORATED TUBE HAVING A RESTRICTION EXTENDING ACROSS A PORTION OF ITS DOWNSTREAMD END, A CONDUIT POSITIONED TO SURROUND THE FLOWING STREAM UNDER MEASUREMENT, MEANS CONNECTED TO THE CONDUIT TO ACCOMMODATE THE MOUNTING OF THE STATIONARY PIVOT BLOCKS ON WHICH THE TUBE OSCILLATES IN OPPOSITE SIDE PORTIONS OF THE CONDUIT AND WHEREIN AN ELECTROMECHANICAL RESPONSIVE MEANS IS OPERABLY ASSOCIATED WITH THE MEANS TO MEASURE THE FREQUENCY AT WHICH THE FLOW SENSING MEMBER IS OSCILLATED.