Continuous automatic viscosimeter

Claim 1

A CONTINUOUS FLOW VISCOSIMETER APPARATUS INCLUDING A PRODUCT LINE, A CLOSED HIGH PRESSURE CIRCULATING SYSTEM IN PARALLEL WITH SAID LINE, A FIRST SAMPLE CONDUIT LEADING FROM SAID SYSTEM, A HEAT EXCHANGER PROVIDING A MULTIPLICITY OF PARALLEL FLOWS THERETHROUGH SAID HEAT EXCHANGER INCLUDING AN INLET MANIFOLD, AN OUTLET MANIFOLD, AND A MULTIPLICITY OF TUBING STRANDS PROVIDING PARALLEL FLOW BETWEEN SAID MANIFOLDS, SAID FIRST CONDUIT DISCHARGING INTO SAID INLET MANIFOLD, A DISCHARGE LINE FROM THE OUTLET MANIFOLD OF SAID HEAT EXCHANGER, A CONSTANT VOLUMETRIC FLOW RATE METERING MEANS CONNECTED TO SAID DISCHARGE LINE, SAID METERING MEANS COMPRISING A METERING DEVICE AND A ZERO DIFFERENTIAL PRESSURE REGULATOR ACROSS THE INLET AND OUTLET OF SAID METERING DEVICE, SAID DIFFERENTIAL PRESSURE REGULATOR MAINTAINING A CONSTANT PRESSURE DIFFERENTIAL ACROSS THE METERING DEVICE SUCH THAT THE SLIPPAGE OF THE METERING DEVICE IS SUBSTANTIALLY CONSTANT REGARDLESS OF THE VISCOSITY OF THE SAMPLE PASSING THERETHROUGH, A CAPILLARY IN SAID DISCHARGE LINE AND MEANS IN SERIES WITH SAID METERING MEANS, AND A SECOND CONDUIT MEANS IN SERIES FLOW WITH SAID CAPILLARY MEANS FOR RETURNING THE SAMPLE TO SAID PRODUCT LINE.