High pressure electrical resistance cell

Claim 1

THE HIGH-PRESSURE AND HIGH-TEMPERATURE REACTION APPARATUS CONTAINING A REACTION VESSEL WITHIN A PUNCH AND DIE ASSEMBLY OF THE BELT TYPE THAT MINIMIZES THE POISSON EFFECT COMPRISING A FIRST BORON NITRIDE CYLINDER AS A SPECIMEN HOUSING FIRST REACTION CELL FOR THE DISPOSITION THEREIN OF THE SPECIMEN TO BE TESTED; A GRAPHITE CYLINDER CONCENTRIC WITH AND RADIALLY OUTWARDLY FROM THE BORON NITRIDE CYLINDER THROUGH THE CYLINDER LENGTHS; A LAVA PLUG WITHIN EACH OPPOSITE END OF THE BORON NITRIDE CYLINDER; A GRAPHITE DISK OVERLYING EACH OF THE OPPOSTE ENDS OF BOTH THE FIRST BORON NITRIDE CYLINDER AND THE GRAPHITE CYLINDER; A SECOND BORON NITRIDE CYLINDER RADIALLY OUTSIDE OF AND CONCENTRIC WITH BOTH THE FIRST BORON NITRIDE CYLINDER AND THE GRAPHITE CYLINDER AND IN THE OPPOSITE ENDS OF WHICH THE SAID GRAPHITE DISKS ARE POSITIONED; A PAIR OF FRUSTO-CONICAL LAVA WALLS SPACED FROM AND OPENING AWAY FROM EACH OTHER ON THE OUTSIDE OF THE GRAPHITE CYLINDER AND THE WALLS EXTENDING AXIALLY BEYOND THE OPPOSITE ENDS OF THE GRAPHITE CYLINDER IN OPEN FRUSTO-CONICAL FUNNEL CONTOUR END PORTIONS; A PAIR OF ALUMINA SHEATHED THERMOCOUPLE LEAD WIRES ENCASED WITHIN THE LAVAL WALLS LAND JOINED IN THEIR HOT JUNCTION IN CONTACT WITH THE OUTER SURFACE OF THE SECOND BORON NITRIDE CYLINDER AND BENEATH THE LAVA CYLINDER ABOUT MIDWAY BETWEEN THE OPPOSTE CYLINDER ENDS; A PAIR OF ALUMINA SHEATHED PLATINUM RESISTANCE WIRES ENCASED WITHIN THE LAVA WALLS SUBSTANTIALLY REMOTE DIAMETRICALLY FROM THE THERMOCOUPLE LEAD WIRES; A PAIR OF PLATINUM RESISTANCE-WIRE ENCASING ALUMINA PLUGS EXTENDING RADIALLY THROUGH THE WALLS OF THE LAVA CYLINDER, THE GRAPHITE CYLINDER AND THROUGH BOTH THE FIRST AND THE SECOND BORON NITRIDE CYLINDERS TO WITHIN THE SPECIMEN TEST CHAMBER, AND A JPAIR OF PLATINUM SHEET CONTACTS AT THE OPPOSITE ENDS OF THE REACTION CELL PROVIDED BY THE FIRST BORON NITRIDE CYLINDER AND EACH PLATINUM SHEET CONTACT WELDED TO ITS END OF ITS PLATINUM RESISTANCE WIRE.