Method of making pressure measuring gage means

Claim 1

THE METHOD OF PREPARING A TELLURIUM PELLET FOR USE AS THE SENSING ELEMENT OF A PRESSURE GAGE OF SMALL SIZE AND HIGH RESOLUTION WHICH COMPRISES THE STEPS OF DISTILLING ABOUT THIRTY GRTAMS OF POWDERED TELLURIUM IN A FRUNACE AT 600* C UNDER 3 MM OF HELUM REDISTILLING THE DISTILLATE INTIL NO RESIDUE IS OBTAINED, ADDING ONLY ABOUT ONE PART PER MILLION OF ANTIMONY TO THE MELTEWD DISTILLATE THEREBY TO CAUSE THE RATE OF CHAANGE OF THE RESISTIVITY DUE TO INCREASING PRESSURE, TO PASS OVER A MAXIMUM VALUE ASLUE AS THE TEMPERATURE INCREASES THROUGH A SESIRES WORKING RANGE AND RENDERING THIS RATE OF CHANGE WITH PRESSURE SUBSTANTUALLY INDENPENDENT OF TEMPERATURE NEAR THIS MAXIMUM VALUE, ZONE LEVELING THE MIXTURE, CRUSHING THE MIX TURE IN A MOTOR PASSING THE MIXTURE THROUGH A 100 MESH SCREEN REDUCING SAID MIXTURE IN HYDROGEN, PRESSING THE MIXTURE INTO A PELLET AT A PRESSURE OF 100,000 POUNDS PER SQUARE INCH, AND THEREAFTER SINTERING SAID PELLET IN HELIUM FOR ABOUT ELEVEN HOURS AT ONE ATMISPHERE AT A TEMPERATURE OF 400* C.

Claim 2

THE METHOD OF PREPARING A TELLURIUM PELLET FOR USE AS THE SENSING ELEMENT OF A PRESSURE GAGE OF SMALL SIZE AND HIGH RESOLUTION WHICH COMPRISES THE STEPS OF DISTILLING ABOUT THIRTY GRTAMS OF POWDERED TELLURIUM IN A FRUNACE AT 600* C UNDER 3 MM OF HELUM REDISTILLING THE DISTILLATE INTIL NO RESIDUE IS OBTAINED, ADDING ONLY ABOUT ONE PART PER MILLION OF ANTIMONY TO THE MELTEWD DISTILLATE THEREBY TO CAUSE THE RATE OF CHAANGE OF THE RESISTIVITY DUE TO INCREASING PRESSURE, TO PASS OVER A MAXIMUM VALUE ASLUE AS THE TEMPERATURE INCREASES THROUGH A SESIRES WORKING RANGE AND RENDERING THIS RATE OF CHANGE WITH PRESSURE SUBSTANTUALLY INDENPENDENT OF TEMPERATURE NEAR THIS MAXIMUM VALUE, ZONE LEVELING THE MIXTURE, CRUSHING THE MIX TURE IN A MOTOR PASSING THE MIXTURE THROUGH A 100 MESH SCREEN REDUCING SAID MIXTURE IN HYDROGEN, PRESSING THE MIXTURE INTO A PELLET AT A PRESSURE OF 100,000 POUNDS PER SQUARE INCH, AND THEREAFTER SINTERING SAID PELLET IN HELIUM FOR ABOUT ELEVEN HOURS AT ONE ATMISPHERE AT A TEMPERATURE OF 400* C.