Methods of and apparatus for calibrating measuring systems for constituent potentials

Claim 1

THE METHOD OF CALIBRATING AN ELECTRICAL MEASURING SYSTEM FOR MEASUREMENT OF A CONSTITUENT POTENITAL OF AN ATMOSPHERE IN TERMS OF CHANGE IN RESISTANCE OF A FILAMENTARY FERROUS METAL WITH CHANGE IN SAID CONSTITUENT POTENTIAL DUE TO TRANSFERENCE OF THE CONSTITUENT TO AND FROM SAID METAL, WHICH COMPRISES PROGRESSIVELY REDUCING SAID CONSTITUENT PROTENTIAL OF THE ATMOSPHER SURROUNDING SAID FILAMENTARY METAL TO PRODUCE TRANSFERENCE OF SAID CONSTITUENT FROM SAID FILAMENT TO SAID ATMOSPHERE WITH PROGRESSIVE REDUCTION OF THE RESISTANCE OF SAID FILAMENTARY METAL, SAID RESISTANCE ATTAINING A TEMPORARILY FIXED BUT UNKNOWN VALUE AT THE TIME SAID CONSTITUENT WITHIN SAID FILAMENTARY METAL REACHES A KNOWN REPRODUCIBLE LOW VALUE, AND ADJUSTING THE RESPONSE OF THE MEASURING SYSTEM TO SAID FIXED BUT UNKNOWN VALUE OF SAID RESISTANCE TO COINCIDE WITH SAID REPRODUCIBLE LOW VALUE OF SAID CONSTITUENT PRIOR TO RISE OF RESISTANCE OF SAID FILAMENTARY METAL DUE TO CAUSES OTHER FURTHER CHANGE OF SAID CONSTITUENT WITHIN SAID FILAMENTARY METAL.