Gas measuring device

Claim 1

AN APPARATUS FOR MEASURING THE CONSTITUENTS OF A GASEOUS MIXTURE WHICH COMPRISES, IN COMBINATION, AREACTION CHAMBER PERMEABLE TO ACTINE RADIATION, INLET MEANS FOR SUPPLYING THE GASEOUS MIXTURE TO BE ANALYZED TO SAID CHAMBER, FIRST VALVE MEANS IN SAID INLET MEANS, OUTLET MEANS FOR REMOVING THE PRODUCTS OF THE REACTION FROM SAID REACTION CHAMBER, SECOND VALVE MEANS IN SAID OUTLET MEANS, MEANS FOR INDUCING A PREDETERMINED VACUUM IN SAID REACTION CHAMBER, A MANOMETRIC ASSEMBLY IN FLUID COMMUNICATING RELATIONSHIP WITH SAID REACTION CHAMBER, SAID MANOMETRIC ASSEMBLY INCLUDING A MANOMETRIC LIQUID WHICH IS A CONDUCTOR OF ELECTRICITY, A READING UNIT AND AN INDICATOR UNIT IN AN ELECTRICAL CIRCUIT ADAPTED TO BE CLOSED BY SAID MANOMETRIC LIQUID TO INDICATE A PREDETTERMINED LIMIT OF CONCENTRATION OF A GAS IN SAID GASEOUS MIXTURE, MEANS FOR EFFECTING PERIODIC ILLUNINATION OF THE REACTION CHAMBER BY SAID ACTINIC LIGHT, AND AUTOMATIC CONTROL MEANS FOR SELECTIVELY OPERATING SAID FIRST VALVE MEANS SAID SECOND VALVE MEANS, AND SAID EMEANS FOR EFFECTING PERIODIC ILLUMINATION OF SAID REACTION CHAMER, SAID MANOMETRIC ASSEMBLY COMPRISING A RECEIVER PROVIDED WITH A FEED TUBE AND MEANS FOR DEGASSING THE MANOMETRIC LIQUID, A BELL SUBMERGED IN SAID RECEIVER AND FITTED WITH A READING TUBE CONNECTED WITH THE REACTION CHAMBER, AND SAID INDICATOR UNIT COMPRISING AN ELECTRODE CONSTANTLY SUBMERGED IN THE MANOMETRIC LIQUID, AN ELECTRODE DISPOSED IN THE READING TUBE AT A HEIGHT CORRESPONDING TO AN AMOUNT OF GAS CORRESPONDING TO SAID PREDETERMINED LIMIT WELL BELOW THE EXPLOSIVE LIMIT, AND AN AUDIBLE INDICATOR IN SAID CIRCUIT WHICH OPERATES WHEN SAID ELECTRIC CIRCUIT IS CLOSED.

Claim 2

AN APPARATUS FOR MEASURING THE CONSTITUENTS OF A GASEOUS MIXTURE WHICH COMPRISES, IN COMBINATION, AREACTION CHAMBER PERMEABLE TO ACTINE RADIATION, INLET MEANS FOR SUPPLYING THE GASEOUS MIXTURE TO BE ANALYZED TO SAID CHAMBER, FIRST VALVE MEANS IN SAID INLET MEANS, OUTLET MEANS FOR REMOVING THE PRODUCTS OF THE REACTION FROM SAID REACTION CHAMBER, SECOND VALVE MEANS IN SAID OUTLET MEANS, MEANS FOR INDUCING A PREDETERMINED VACUUM IN SAID REACTION CHAMBER, A MANOMETRIC ASSEMBLY IN FLUID COMMUNICATING RELATIONSHIP WITH SAID REACTION CHAMBER, SAID MANOMETRIC ASSEMBLY INCLUDING A MANOMETRIC LIQUID WHICH IS A CONDUCTOR OF ELECTRICITY, A READING UNIT AND AN INDICATOR UNIT IN AN ELECTRICAL CIRCUIT ADAPTED TO BE CLOSED BY SAID MANOMETRIC LIQUID TO INDICATE A PREDETTERMINED LIMIT OF CONCENTRATION OF A GAS IN SAID GASEOUS MIXTURE, MEANS FOR EFFECTING PERIODIC ILLUNINATION OF THE REACTION CHAMBER BY SAID ACTINIC LIGHT, AND AUTOMATIC CONTROL MEANS FOR SELECTIVELY OPERATING SAID FIRST VALVE MEANS SAID SECOND VALVE MEANS, AND SAID EMEANS FOR EFFECTING PERIODIC ILLUMINATION OF SAID REACTION CHAMER, SAID MANOMETRIC ASSEMBLY COMPRISING A RECEIVER PROVIDED WITH A FEED TUBE AND MEANS FOR DEGASSING THE MANOMETRIC LIQUID, A BELL SUBMERGED IN SAID RECEIVER AND FITTED WITH A READING TUBE CONNECTED WITH THE REACTION CHAMBER, AND SAID INDICATOR UNIT COMPRISING AN ELECTRODE CONSTANTLY SUBMERGED IN THE MANOMETRIC LIQUID, AN ELECTRODE DISPOSED IN THE READING TUBE AT A HEIGHT CORRESPONDING TO AN AMOUNT OF GAS CORRESPONDING TO SAID PREDETERMINED LIMIT WELL BELOW THE EXPLOSIVE LIMIT, AND AN AUDIBLE INDICATOR IN SAID CIRCUIT WHICH OPERATES WHEN SAID ELECTRIC CIRCUIT IS CLOSED.