Gas analyzing devices

Claim 1

IN A CATALYTIC GAS ANALYZER; A METALLIC BLOCK HOUSING INCLUDING; REGULATORS IN THE HOUSING BLOCK FOR MAINTAINING FLUID INTO THE BLOCK UNDER CONSTANT PRESSURE, FIRST AND SECOND CYLINDRICAL CELL CAVITIES IN THE BLOCK, A FIRST PASSAGE ARRANGED TO INTRODUCE A SAMPLE OF GAS TO BE ANALYZED FROM THE REGULATORS INTO THE FIRST CELL CAVITY CLOSELY ADJACENT ONE END THEREOF AND TANGENTIAL TO THE CAVITY WALL, A SECOND PASSAGE ARRANGED TO INTRODUCE A COMBUSTION SUPPORTING FLUID FROM THE REGULATORS INTO THE FIRST CELL CAVITY CLOSELY ADJACENT THE SAME ONE END OF SAID FIRST CELL CAVITY THE GAS SAMPLE IS INTRODUCED AND TANGENTIAL AND OPPOSITE IN FLOW DIRECTION TO THAT OF THE GAS SAMPLE, A THIRD PASSAGE FROM THE OTHER END OF THE FIRST CELL CAVITY TO THE SECOND CELL CAVITY, AN EXHAUST PASSAGE FROM SAID SECOND CELL CAVITY AND AN ELECTRICAL HEATER FOR CONTROLLING THE BLOCK TEMPERATURE; A FIRST SHIELD WITHIN THE FIRST CELL CAVITY, SAID FIRST SHIELD HAVING IN ONE END THEREOF AN OPENING OF LARGE CROSS-SECTIONAL AREA; A SECOND SHIELD WITHIN THE SECOND CELL CAVITY, SAID SECOND SHIELD HAVING IN ONE END THEREOF AN OPENING OF SMALL CROSS-SECTIONAL AREA; IDENTICAL FILAMENTS LOCATED WITHIN EACH SHIELD AND COMPLETELY ENCLOSED THEREBY; AND AN ELECTRICAL NETWORK INCLUDING THE FILAMENTS FOR HEATING THEM TO THE SAME TEMPERATURE.