Oxygen analyzer-standardizer

Claim 1

IN AN APPARATUS FOR CONTINUOUSLY MONITORING A PROCESS GAS SAMPLE, INCLUDING AN ANALYZER, A FIRST VALVED CONDUIT MEANS FOR DELIVERING A PROCESS GAS SAMPLE TO SAID ANALYZER, A SOURCE OF CALIBRATION GAS OF KNOWN COMPOSITION, A SECOND VALVED CONDUIT MEANS FOR DERLIVERING A CALIBRATION GAS SAMPLE TO SAID ANALYZER, THE IMPROVEMENT WHEREBY SAID ANALYZER MAY BE STANDARDIZED BOTH AUTOMATICALLY AND MANUALLY WHILE IN SERVICE COMPRISING: A SHORT PERIOD CYCLE TIMER CONTROLLING BOTH OF SAID VALVED CONDUIT MEANS TO INTERRUPT PROCESS GAS SAMPLE FLOW THROUGH SAID FIRST VALVED CONDUIT MEANS AND TO PERMIT CALIBRATION GAS FLOW THROUGH SAID SECOND VALVED CONDUIT MEANS FOR A CONTROLLED PERIOD OF TIME TO EFFECT STANDARDIZATION OF SAID ANALYZER AND THEREAFTER RETURN THE RESPECTIVE FLOWS TO THEIR ORIGINAL CONDITION, A LONG PERIOD CYCLE TIMER CONTROLLING SAID SHORT PERIOD CYCLE TIMER AND THEREBY DETERMINING THE CYCLE OVER WHICH SAID SHORT PERIOD CYCLE TIMER OPERATES, AND MANUAL SWITCH MEANS INDEPENDENTLY CONTROLLING SAID SHORT PERIOD CYCLE TIMER TO EFFECT MANUAL STANDARDIZATION.