Composition monitor for gaseous materials

Claim 1

APPARATUS FOR THE DETECTION OF CONTAMINANTS IN A GAS COMPRISING, IN COMBINATION, A RECEPTACLE, SAID RECEPTACLE INCLUDING A TRANSPARENT, CYLINDRICAL CONTAINER HAVING A CAVITY THEREIN, A SEAL PLATE AND SEAL PLATE SECURING DEVICES FOR HERMETICALLY SEALING SAID CONTAINER, SAID SEAL PLATE BEING COMPOSED OF THREE SUPERPOSED BONDED LAYERS OF TRANSPARENT MATERIAL, RETAINING DEVICES FOR RETAINING A REMOVABLE, METAL INDICATOR SPECIMEN IN SAID CAVITY, AN INLET APERTURE COMMUNICATING WITH SAID CAVITY FORMED BY A THROUGH LONGITUDINAL OPENING IN THE WALL OF SAID CONTAINER, A PERIPHERAL OPENING IN THE REARMOST LAYER OF SAID SEAL PLATE, A RADIAL SLOT IN THE INTERMEDIATE LAYER OF SAID SEAL PLATE AND A CENTRAL OPENING IN SAID REARMOST LAYER, AN OUTLET APERTURE COMMUNICATING WITH SAID CAVITY THROUGH THE REAR FACE OF SAID CONTAINER, CONDUIT MEANS CONNECTED TO SAID INLET AND OUTLET APERTURES FOR CIRCULATING SAID GAS THROUGH SAID RECEPTACLE, VALVE MEANS DISPOSED WITHIN SAID CONDUIT MEANS FOR CONTROLLING THE CIRCULATION OF SAID GAS THROUGH SAID CONDUIT MEANS, ELECTRICAL MEANS FOR OPERATING SAID VALVE MEANS AND FOR HEATING SAID INDICATOR SPECIMEN TO A PREDETERMINED TEMPERATURE FOR A PREDETERMINED TIME, WHEREBY ANY CONTAMINANTS IN SAID GAS ARE REACTED WITH SAID INDICATOR SPECIMEN THEREBY CAUSING AN OBSERVABLE CHANGE IN THE CHARACTERISTICS OF SAID INDICATOR SPECIMEN.