Gas purifying arrangement

Claim 1

A HYDROGEN PURIFYING DEVICE, COMPRISING: A MOUNTING BLOCK OF THERMALLY CONDUCTING MATERIAL PROVIDED WITH A PAIR OF SPACED APART ELONGATED CAVITIES; A CARTRIDGE TYPE HEATER MEANS REMOVABLY DISPOSED IN ONE OF SAID CAVITIES; A FILTER UNIT REMOVABLY DISPOSED IN THE OUTER OF SAID CAVITIES, SAID FILTER UNIT INCLUDING A TUBULAR BODY MEMBER EXTENDING ALONG SAID OTHER CAVITY, ONE END OF SAID BODY MEMBER BEING PROVIDED WITH A FLANGE RESTING ON ONE SURFACE OF SAID MOUNTING BLOCK AND BEING FORMED WITH A LARGE DIAMETER INTERNALLY THREADED PORTION, SAID BODY MEMBER INCLUDING A CENTRAL PORTION FORMED WITH A LONG, CYLINDRICAL SMOOTH BORE OF SMALLER DIAMETER THAN SAID THREADED PORTION, A TAPERED ANNULAR SURFACE JOINING SAID THREADED PORTION AND SAID CENTRAL PORTION, AND AN INLET TUBE JOINED TO SAID CENTRAL PORTION AND PROTRUDING FROM ANOTHER SURFACE OF SAID MOUNTING BLOCK; A TUBULAR FILTER ELEMENT MADE OF PALLADIUM-SILVER ALLOY DISPOSED WITHIN SAID CYLINDRICAL BORE, SAID FILTER ELEMENT HAVING A TAPERED OPENING ADJACENT TO SAID TAPERED SURFACE AND BEING CLOSED AT ITS OTHER END ADJACENT TO SAID INLET TUBE; AN OULET TUBE HAVING A BEVELED END RESTING ON THE TAPERED OPENING OF SAID FILTER ELEMENT AND HAVING ITS OPPOSITE END PROTRUDING BEYOND SAID MOUNTING BLOCK, THE MAIN BODY OF SAID OUTLET TUBE FORMING A SHOULDER WITH SAID BEVELED END, AND AN EXTERNALLY THREADED NUT ENGAGING SAID THREADED BODY MEMBER PORTION AND PROVIDED WITH A CENTRAL OPENING THROUGH WHICH SAID OUTLET TUBE EXTENDS, SAID NUT BEING MOVABLE TO ENGAGE THE SHOULDER OF SAID OUTLET TUBE AND FORCE SAID BEVELED END OF SAID OUTLET TUBE, SAID TAPERED OPENING OF SAID FILTER ELEMENT, AND SAID TAPERED ANNULAR SURFACE OF SAID BODY MEMBER INTO GAS TIGHT SEALING ENGAGEMENT, SAID OUTLET TUBE AND SAID BODY MEMBER BEING MADE FROM MATERIAL HAVING A THERMAL EXPANSION COEFFICIENT MATCHING THAT OF SAID FILTER ELEMENT.