Tube cracking furnace

Claim 1

A FURNACE FOR THEREMALLY CONVERTING NORMALLY GASEOUS HYDROCARBONS INTO OTHER HYDROCARBONS COMPRISING A PLURALITY OF HORIZONTALLY EXTENDING REACTION TUBES SUPPORTED BY AND POSITIONED IN SEPARATED REFRACTORY WALLS, A FIRST WALL OF SAID SEPARATED SUPORTING WALLS AT ONE END OF SAID TUBES AND A SECOND OF SAID WALLS TOGETHER WITH SAID FIRST WALL DEFINING A VERTICAL PASSAGEWAY ABOUT THE EXTERIOR PORTIONS OF SAID TUBES, A FRONT ENCLOSING WALL FOR SAID FURNACE SEPARATED FROM SAID FIRST SUPPORTING WALL AND EXTENDING SO AS TO FORM A RELATIVELY NARROW FRONTAL CHAMBER INTO WHICH SAID TUBES OPEN AND WHICH COMMUNICATES AT THE TOP THEREOF WITH SAID VERTICAL PASSAGEWAY, A THIRD WALL OF SAID SUPPORTING WALLS AT THE OPPOSITE ENDS OF SAID TUBES AND A REAR ENCLOSING WALL FOR THE FURNACE DEFINING A RELATIVELY NARROW REAR CHAMBER INTO WHICH SAID TUBES OPEN, A PLURALITY OF INLETS INTO SAID FIRST CHAMBER, AN INLET INTO THE BOTTOM OF SAID VERTICAL PASSAGE, A PLURALITY OF SMALL OUTLETS FROM SAID REAR CHAMBER AND PIPES EXTENDING THROUGH SAID REAR CHAMBER AND FOR A SUBSTANTIAL DISTANCE INTO SAID TUBES AND CONCENTRICALLY ARRANGED THEREIN.