Heat exchanger tube support

Claim 1

A HEAT EXCHANGER HAVING A FURNACE, MEANS FOR BURNING AN ASH LADEN FUEL THEREIN, A VERTICAL FLUE FOR THE CONDUCTION OF COMBUSTION GASES FROM SAID FURNACE, HORIZONTAL SERPENTINE TUBULAR FLUID HEATING ELEMENTS, DISPOSED IN SAID VERTICAL FLUE, EACH OF SAID SERPENTINE ELEMENTS COMPRISING A PLURALITY OF HORIZONTAL TUBES, VERTICAL SUPPORT TUBES EXTENDING THROUGH SAID VERTICAL FLUE ADJACENT THE SERPENTINE ELEMENTS, MEANS FOR SUPPORTING A HORIZONTAL TUBE OF ONE OF SAID HEATING ELEMENTS FROM THE VERTICAL SUPPORT TUBE COMPRISING: A SADDLE WELDED TO THE VERTICAL SUPPORT TUBE, SAID SADDLE HAVING AN UPPER LIP PROJECTING VERTICALLY UPWARD AND EXTENDING PARALLEL TO SAID HORIZONTAL TUBE, AND A LOWER LIP PROJECTING VERTICALLY DOWNWARD AND EXTENDING HORIZONTALLY PARALLEL TO SAID HORIZONTAL TUBE; AN UPPER JAW WELDED TO SAID HORIZONTAL TUBE SLIDABLY ENGAGING SAID UPPER LIP; A LOWER JAW WELDED TO SAID HORIZONTAL TUBE SLIDABLY ENGAGING SAID LOWER LIP; AND SAID LOWER JAW EXTENDING LONGITUDINALLY WITH THE HORIZONTAL TUBE A LESSER DISTANCE THAN THE UPPER JAW, AND LOCATED SUCH THAT ALL PORTIONS OF SAID LOWER JAW ARE VERTICALLY UNDERNEATH SOME PORTION OF SAID UPPER JAW.