Surface heater arrangement

Claim 1

A SURFACE HEATER COMPRISING IN COMBINATION: A FRAME MEMBER; SUPPORTING WHEELS COUPLED TO SAID MEMBER; AN INTERMEDIATE FRAME MOVABLY COUPLED TO SAID FRAME MEMBER FOR RELATIVE VERTICAL MOVEMENT WITH RESPECT TO SAID FRAME MEMBER; MOTION PRODUCING MEANS COUPLED TO SAID FRAME MEMBER AND SAID INTERMEDIATE FRAME FOR VERTICALLY MOVING SAID INTERMEDIATE FRAME WITH RESPECT TO SAID FRAME MEMBER; A PAIR OF HOOD WING MEMBERS, SLIDINGLY SUPPORTED FROM SAID INTERMEDIATE FRAME MEMBER AND EACH OF SAID HOOD WING MEMBERS COMPRISING A TOP PORTION, A DOWNWARDLY-DEPENDING SIDE WALL PORTION COUPLED TO AN OUTER EDGE OF SAID TOP PORTION, AND A DOWNWARDLY-DEPENDING BACK PORTION COUPLED TO A REAR EDGE OF SAID TOP PORTION AND A REAR EDGE OF SAID SIDE WALL PORTION, AND AT LEAST ONE OF SAID PAIR OF HOOD WING MEMBERS HAVING A PLURALITY OF MOVABLE BURNER PLATES PIVOTALLY COUPLED TO A FORWARD EDGE OF SAID TOP PORTION, AND A HEAT RESISTANT MATERIAL COUPLED TO PRESELECTED INTERIOR SURFACE PORTIONS OF EACH OF SAID HOOD WING MEMBERS, SAID PAIR OF HOOD WING MEMBERS DEFINING A VOLUME COMPRISING AT LEAST PART OF A BURNER CAVITY; MEANS FOR SLIDINGLY MOVING SAID PAIR OF HOOD WING MEMBERS LATERALLY OF SAID INTERMEDIATE FRAME TO SELECTIVELY INCREASE AND DECREASE THE VOLUME DEFINED BY SAID PAIR OF HOOD WING MEMBERS AND TO SHIFT SAID PAIR OF HOOD WING MEMBERS LATERALLY OF SAID INTERMEDIATE FRAME; AND MEANS FOR GENERATING THERMAL ENERGY IN SAID VOLUME DEFINED BY SAID PAIR OF HOOD WING MEMBERS.