28o 



DEVELOPMENTS IN OIL BURNING. 



The air for combustion is admitted through annular openings formed 

 between concentric rings or short cyUnders strung together to form a sort 

 of truncated cone, somewhat similar to the device shown in Figs. 19 and 20, 

 except that the air is not directed toward the center. 



Fig. 33. 



Normand (Fig. 33). — Eight small ducts deUver the oil tangentially to 

 the centraHchamber^formed^by^the^combination of the tip and an adjustable 

 spindle. The chamber is recessed so that the movement of the spindle does 

 not in any way close or affect the ducts, its office being, besides forming one 

 wall of the chamber, to close or throttle the outlet orifice. In this burner the 

 ducts and outlet passage and orifice are made in a single piece which is held 

 to the pipe or body of the burner by a clamp. 



The air-distributing device or tuyere consists of a truncated cone of 

 sheet iron fitted on a portion of its surface with blades for giving the air a 

 whirling motion (Fig. 34). 



Fig. 34. 



Schiitte-Koerting (Fig. 35). — The tip of this burner is chambered out to 

 receive a small spindle, less in diameter than the chamber except at the end, 

 which is provided with a triple parallel thread which just fits the chamber 

 and forms with the surface of the chamber three helical passages which 

 deUver the oil to a smaller chamber at the end of the spindle, communicating 

 with the outlet orifice. The spindle is not adjustable, the burner capacity 



