Improvements in Rabble Shafts for Roasting Furnaces.

摘要

7471. Fowler, E. J. March 24, 1913, [Convention date]. Charges, agitating. - In a sectional rabble shaft for roasting - furnaces having an axial supply passage 6 for cold air, surrounded by an annular passage 7 for exhausting the hot air from the arms, unequal expansion of the outer and inner walls 3, 4 is allowed for by fitting the reduced end 12 of one section of the inner wall into the end 13 of the abutting section. The two walls are spaced apart by ribs 5, and the sections are connected together by flange joints 2. Specification 22,022/10 is referred to.