Improved Method of Attaching Top Boxes and Tubes of Fuel Economisers together, applicable also when Replacing New Tubes and Top Boxes.

摘要

17,870. Balkwill, A. J. Oct. 8. Plates, walls, and the like, securing tubes to.- The tubes of fuel-economizers are secured in the " top boxes " by means of ferrules D of wedge-shape section, the tubes, and the hole in which they are inserted, being oppositely coned as shuwn.