Improvements in or relating to kilns for drying and burning bricks, applicable also to lime kilns and furnaces for heating billets

摘要

188,074. Harrison, H. Aug. 2, 1921. Roller bearings; bushes. -A fixed axle n carrying the roller bearing m of a truck for use in a tunnel kiln, is formed with a groove, for accommodating a helical spring o, which takes the wear.