Dust Box.

Patent for a new and improved dust-box. This design consists in "[t]he combination, with a floor having an aperture cut into it and provided with a door flush with the surface of the floor, of a dust-box having a square bottom and diverging sides formed with outwardly-projecting flanges re-enforced upon their under sides by plates or bars and having strips secured to the inner sides, having their upper ends bent inward" (lines 76-83)