doi:DE10016386The device for the elimination of dust and soot formation when sweeping a chimney or smoke flue, where the opening is in the room, includes a dust and soot trap to shut off the cleaning opening.PIAZZA MARIA
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657,160. Chimney sweeping equipment. CHALLIS. R. D. Jan. 22, 1949, No. 1802. [Class 126] Apparatus for use in chimney sweeping comprises a rigid flat plate fixed against the firegrate to seal the firegrate opening, an aperture 7 having secured to its edges the wider end of an ...
The device for the elimination of dust and soot formation when sweeping a chimney or smoke flue, where the opening is in the room, includes a dust and soot trap to shut off the cleaning opening.PIAZZA, MARIA