IMPROVEMENTS IN CHIMNIES OR CHIMNEY POTS
Year: 1877

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Patent Agents, of 67, Strand, in the City of Westminster, Civil
Engineer, for the Invention of "IMPROVEMENTS IN CHIMNIES OR CHIMNEY
POTS." A communication from abroad by William Puttemans and Eugèno
Wery, both of Paris, in the Republic of France.
Sealed the 3rd August 1877, and dated the 7th April 1877.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 7th April 1877.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Patent Agents,
"IMPROVEMENTS IN
of 67, Strand, in the City of Westminster, Civil Engineer.
CHIMNIES OR CHIMNEY POTS." A communication from abroad by William
Puttemans and Eugène Wery, both of Paris, in the Republic of France.
The improvements consist in forming the caps or pots of smoke and ventilating
shafts of two distinct tubes, an inner and an outer, filling up the space between
them, or nearly so, with blades or bands, and arranging the outer tube that it may
at the base not entirely cover the inner tube but leave a space for the entrance of
air which passes between the inner and outer tube in an upward direction. Further,
in supplying to such pots or caps, to be fixed within the inner tube, a helical plato
or plates fixed to a spindle capable of rotation, and thereby allowing the passage
upwards of smoke or air and preventing down draught.
The improvements may be constructed in metal or any convenient material.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Herbert John Haddan in the Great Seal Patent Office on the 4th
October 1877.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Patent Agents,
of 67, Strand, in the City of Westminster, Civil Engineer.
"IMPROVEMENTS IN
1

page_text: CHIMNIES OR CHIMNEY POTS." A communication from abroad by William
Puttemans and Eugène Wery, both of Paris, in the Republic of France.
The improvements consist in forming the caps or pots of smoke and ventilating
shafts of two distinct tubes, an inner and an outer, and sometimes filling up the
space between them, or nearly so, with blades or bands, and arranging the outer
tube that it may not entirely cover the inner tube but leave a space for the
entrance of air which passes between the inuer and outer tube in an upward
direction. Further, in supplying to such pots or caps, to be fixed within the inner
tube, a helical plate or plates fixed to a spindle capable of rotation, and thereby
allowing the passage upwards of smoke or air and preventing down draught.
The improvements may be constructed in metal or any convenient material.
The accompanying Drawing will show how the Invention is to be performed.
Figure 1 is an elevation of a chimney or ventilator shaft composed of pieces
A, B, C, as shown, the part A is shown in Fig. 2, uncovered by the outer tube B,
and surrounded with the helical band E, as shown; the part C, Fig. 1, has some- 1
times within it the helical apparatus D, shown in plan and section, Figs.
and 4;
the cap or pot being fixed, as shown in Fig. 1, the air enters by the space F, passes
upwards and over the surface of the tube A and its band E, and thence through the
apparatus D, if used, otherwise, simply through the tube C.
Figs. 5 and 6 are respectively section and elevation of another mode of performing 2
the Invention, G being air inlets and H the smoke tube.
I claim the combination of the inner and outer shafts A and B with the band E
together with the helical apparatus D, substantially as described and for the
purposes set forth.
Also of the shaft H, with one or more inlet spaces G, substantially as shown and 2
described.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and seal, this Third day of October, in the year of our Lord One
thousand eight hundred and seventy-seven.