IMPROVED APPARATUS FOR PREVENTING DOWNWARD DRAUGHT IN CHIMNIES, AND FOR FACILITATING THE EGRESS OF SMOKE THEREFROM.
Year: 1872

page_text: LETTERS PATENT to Richard Brown, of Ryde, Isle of Wight, in the
County of Southampton, Doctor of Medicine, for the Invention of
"IMPROVED APPARATUS FOR PREVENTING DOWNWARD DRAUGHT IN CHIMNIES,
AND FOR FACILITATING THE EGRESS OF SMOKE THEREFROM.
"
Sealed the 18th March 1873, and dated the 31st October 1872.
PROVISIONAL SPECIFICATION left by the said Richard Brown at the
Office of the Commissioners of Patents, with his Petition, on the
31st October 1872.
I, RICHARD BROWN, of Ryde, Isle of Wight, in the County of
Southampton, Doctor of Medicine, do hereby declare the nature of the
said Invention for "IMPROVED APPARATUS FOR PREVENTING DOWNWARD DRAUGHT
IN CHIMNIES, AND FOR FACILITATING THE EGRESS OF SMOKE THEREFROM," to be as
follows:-
This Invention relates to the construction of an apparatus whereby
the downward draught in chimnies is prevented, and the egress of smoke
therefrom greatly facilitated, the result of the use of such apparatus
being that the room or apartment in which the fire-place in connection

page_text: with the chimney to which the apparatus is applied is freed from the
annoyance consequent upon an insufficient draught to carry off the
products of combustion.
The apparatus consists essentially of three several parts, that is to
say, a cylinder, a stage, and a number of vertical segmental side pieces,
but all of which parts are in connection with each other.
The apparatus may be constructed wholly of metal, or of any other.
suitable material or combination of materials, as will be well understood,
and is capable of being placed in connection with an ordinary chimney
pot, or on the summit of a chimney on which a pot is not used. The
lower and longer part of the cylinder is passed into the chimney pot
or chimney, and is supported by the stage, which is attached to the
cylinder, and operates as a flange or collar thereto for its support on
the chimney pot or top. Upon the stage are fixed in a vertical position
any desired number of segmental side picces possessing a curved section,
the convex surfaces of which are placed inwards, and the concave
surfaces placed outwards, spaces being left between the several vertical
segmental side pieces. The latter are strengthened and held together
when necessary by means of wires or bands which connect the several
pieces. No cowl or cap is required to be placed at the top of this
apparatus, by which the down draught is prevented or reduced to a
minimum by reason of the spaces between the vertical side picces
affording egress to the wind before it can affect the smoke issuing from
the chimney, such egress of the wind at the same time greatly facili-
tating the upward current of smoke, the expulsion of which is still
further assisted by the convex form of the internal surfaces of the
vertical side pieces, the concave external surfaces of which collect the
wind to a considerable extent, and divert it from entering within
the upward draught of the chimney or interfering with the smoke
issuing therefrom.
The efficacy of the apparatus is greatly increased by and to a great
extent depends upon the areas of the cylinder and the spaces between
such of the vertical segmental side pieces as are exposed at any one
time to the influence of the wind being equal or nearly equal to cach
other, and thus affording free egress to the smoke.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Richard Brown in the Great Seal Patent Office
on the 29th April 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
BROWN, of Ryde, Isle of Wight, in the County of Southampton, Doctor
of Medicine, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirty-first day of October, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Richard Brown, Her special licence that
I, the said Richard Brown, my excutors, administrators, and assigns, or
such others as I, the said Richard Brown, my executors, administrators,
and assigns, should at any time agree with, and no others, from time
to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVED APPARATUS FOR PREVENTING
DOWNWARD DRAUGHT IN CHIMNIES, AND FOR FACILITATING THE EGRESS OF SMOKE
THEREFROM,” upon the condition (amongst others) that I, the said Richard
Brown, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Richard Brown, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement, that is to say :—
My said Invention consists in the construction of an apparatus
whereby the downward draught in chimnies is prevented, and the egress
of smoke therefrom greatly facilitated, the result of the use of such
apparatus being that the room or apartment in which the fire place in
connection with the chimney to which the apparatus is applied is freed
from the annoyance consequent upon an insufficient draught to carry off
the products of combustion.

page_text: The apparatus consists essentially of three several parts, that is to say,
a cylinder or shaft, a transverse stage, and a number of vertical seg-
mental side pieces, but all of which parts are in connection with each
other.
The apparatus may be constructed wholly of metal, or of any other
material or combination of materials as will be well understood, and is
capable of being placed in connection with an ordinary chimney pot, or
on the summit of a chimney on which a pot is not used. The lower and
larger portion of the cylinder or shaft is passed into the chimney pot
or chimney, and is supported by the transverse stage which is attached
to the cylinder or shaft, and operates as a flange or collar thereto for its
support on the chimney pot or top. In cases in which the apparatus is
applied to chimnies not provided with pots the lower end of the
cylinder or shaft may if desired be formed with a flange thereon by
which the apparatus may be secured by bedding the flange in brickwork
or otherwise. Upon the transverse stage are fixed in a vertical position
any desired number of segmental side pieces possessing a curved section
the convex surfaces of which are placed inwards, and the concave
surfaces placed outwards, spaces being left between the several vertical
segmental side pieces. The latter are strengthened and held together
when necessary by means of wires or bands or other suitable con-
trivances which connect the several pieces, and retain them firmly in
position. No cowl or cap is required to be placed at the top of the
apparatus. The down draught is prevented or reduced to a minimum
by the use of the said apparatus] by reason of the spaces between the
vertical segmental pieces affording egress to the wind before it can affect
the smoke which issues from the chimney, such egress of the wind at the
same time greatly facilitating the upward current of smoke, the expulsion
of which is still further assisted by the convex form of the internal
surfaces of the vertical segmental pieces, the concave external surfaces
of which collect the wind, and to a considerable extent divert it from
entering within the upward draught of the chimney, or interfering with
the smoke which issues therefrom.
The efficacy of the apparatus is greatly increased by, and to a great
extent depends upon the areas of the cylinder, and the spaces between
such of the vertical segmental pieces as are exposed at any one time to
the influence of the wind, being equal or nearly equal to each other, and
thus affording free egress to the smoke.

page_text: Having thus declared and ascertained the nature of my said Invention,
and in what manner the same is to be performed, I would observe in
conclusion that what I consider novel and original, and therefore claim
as constituting the Invention secured to me by the said hercin-before in
part recited Letters Patent is, the combination and arrangement of parts
of which the said apparatus is formed, substantially as and for the
purposes herein-before described and set forth, or any mere modifications
thereof.
In witness whereof, I, the said Richard Brown, have hercunto set
my hand and seal, this Twenty-fifth day of April, in the year of
our Lord One thousand eight hundred and seventy-three.