IMPROVED APPARATUS FOR INCREASING DRAUGHT IN AND PREVENTING OR CURING SMOKY CHIMNEYS AND ECONOMISING HEAT
Year: 1865

page_text: LETTERS PATENT to William Edward Gedge, of the Firm of John Gedge
"
and Son, of No. 23, Southampton Buildings, Chancery Lane, in the
County of Middlesex, Patent Agent, for the Invention of
IMPROVED APPARATUS FOR INCREASING DRAUGHT IN AND PREVENTING OR
CURING SMOKY CHIMNEYS AND ECONOMISING HEAT."-A communication
from abroad by François Perrachon, of No. 39, Faubourg St. Martin,
Paris, France.
Sealed the 24th April 1866, and dated the 2nd November 1865.
PROVISIONAL SPECIFICATION left by the said William Edward Gedge
at the Office of the Commissioners of Patents, with his Petition, on the
2nd November 1865.
I, WILLIAM EDWARD GEDGE, of the Firm of John Gedge and Son, of
No. 23, Southampton Buildings, Chancery Lane, in the County of Mid-
dlesex, Patent Agent, do hereby declare the nature of the said Invention
for "AN IMPROVED APPARATUS FOR INCREASING DRAUGHT IN AND PREVENTING OR
CURING SMOKY CHIMNEYS AND ECONOMISING HEAT," (a communication to me
from abroad by François Perrachon, of No. 39, Faubourg St. Martin,
Paris, France,) to be as follows:-
This Invention consists in an apparatus which placed in a defective
chimney renders it at once an excellent one, and not only does it prevent the
[Price 8d.1

page_text: smoke entering the apartment even under the influence of exterior causes,
such as currents of air or high winds, but further causes the smoke to
give out its heat to the benefit of the rooms to be warmed, and thus effects
a saving of fuel. The apparatus the subject of this Invention is illustrated
on the accompanying Sheet of Drawing forming part of this Provisional
Specification; Figure 1 representing a section of Figure 2 following the
line X, Y; Figure 2, a top view of apparatus in the chimney; Figure 3, a
front view; and Figure 4 a section of Figure 2 following the line Z, Z.
The bottom plate of the apparatus carries small perpendicular plates
a, a, a, a, a, a, a, the object of which is to form isolated currents of air
which are, the more active inasmuch that they do not interfere with each
other, and that the quantity of air is more considerable at the bottom than
at the top, this being caused by the difference of the plates a, which
project one-third more at the bottom than at the top. The horizontal
plates b, b, b, b, b, give passage to the air which comes from the apartment
into the chimney, and which in passing over the grate drives the smoke
towards the bottom plate, where it is drawn by the air which passes in
the grooves of this plate. The moveable grate gives passage by the open
gallery c, c, to the air, which precipitates itself in the grooves and hastens
the escape of the smoke into the flue of the chimney A. The small
moveable frame or register d, e, g, h, composed of three parallel plates
m, m, m, placed at the entrance of the flue, lowers at will on to the
trapeziform hood n, o, p, q, aud breaks the currents of air which are often
driven down chimneys by strong winds. The inclination of the trapezi-
form hood forming an angle of 70 degrees is so calculated that the smoke
which strikes its sides is forced to rise instead of redescending in whirl-
winds into the apartment. The moveable register is worked by a small
iron rod within reach of the hand. The open work at bottom of B
and B gives passage to a quantity of air which enters two warm chambers
left behind the jambs. The air in circulating round the apparatus is soon
heated, and enters the apartment by two openings placed right and left of
the chimney. Every part of the apparatus being in contact with the
caloric and the smoke preserves a quantity of heat, which concentrates in
the fire-place and is sent from thence into the apartment, an important
saving of heat being thus produced. In case of insufficiency of air in the
apartment, the exterior air can be conducted in front of the fire-place by
a pipe closed at will by a valve.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Edward Gedge in the Great Seal Patent Office
on the 28th April 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
EDWARD GEDGE, of the Firm of Johu Gedge and Son, of No. 23, South-
ampton Buildings, Chaucery Lane, in the County of Middlesex, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of November, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-ninth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said William Edward Gedge, Her special licence that I, the said
William Edward Gedge, my executors, administrators, and assigns, or such
others as I, the said William Edward Gedge, 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 "AN IMPROVED APPARATUS FOR INCREASING DRAUGHT IN
AND PREVENTING OR CURING SMOKY CHIMNEYS AND ECONOMISING HRAT," a
communication to me from abroad by François Perrachon, of No. 39,
Faubourg St. Martin, Paris, France, upon the condition (amongst others)
that I, the said William Edward Gedge, 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 William Edward Gedge, do hereby
declare the nature of the said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by
the following statement, reference being had to the Sheet of Drawings
hereunto annexed, and to the letters and figures marked thereon (that is
to say):
:-
This Invention relates to apparatus for producing a draught in chimneys
and preventing smoke issuing into the apartment in which the stove or
other fire-place is disposed. The apparatus which is arranged to act

page_text: either at the bottom or at the top of the chimney, or in both positions
simultaneously, consists of thin plates inclined at suitable angles for
directing the air on entering the chimney and also the combustible gases
in order to effect their escape into the atmosphere. Figure of the
annexed Drawing represents a horizontal section of the lower part of a
chimney or fire-place on line 1, 2, Figure 2, furnished with the apparatus
according to this Invention; Figure 2. a vertical section of same on line
3, 4, Figure 1; while Figure 3 represents a vertical section of the apparatus
to be placed at the chimney top. The air from the room enters under
the stove A, while fresh air may also be introduced by means of a channel
B having a regulating valve b; the air becomes heated by passing
through the metal tubes C, C, in any suitable number. The ascensional
force of the air being augmented by the action of the heat, and in its
upward passage through the stove by contact with the heated metal plates
D, D, creates an energetic draught at the bottom of the chimney. The
apparatus comprises a metal chamber E surrounding the stove, the air
from the apartment being introduced at the sides of such heated chamber
through bars or gratings G of a more or less ornamental form made in the
hollow front at the sides of the stove, which air absorbs the heat from the
surfaces and conveys it back into the apartment at openings H (one on
either side). The apparatus to be placed in the chimney top may be of a
round or polygonal form, and consists of a series of inclined plates 1, I, or
tubes J, J, serving to direct in an upward direction any wind entering; a
diaphragm K is also added to prevent the smoke being driven downwards
during high winds; the direction of the different currents are shown by
the arrows in the several Figures, and will be readily understood without
further description.
The advantages resulting from the Invention herein specified are the
increased draught obtained by heating the air at the bottom of the
chimney, as also the direction thereof in the manner described, and
further causing external currents of air to take such effect as to conduce
to the escape of the smoke, all as herein-before described.
In witness whereof, I, the said William Edward Gedge, have hereunto
set my hand and seal, this Twenty-eighth day of April, in the year
of our Lord One thousand eight hundred and sixty-six.
W. E. GEDGE. (L.S.)