IMPROVE- MENTS IN GAS HEATING ApparaTUS
Year: 1873

page_text: LETTERS PATENT to François Alphonse Jacquet, of Boulevard
Magenta, 89, at Paris, Manufacturer, for the Invention of "IMPROVE-
MENTS IN GAS HEATING ApparaTUS.”
PROVISIONAL SPECIFICATION left by the said François Alphonse
Jacquet at the Office of the Commissioners of Patents, with his
Petition, on the 24th December 1873.
I, FRANÇOIS ALPHONSE JACQUET, of Boulevard Magenta, 89, at Paris,
Manufacturer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN GAS HEATING APPARATUS," to be as follows:-
"
This Invention relates to the construction and arrangement of stoves
for heating air by the combustion of gas, the air heated being entirely
separated from the products of combustion, and the light of the gas
flame being reflected so as to give the appearance of an open fire. For
this purpose I make the stove casing in the manner usually adopted for
giving the appearance of a fire, that is to say, open in front with a

page_text: concave sloping reflector having numerous bright coloured reflecting
ribs placed near the back part of the stove, and a series of gas jets
arranged behind a screen in the upper part of a stove front. By this
construction, which is well known, the light of the jets is reflected from
the bright ribs of the reflector giving the appearance of a fire, and to
this construction I apply the modifications which form the subject of my
Invention in the following manner :-In the lower part or pedestal of the
stove I provide an air chamber which is supplied with air by apertures in
its sides. From this chamber I form a passage for air behind the reflector
to a chamber in the upper part of the stove above the gas jets, from
which upper chamber there are perforated outlets for the heated air.
Above the flame of the gas jets which is projected horizontally back-
wards in the open part of the stove, under this upper air chamber,
there
is a horizontal deflecting plate, between which and the air chamber there
is a channel whereby the products of combustion are caused to return
towards the front of the stove, whence by channels passing through the
air chamber they are conveyed to an exit pipe connected to a chimney
or other discharge.
One arrangement of these channels consists of an annular chamber
which the products of combustion enter by an up-take pipe at the front :
of the stove, and whence they pass by the chimney pipe at the back, the
air rising through the middle of the annular chamber and issuing by
perforations above.
According to another arrangement of these channels the products of
combustion ascend into a chamber communicating with the flue pipe, a
and the air ascending from behind the reflector is made to pass by tubes
of flattened form through this chamber from back to front, issuing
through perforations in the front of the stove. Thus the products of com-
bustion of the gas are kept completely separated from the air which they
heat, while the arrangement of the channels by which they pass towards 3
the chimney affords a large amount of surface for heating the air brought
in contact with it.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said François Alphonse Jacquet in the Great Seal Patent
Office on the 17th June 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FRANÇOIS
5 ALPHONSE JACQUET, of Boulevard Magenta, 89, at Paris, Manufacturer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of December, in the
year of our Lord One thousand eight hundred and seventy-three, in the
O thirty-seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said François Alphonse Jacquet, Her special
license that I, the said François Alphonse Jacquet, my executors, admin-
istrators, and assigns, or such others as I, the said François Alphonse
Jacquet, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times there-
after 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 "IMPROVEMENTS IN GAS HEATING APPARATUS," upon the con-
dition (amongst others) that I, the said François Alphonse Jacquet,
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 YẺ, that I, the said François Alphonse Jacquet, 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 thereof, reference being had to the accom-
panying Sheet of Drawings and to the figures and letters marked
thereon, that is to say :—
This Invention relates to the construction and arrangement of stoves
for heating air by the combustion of gas, the air heated being entirely
separated from the products of combustion, and the light of the gas
flame being reflected so as to give the appearance of an open fire. For
this purpose I make the stove casing in the manner usually adapted for

page_text: giving the appearance of a fire, that is to say, open at front with a
concave sloping reflector having numerous bright coloured reflecting
ribs placed near the back part of the stove, and a series of gas jets
arranged behind a screen in the upper part of the stove front. By this
construction, which is well known, the light of the jets is reflected from t
the bright ribs of the reflector, giving tho appearance of a fire, and to
this construction I apply the modifications which form the subject of my
Invention in the following manner:-In the lower part or pedestal of the
stove I provide an air chamber which is supplied with air by apertures in
its sides. From this chamber I form a passage for air behind a reflector 1
to a chamber in the upper part of the stove above the gas jets, from
which upper chamber there are perforated outlets for the heated air.
Above the flame of the gas jots which is projected horizontally back-
wards in the open part of the stove, under this upper air chamber, there
is a horizontal deflecting plate between which and the air chamber there 1
is a channel whereby the products of combustion are caused to return
towards the front of the stove, whenco by channels passing through the
air chamber they are conveyed to an exit pipe connected to a chimney
or other discharge.
One arrangement of these channels consists of an annular chamber 2
which the products of combustion enter by an up-take pipe at the front
of the stove, and whence they pass by a chimney pipe at the back, the
air rising through the middle of the annular chamber and issuing by
perforations above.
According to another arrangement of these channels the products of 2
combustion ascend into a chamber communicating with the flue pipe,
and the air ascending from behind the reflector is made to pass by tubes
of flattened form through this chamber from back to front, issuing
through perforations in the front of the stove. Thus the products of
combustion of the gas are kept completely separated from the air which a
they heat, while the arrangement of the channels by which they pass
towards the chimney affords a large amount of surface for heating the.
air brought in contact with it.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a vertical section of one modification of a gas stove con- ‹
structed and arranged according to my Invention, and Fig. 2 is a scc-

page_text: number of jets play under a plate or diaphragm b. The products of
combustion pass between between this plate and c the bottom of the air
chamber by a pipo & into an annular chamber f, whence they issue by
the pipe to the chimney or other outlet. An air chamber his formed
in the pedestal of the stove, to which chamber air enters by lateral
openings and from which it ascends behind the reflector to an upper air
chamber formed above the plate c whenco it passes by the cavity j
which is encircled by the annular chamber ƒ and issues into the apart
ment by a perforated cover i.
..
i
The course of the products of combustion and also the course of the
air is indicated by the arrows.
It will be seen that the air is entirely separated from the products of
combustion while it has to pass in its course over a large surface exposed
to the heating action of those products.
Fig. 3 represents a vertical section, and Fig. 4 a front view of another
modification of a gas stove constructed and arranged according to my
Invention. In this case the products of combustion from the gas jets a
pass into a chamber formed above the plate or diaphragm b, issuing
from this chamber by the pipe g. The air entering the lower chamber /
by perforations in front thereof ascends behind the reflector and flows by
two flat tubes c and; through the chamber f towards the front of the
stove where it issues into the apartment through a perforated front i.
The course of the products of combustion and also of the air is
indicated by arrows, and it will be seen that according to this modi-
fication as well as that previously described, the air is kept completely
separate from the products of combustion, while large heating surface is
provided.
Having thus described the nature of my Invention, and in what
manner the same is to be performed, I claim in respect of gas stoves
having reflectors presenting the appearance of a fire,—
First. The construction and arrangement substantially as herein
described in reference to Figures 1 and 2, of completely separated
channels for the products of combustion, and for_the_heated_air, the
former being passed under and then annularly round the latter.
Second. The construction and arrangement substantially as herein
described in reference to Figs. 3 and 4, according to which the air is
ン

page_text: caused to flow in flat tubes through a chamber through which the
products of combustion pass.
In witness whereof, I, the said François Alphonse Jacquet, have
hereunto set my hand and seal, this Sixteenth day of June, in
the year of our Lord One thousand eight hundred and seventy- ||
four.
Witness,
·
ALBERT CAHEN,
32, Boulevard Magenta,
at Paris.
F. A. JACQUET. (L.s.)