IMPROVEMENTS IN GAS STOVES
Year: 1853

page_text: LETTERS PATENT to Alfred William Warder, of 1, Sydney Street,
Brompton, for the Invention of "IMPROVEMENTS IN GAS STOVES."
PROVISIONAL SPECIFICATION left by the said Alfred William
Warder at the Office of the Commissioners of Patents, with his
Petition, on the 26th July 1858.
I, ALFRED WILLIAM WARDER, of 1, Sydney Street, Brompton, do
hereby declare the nature of the said Invention for "IMPROVEMENTS
IN GAS STOVES" to be as follows:-
This Invention consists of forming a gas stove of earthenware or
other suitable material, and it is preferred to be of a cylindrical exterior
form. The interior chamber is divided into three compartments by
ineans of two partitions; the centre compartment is open from bottom
to top, by which the external air may pass from below upward, become
heated, and then pass into a room; the two other compartments are"
connected together at the upper part of the apparatus by tubular
passages. Gas is supplied to one of the compartments, and air is
allowed to flow in freely, which igniting, the heat and products pass
through into the third compartment, and away by a suitable passage.
nto a chimney or flue:

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Alfred William Warder in the Great Seal Patent
Office, on the 26th January 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
ALFRED WILLIAM WARDER, of 1, Sidney Street, Brompton, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-sixth day of July, in the year
of our Lord One thousand eight hundred and fifty-three, in the seven-
teenth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Alfred William Warder, Her special
licence that I, the said Alfred William Warder, my executors, adminis-
trators, and assigns, or such others as T, the said Alfred William
Warder, 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
"IMPROVEMENTS IN GAS STOVES," upon the condition (amongst others) that
I, the said Alfred William Warder, by an instrument in writing under
my hand and seal, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be per-
formed, and cause the same to be filed in the Great Scal Patent
Office within six calendar months next and inmediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Alfred William Warder, 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 (that is to say):
This Invention consists of forming a gas stove of earthenware or
other suitable material, and it is preferred to be of a cylindrical exterior
form. The interior chamber is divided into three compartments by
means of two partitious; the centre compartment is open from bottom
to top, by which the external air may pass from below upward, become

page_text: heated, and then pass into a room; the two other compartments are
connected together at the upper part of the apparatus by tubular
passages. Gas is supplied to one of the compartments, and air is
allowed to flow in freely, which igniting, the heat and products pass
through into the third compartment, and away by a suitable passage
into a chimney or flue.
Having thus stated the nature of the Invention, I will proceed to
describe the means pursued by me in carrying out the sauc.
My Invention consists in the construction of a gas stove in such a
manner as to apply with little loss the whole of the heat generated by
the combustion of gas to the warming the air of rooms, &c., while the
whole of the injurious products of the combustion are conveyed away
without chance of admixture with the warm air to be respired.
Further, I am enabled by the peculiar construction of my stove to
insure a supply of pure air from sources external to the room in which
the stove may be placed, and which becoming warmed by passing
through my stove is effectual for ventilation, as well as the diffusion
of heat.
The manner in which I carry out these improvements is as fol-
lows: First, I cause the gas to issue from a plate of porcelain,
earthenware, metal, or other suitable material perforated with minute
holes, and burn it as it issues from these holes in free contact with the
atmosphere, by which means I obtain perfect combustion, and raise
the temperature of the plate considerably. The products of the com-
bustion pass along with the heated air into a chamber surrounding a
tube or tubes through which pure air passes in such a manner that
the pure air passing through the tube or tubes is prevented from
mixing with the hot air and products of combustion by the interposi-
tion of the walls of the tube or tubes, the pure air passing direct
through the tube or tubes into the room having become warm in its
passage, while the hot air and products of combustion having parted
with the greatest portion of their heat while surrounding the tube or
tubes pass off by a chimney or flue in another form. The hot air and
products of combustion passing from the surface of the plate, as before
described, pass into a chamber communicating with another chamber

page_text: by a tube or set of tubes, so that the pure air passes between the two
chambers, and round the outside of the tube or tubes containing the
hot air and products of combustion, becoming warm in its passage,
while the hot air and products of combustion having parted with the
greatest portion of their heat pass away by a chimney or flue, as
before. I cause the pure air to pass in contact with the heated plate,
and then through the tube or tubes or around the tube or tubes, as
before described, and, finally, to issue into the room. It must be
distinctly understood that I do not confine myself to the use of any
particular kind of material for the construction of my stoves, nor
do I confine myself to any particular form of stove, but I use such
material and form as best carries out the object of my Invention.
I claim the construction of a gas stove in such a manner as to have
the products of combustion conveyed away by suitable channels,
while the heat is abstracted by the pure air passing in contact
with the walls of the said channels, as already described, and then
passes in this warmed state into the room or other apartment in which
the stove may be placed without the possibility of admixture with the
carbonic acid and other products of combustion.
In witness whereof, I, the said Alfred William Warder, have
hereunto set my hand and seal, this Twenty-fifth day of
January, in the year of our Lord One thousand eight hundred
and fifty-four
Witness.
S. CARPMAEL.
AP WM WARDER. (L.S.)

page_text: Expening in front of Stove guardeo..
by glass or tale.
B.Section of plate on which the gas
is burnt.
C. Tibes connecting the Two Chambars
D.Posterior Clumber
E.Fluc
F.Passage for air to pass between the
chanihers.
Thourrows show the course of the
products of Combustion.