IMPROVEMENTS IN FIRE-PLACES OR GRATES
Year: 1873

page_text: LETTERS PATENT to John Denley, of Cheltenham, in the County of
Gloucester, for the Invention of "IMPROVEMENTS IN FIRE-PLACES OR
GRATES."
Sealed the 23rd September 1873, and dated the 16th April 1873.
PROVISIONAL SPECIFICATION left by the said John Denley at the
Office of the Commissioners of Patents, with his Petition, on the
16th April 1873.
.
I, JOHN DENLEY, of Cheltenham, in the County of Gloucester, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
FIRE-PLACES OR GRATES;" to be as follows:-
My Invention relates to the construction of open fire-grates or stoves
with air chambers at the back and sides for a circulation of air through
the same to intercept the heat which would be otherwise absorbed by the
brickwork setting of the grate, and wasted.
According to my Invention I construct the grate with hollow sides
and back to form an air chamber, and the novelty consists in causing a
circulation of the air of the room in which the grate is placed through

page_text: the said air chamber by providing suitable openings at the upper and
lower parts of the grate, regulated by dampers or valves. The cooler
portion of the air being at the lowest part of the room enters or is drawn
through the openings at the lower part of the grate into the air chamber
in the back and sides thereof, in which it becomes rarefied, ascends and
passes out through a pipe leading to the opening at the upper part of
the grate into the room, a constant circulation of the air of the room
through the grate being thus maintained.
¡
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Denley in the Great Seal Patent Office on
the 16th October 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, John
DENLEY, of Cheltenham, in the County of Gloucester, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixteenth day of April, in the year of our
Lord One thousand eight hundred and seventy-three, in the thirty-sixth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said John Denley, Her special license that I, the
said John Denley, my executors, administrators, and assigns, or such
others as I, the said John Denley, 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 FIRE-PLACES OR GRATES,"
upon the condition (amongst others) that I, the said John Denley, 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 John Denley, do hereby declare the
nature of my said' Invention, and in what manner the same is to be

page_text: performed, to be particularly described and ascertained in and by the
following statement, reference being had to the Sheet of Drawings here-
unto annexed and to the letters and figures marked thereon (that is to
say) :—
My Invention relates to the construction of open fire-grates. or stoves
with air chambers at the back and sides for a circulation of air through
the same to intercept the heat which would otherwise be absorbed by
the brickwork setting of the grate, and thus be wasted. For this purpose
apertures are provided at the upper and lower parts of the grate fitted
O with dampers or valves to regulate the passage of the air which enters
at the lower part of the air chamber, and becoming rarefied rises therein
and passes out through pipes leading to openings at the upper part
of the grate, or it may be conveyed through a pipe or pipes to one or
more apartments above or adioining.

page_text: .
air will be maintained in the apartment in which the stove is placed, the
heated air passing out from the air chamber through openings E ascend-
ing to the ceiling of the apartment, and being gradually driven down
again by the stream of newly warmed air which follows, so that the air
in the room is continually changed, and acquires a nearly equal tempera-
ture at all parts of the room.
Having described the nature of my Invention and the manner in
which the same is to be performed, I declare that what I claim as my
Invention to be protected by the herein-before in part recited Letters
Patent is, providing fire-grates with an air chamber B partly projecting
into the fire-basket, and fitted with pipes and openings, all constructed
substantially as herein shown and described for the purpose specified.
In witness whereof, I, the said John Denley, have hereunto set my
hand and seal, this Thirteenth day of October, in the year of our
Lord One thousand eight hundred and seventy-three.
.