IMPROVEMENTS IN FURNACE DOORS
Year: 1874

page_text: LETTERS PATENT to Henry Cockey and Francis Christopher Cockey,
both of Frome Selwood, in the County of Somerset, for the
Invention of "IMPROVEMENTS IN FURNACE DOORS."
Sealed the 14th August 1874, and dated the 19th February 1874.
PROVISIONAL SPECIFICATION left by the said Henry Cockey and
Francis Christopher Cockey at the Office of the Commissioners of
Patents, with their Petition, on the 19th February 1874.
We, HENRY COCKEY and FRANCIS CHRISTOPHER COCKEY, both of
Frome Selwood, in the County of Somerset, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN FURNACE DOORS," to
be as follows:-
In order to prevent the intense heat of furnaces having an unduly
prejudicial effect upon the furnace doors it has been usual to attach a
brick, tile, or slab of fire-clay to the interior thereof, but the mode of
attachment has hitherto been so imperfect as to lead to many objections
to the mode adopted, and it is the object of this Invention to remedy or
prevent the evils complained of, and with this view we construct the .
.
.

page_text: furnace door with a frame of cast or wrought iron, the inner edge of the
frame being bevelled, so that the smallest part of the opening is inside the
door. A brick, tile, or slab of fire-clay is moulded with a corresponding
bevel on its edge, so as to admit of its being inserted in the opening of
the furnace door and projecting somewhat beyond the interior surface
thereof.
In order to ensure more perfect contact between the brick and the
furnace door the brick is bedded in with "Sellar's cement," fire-clay, or
other suitable matter or cement. The upper or outer surface of the brick
is also served with the same sort of cement or fire-clay, and a cast or
wrought iron plate is then placed on it and secured to the frame of the
furnace door by bolts and nuts, or other suitable means.
By constructing the doors on this plan the liability to shatter the brick
and crack the furnace doors' is avoided, and the durability of the whole
considerably increased.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Henry Cockey and Francis Christopher Cockey
in the Great Seal Patent Office on the 19th August 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, HENRY
COCKEY and FRANCIS CHRISTOPHER Cockey, both of Frome Selwood,
in the County of Somerset, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Nineteenth day of February, in the
year of our Lord One thousand eight hundred and seventy-four, in the
thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said Henry Cockey and Francis
Christopher Cockey, Her special license that we, the said Henry
Cockey and Francis Christopher Cockey, our executors, administrators,
and assigns, or such others as we, the said Henry Cockey and Francis
Christopher Cockey, our 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

page_text: Invention for "IMPROVEMENTS IN FURNACE DOORS," upon the condition
(amongst others) that we, the said Henry Cockey and Francis Chris-
topher Cockey, our executors or administrators, by an instrument in
writing under our, cr one of our 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 we, the said Henry Cockey and Francis
Christopher Cockey, 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 accompanying Drawings and to the letters
and figures marked thereon, that is to say :-
-
In order to prevent the intense heat of furnaces having an unduly
prejudicial effect upon the furnace doors it has been usual to attach a
brick, tile, or slab of fire-clay to the interior thereof, but the mode of
attachment has hitherto been so imperfect as to lead to many objections
to the mode adopted, and it is the object of this Invention to remedy or
prevent the evils complained of, and with this view we construct the
furnace door with a frame of cast or wrought iron, the inner edge of the
frame being bevelled, so that the smallest part of the opening is inside
the door. A brick, tile, or slab of fire-clay is moulded with a corre-
sponding bevel on its edge, so as to admit of its being inserted in the
opening of the furnace door and projecting somewhat beyond the interior
surface thereof.
In order to ensure more perfect contact between the brick and the
furnace door the brick is bedded in with "Sellar's cement," firc-clay, or
other suitable matter or cement. The upper or outer surface of the
brick is also served with the same sort of cement or fire-clay, and a cast
or wrought iron plate is then placed on it and secured to the frame of
the furnace door by bolts and nuts or other suitable means.
By constructing the doors on this plan the liability to shatter the brick
and crack the furnace doors is avoided, and the durability of the whole

page_text: In order that the foregoing may be more easily understood Drawings
are attached hereto, of which the following is a description. Fig. 1 is an
elevation of the furnace door and frame, and Fig. 2 a vertical section of
the same, A being the furnace door, B the frame, and C the fire-clay
slab or tile with its covering plate D, which is secured to the door by
the bolts E, E.
Having now described and particularly set forth the nature of the said
Invention, and the manner in which the same is or may be used or
carried into effect, we would observe in conclusion that we do confine
or restrict ourselves to the precise details or arrangements which we
have described or referred to, as variations may be made therefrom
without deviating from the principles or mean features of this Invention,
but what we consider to be novel and original, and therefore claim
as the Invention secured to us by the herein-before in part recited
Letters Patent is, the construction of furnace doors in the manner
described and shown on the Drawings, so as to admit of the fire-clay,
tile, or slab being more securely attached thereto, and admit of the
same being removed for renewal.
In witness whereof, I, the said Henry Cockey, have hereunto set
my hand and seal, this Eighteenth day of August, in the year of
our Lord One thousand eight hundred and seventy-four.
HENRY COCKEY. (L.S.)