IMPROVEMENTS IN THE CONSTRUCTION AND ARRANGEMPUT OF THE ALTER OF CORR AVENS ESPECIALLY PROVISIONAL SPECIFICATION
Year: 1873

page_text: LETTERS PATENT to John Marley, of Darlington, in the County of
Durham, Mining and Civil Engineer, and Robert Thompson, of
Langley Old Hall, near the City of Durham, in the said County,
Mining Engineer, for the Invention of "IMPROVEMENTS IN THE
CONSTRUCTION AND ARRANGEMPUT OF THE ALTER OF CORR AVENS
ESPECIALLY
PROVISIONAL SPECIFICATION left by the said John Marley and
Robert Thompson at the Office of the Commissioners of Patents,
with their Petition, on the 10th June 1873.
We, JOHN MARLEY, of Darlington, in the County of Durham, Mining
5 and Civil Engineer, and ROBERT THOMPSON, of Langley Old Hall, near
the City of Durham, in the said County, Mining Engineer, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN THE
CONSTRUCTION AND ARRANGEMENT OF THE FLUES OF COKE OVENS, ESPECIALLY

page_text: This Invention consists in the construction and arrangement of coke
oven flues so as to effectually consume and utilise the smoke fumes and
gases given off and generated in the burning and coking of coal.
The ordinary method of constructing coke ovens is to build one flue
either on the top or down the back thereof, and to pass the smoke fumes
through this flue direct to the chimney.
This Invention, which is applicable to all coke ovens irrespective of
the position of the flue, consists in forming a return combustion flue by
placing a division in the interior of the ordinary flue, so as to form a
double flue, having a communication at the end furthest from the
chimney for the purpose of allowing the smoke fumes and gases to pass
from one to the other as herein-after mentioned, or by the addition of a
return flue to the ordinary flue in any suitable manner. The smoke fumes
and gases are passed from the ovens to the further end of the block of
ovens instead of being passed direct to the chimney as at present. They are
then returned by the return flue either over, under, or at the side of the
first flue back to the chimney. The ovens are by preference built in
blocks on each side of the chimney so that the flames from each block
of ovens meet each other on their exit from the combustion flues at the
foot of the chimney. Suitable dampers are applied between each oven
and the first or main flue for the purpose of shutting off and excluding
the air during the operation of drawing and re-charging the coke ovens.
The employment of such dampers during the time of drawing and
re-charging being necessary for the complete consumption of the smoke
fumes and gases. By these means the smoke fumes and gases are
completely commingled, returned, and effectually consumed, and the
coke manufactured in ovens having flues constructed and arranged
according to this Invention will be greatly improved in appearance and
quality, and rendered of more commercial value than that manufactured
in ovens having the ordinary flues.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Marley and Robert Thompson in the Great
Seal Patent Office on the 10th December 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
MARLEY, of Darlington, in the County of Durham, Mining and Civil
Engineer, and ROBERT THOMPSON, of Langley Old Hall, near the City
of Durham, in the said County, Mining Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Tenth day of June, 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 us, the said John Marley and Robert Thompson, Her
special licence that we, the said John Marley and Robert Thompson,
our executors, administrators, and assigns, or such others as we, the
said John Marley and Robert Thompson,, 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 Invention for "IMPROVEMENTS IN THE CONSTRUCTION
AND ARRANGEMENT OF THE FLUES OF COKE OVENS, ESPECIALLY WITH REFERENCE TO
THE CONSUMPTION OF SMOKE FUMES AND GASES," upon the condition (amongst
others) that we, the said John Marley and Robert Thompson, our
executors or administrators, by an instrument in writing under our,
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.
or
NOW KNOW YE. that we, the said John Marley and Robert

page_text: Our said Invention consists in the construction and arrangement of
coke oven flues so as to effectually consume and utilise the smoke
fumes and gases given off and generated in the burning and coking of
coal.
The ordinary method of constructing coke ovens is to build one flue
either on the top or down the back thereof, and to pass the smoke fumes
through this flue direct to the chimney.
Our present Invention, which is applicable to all coke ovens irrespective
of the position of the flue, consists in forming a return combustion flue
by placing a division in the interior of the ordinary flue, so as to form a
double flue, having a communication at the end furthest from the chimney
for the purpose of allowing the smoke fumes and gases to pass from one
to the other as herein-after mentioned, or by the addition of a return
flue to the ordinary flue in any suitable manner. The smoke fumes and
gases are passed from the ovens to the furthest end of the block of ovens,
instead of being passed direct to the chimney as at present. They are
then returned by the return flue either over, under, or at the side of the
first flue back to the chimney. The ovens are by preference built in
blocks on each side of the chimney, so that the flames from each block
of ovens meet each other on their exit from the combustion flues at the
foot of the chimney. Suitable dampers are applied between each oven
and the first or main flue for the purpose of shutting off and excluding
the air during the operations of drawing and re-charging the coke ovens.
The employment of such dampers during the time of drawing and
re-charging being necessary for the complete consumption of the smoke
fumes and gases. By these means the smoke fumes and gases are
completely commingled, returned, and effectually consumed, and the
coke manufactured in ovens having flues constructed and arranged
according to our Invention will be greatly improved in appearance and
quality, and rendered of more commercial value than that manufactured
in ovens having the ordinary flues.
Having thus described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed, we would observe
in conclusion that what we consider novel and original, and there-
fore claim as constituting our said Invention is, the construction
and arrangement of the flues of coke ovens in the manner and for the

page_text: purposes herein-before set forth and described, or any mere modifications
thereof.
In witness whereof, we, the said John Marley and Robert Thompson,
have hereunto set our hands and seals, this Eighth day of
December, in the year of our Lord 1873.
Witness,
R. S. MORDAUNT VAUGHAN,
Patent Agent,
8, Houndgate,
Darlington.
(L.S.)
JOHN MARLEY.
ROBERT THOMPSON. (L.S.)