IMPROVEMENTS IN THE ARRANGEMENTS FOR UTILIZING THE WASTE HEAT IN THE FLUES OF BOILER AND OTHER FURNACES
Year: 1873

page_text: LETTERS PATENT to John Martin Stanley, of Sheffield, in the County
of York, Engineer, for the Invention of "IMPROVEMENTS IN THE
ARRANGEMENTS FOR UTILIZING THE WASTE HEAT IN THE FLUES OF BOILER
AND OTHER FURNACES."
Sealed the 15th August 1873, and dated the 21st February 1873.
PROVISIONAL SPECIFICATION left by the said John Martin Stanley
at the Office of the Commissioners of Patents, with his Petition,
on the 21st February 1873.
I, JOHN MARTIN STANLEY, of Sheffield, in the County of York,
Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE ARRANGEMENTS FOR UTILIZING THE WASTE HEAT IN THE
FLUES OF BOILER AND OTHER FURNACES," to be as follows:-
.
The object of my present improvements is to economise fuel by
utilizing the waste heat passing through the flues or chambers connected
with boiler and other furnaces. This object is effected or attained by
circulating steam through tiers or coils of pipes or tubes placed in the
flues, passages, or chambers of or connected with boiler or other furnaces

page_text: through which the waste heat passes or usually escapes. These pipes or
tubes, which I call "heat conductors," may be of any desired or suitable
size or shape. They are placed or fixed in such a position that the heat
in passing or escaping from the furnace shall impinge upon their external
surface, and be to a great extent absorbed by them.
"
"
Attached to one end of these "heat conductors" is an inlet pipe or
chamber, which is also connected with or to the boiler or main steam
pipe for the admission of steam. To the other end of the said "heat
conductor is attached an outlet pipe or chamber, which is also con-
nected with or to the same boiler or steam pipe or to other boilers
working in connection therewith, so that when the boiler and furnace
are in operation the steam will circulate through the "heat conductors
and thence again into the boiler or steam pipe in a superheated state,
where it imparts its extra or surplus heat to the general body of steam.
By a similar and continuous circulation of the steam it is constantly
absorbing heat from the "heat conductors" and conveying and im-
parting its additional or surplus heat thus obtained to the general body
of steam, thus considerably increasing the temperature and power
thereof.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Martin Stanley in the Great Seal Patent
Office on the 21st August 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MARTIN STANLEY, of Sheffield, in the County of York, Engincer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-first day of February, 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 Martin Stanley, Her special
licence that I, the said John Martin Stanley, my executors, adminis-
trators, and assigns, or such others as I, the said John Martin Stanley,
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,

page_text: furnaces, through which flues, passages, or chambers the waste heat
passes or usually escapes. These pipes or tubes a, which I call "heat
conductors," as shewn in Figure Two, are the ordinary description of
wrought iron three-inch circular or cylindrical tubes, but they may be
of any desired or suitable size and shape. They are placed or fixed in
such a position that the heat in passing or escaping from the furnace
shall impinge upon their external surface, and be to a great extent
absorbed by them.
Attached to one end of the heat conductors a is an inlet pipe c, which
is also connected with or to any suitable or convenient part of the
boiler d, for the conveyance or admission of the heated steam therein.
To the other end of the heat conductors a is attached an outlet pipe e,
which is also connected with or to the same boiler d or to other boilers
connected therewith, so that when the boiler and furnace are in operation
the steam will circulate through the heat conductors a, and thence
again into the boiler in a superheated state, where it imparts its extra or
surplus heat to the general body of steam. By a similar and continuous
circulation of the steam it is constantly absorbing heat from the heat
conductors a, and conveying and imparting its additional or surplus heat
thus obtained to the general body of steam in the boiler, thus consider-
ably increasing the temperature and power thereof.
In some cases highly heated steam becomes so dry as to be injurious
when required for engine power to the packing and other parts or
adjuncts of the working machinery. In order to avoid such injury or
damage I so form or shape the end of the ingress pipe c that it discharges
its heated steam under the surface of the water in the boiler, as shewn
in the Drawing.
Under certain circumstances or conditions I have found that the
current of steam in the heat conductors becomes reversed, the steam
issuing by the pipe e and re-entering the boiler by the pipe c. I there-
fore submerge the extremities of both pipes.
Having thus fully explained and ascertained the nature of my said
Invention and the manner in which the same is to be performed, without
binding myself to the precise forms or the position of the heat conductors
as now illustrated, I claim as my Invention, and desire to secure by the
aforesaid in part recited Letters Patent, the method of utilizing the
waste heat in the flues or chambers of boiler and other furnaces by the

page_text: circulation of steam in tubes or pipes, substantially as and for the
purposes herein described and shewn in the Drawing.
In witness whereof, I, the said John Martin Stanley, have here-
unto set my hand and seal, this Sixteenth day of August, in
the year of our Lord One thousand eight hundred and seventy-
three.
JOHN MARTIN STANLEY. (L.S.)