AN IMPROVED MODE OF CONSUMING FUEL IN FURNACES FOR RAISING STEAM AND IN OTHER LIKE FURNACES
Year: 1874

page_text: LETTERS PATENT to Edward Brook, of Middlesbrough, in the County
of York, and Alfred Wilson, of Middlesbro', in the County of York,
for the Invention of "AN IMPROVED MODE OF CONSUMING FUEL IN
Sealed the 24th April 1874, and dated the 3rd February 1874.
PROVISIONAL SPECIFICATION left by the said Edward Brook and
: Alfred Wilson at the Office of the Commissioners of Patents, with
their Petition, on the 3rd February 1874.
We, EDWARD BROOK, of Middlesbrough, in the County of York, and
ALFRED WILSON, of Middlesbro', in the County of York, do hereby
declare the nature of the said Invention for "AN IMPROVED MODE OF
CONSUMING FUEL IN FURNACES FOR RAISING STEAM AND IN OTHER LIKE FURNACES,"
to be as follows:-
:
This Invention has for its object an improved mode of consuming fuel
for raising steam and other purposes, and relates to the heating of
generators for raising steam by the use of fuel on a solid hearth, such

page_text: fuel being supplied with air previously heated in suitable apparatus by
the waste products of combustion escaping by the flues.
We dispense with the use of a fire-grate and employ a solid hearth on
to which the fuel is allowed to descend from a hopper, or on to which it
is otherwise fed either in solid, liquid, or gaseous state.
We force a current of hot air through the fuel by means of a suitable
blowing machine, the air thus supplied being heated by a Siemen's
regenerator which is placed in the flue conveniently for the waste
products of combustion to pass through.
The regenerator consists of two or more chambers with reversing 1
valves in the ordinary manner; the air after passing through the
regenerator is conducted to the furnace to effect the combustion of the
fuel, but a portion of the heated air may be applied for any useful
purpose.
A system of pipes exposed to the waste gases may be substituted for 1
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward Brook and Alfred Wilson in the Great
Seal Patent Office on the 1st August 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, EDWARD
BROOK, of Middlesbrough, in the County of York, and ALFRED WILSON,
of Middlesbro', in the County of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third 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 successors,
give and grant unto us, the said Edward Brook and Alfred Wilson,
Her special license that we, the said Edward Brook and Alfred Wilson,
our executors, administrators, and assigns, or such others as we, the
said Edward Brook and Alfred Wilson, our executors, administrators,
and assigns, should at any time agree with, and no others, from time

page_text: 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 "AN IMPROVED MODE OF CONSUMING
FUEL IN FURNACES FOR RAISING STEAM AND IN OTHER LIKE FURNACES," upon the
condition (amongst others) that we, the said Edward Brook and Alfred
Wilson, our executors or administrators, by an instrument in writing
under our or their hands and seals, or under the hand and seal of one of
us or them, 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 Alfred Wilson, on behalf of the said
Edward Brook, and for myself, 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, and the Sheet of Drawings therein referred to (that is
to say):-
This Invention has for its object an improved mode of consuming fuel
for raising steam, and other purposes, and relates to the heating of
generators for raising steam by the use of fuel on a solid hearth, such
fuel being supplied with air previously heated in suitable apparatus by
the waste products of combustion escaping by the flues.
We dispense with the use of a fire-grate and employ a solid hearth on
to which the fuel is allowed to descend from a hopper, or on to which
it is otherwise fed either in a solid, liquid, or gaseous state.
We force a current of hot air through the fuel by means of a suitable
blowing machine, the air thus supplied being heated by a Siemen's
regencrator, which is placed in the flue conveniently for the waste
products of combustion to pass through.
The regenerator consists of two or more chambers with reversing
valves in the ordinary manner; the air after passing through the
regenerator is conducted to the furnace to effect the combustion of the
fuel, but a portion of the heated air may be applied to any
other useful
purpose.
:

page_text: i
A system of pipes exposed to the waste gases may be substituted for
the regenerators above mentioned.
Besides its application in furnaces for raising steam as above described
this mode of consuming fuel may be used in other like furnaces.
Such being the nature of our Invention we now proceed to describe
the manner of carrying the same into practical effect, reference being
had to the accompanying Sheet of Drawings, in which Fig. 1 is a
longitudinal vertical section shewing the application of our Invention to
a double flued Cornish boiler; Fig. 2 is a sectional plan; and Figs. 3
and 4 are transverse sections.
A is the boiler having a solid hearth B built in each flue; C, C', are
two air-tight chambers which form the regenerators; D, E, are the two
reversing valves which are both reversed at once by means of the
shaft H; F is the hopper through which the fuel is fed. The arrows
indicate the direction of the currents of air and waste gases.
It will be obvious that in lieu of the regenerators shewn a system of
heating pipes exposed to the current of waste gases may be employed
for heating the air.
]
1
In some cases a surplus of air beyond the precise quantity required
for the combustion of the fuel may be forced through the heating 2
apparatus and such surplus air may be employed for any useful purpose,
such as for heating the jackets of steam engine cylinders, drums for
drying yarn or cloth, rooms, and stoves, and for heating and drying
purposes generally.
Although we have illustrated our Invention as applied to a double- 2
flued horizontal boiler, its application to furnaces of other kinds will be
evident from the foregoing description without further explanation.
Having described our said Invention, and having explained the manner
of carrying the same into practical effect, wehereby declare that we do not
claim as of our Invention or the exclusive use of the several parts herein- 3
before described or referred to except when the same are used in and for
the purposes of our said 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 use or employment
for consuming fuel in furnaces of a solid hearth in conjunction with a 3

page_text: forced blast of air when such air is heated by means of the wasto gases,
substantially as hercin-before described.
In witness whereof, I, the said Alfred Wilson, have hereunto set
my hand and seal, this Thirtieth day of July, in the year of our
Lord One thousand eight hundred and seventy-four.
ALFRED WILSON. (L.S.)