IMPROVEMENTS IN STEAM BOILERS
Year: 1853

page_text: LETTERS PATENT to Edward Taylor Bellhouse, of the Eagle
Foundry, Manchester, in the County of Lancaster, Engineer, for
the Invention of "IMPROVEMENTS IN STEAM BOILERS."
PROVISIONAL SPECIFICATION left by the said Edward Taylor
Bellhouse at the Office of the Commissioners of Patents, with
his Petition, on the 13th May 1853.
I, EDWARD TAYLOR BELLHOUSE, of the Eagle Foundry, Manchester,
in the County of Lancaster, Engineer, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN STEAM BOILERS" to be as
follows:-
This Invention relates to the arrangement and construction of a
"twin" boiler, wherein two distinct generators are placed parallel to
each other, side by side, with a central tubular chamber between the
two, through which chamber the smoke and heated gases pass to the
chimney. According to one modification the two boilers are cylindrical
with internal furnaces, from which the smoke passes right through the
central flue of each boiler, and out at the back end into a main cross

page_text: flue connecting the two boiler flues. There the two gaseous currents
join, and the combined current then returns to the furnace end of the
boilers through the intermediate chamber of tubes. This chamber may
either be built up of brickwork or boiler, just as the boiler is fixed or
independent, and it is formed by leaving the two boilers wide enough
asunder to leave the required space between them, the top and bottoni
of the space being covered in by any suitable arrangement. Such
central chamber is filled up with a series of short transverse tubes
In this
forming cross waterway connections between the two boilers.
way the return current imparts its heat to an extended water tube
surface, and on the arrival of the current at the front end of the boiler
it diverges to one side, to the left for example, and passing through a
suitable cross flue beneath the boiler on that side. This conducts the
current into an external longitudinal flue surrounding a great portion
of the outer side and bottom of the boiler, and running back again to
the further end of the boiler. From this point the current enters
another bottom cross flue opening into a corresponding external lon-
gitudinal flue along the right-hand boiler, which flue finally opens
into the chimney flue at the furnace end. Or by another plan, where
the boiler is independent, the combined furnace current returns along
the central tube chamber, and then passes down beneath the front end
of one boiler, and proceeds to the chimney flue direct. The flue
arrangement and the direction of the currents may be variously
modified to take advantage of the essential feature of the central
chamber of tubes.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward Taylor Bellhouse in the Great Scal
Patent Office, on the 12th November 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I
EDWARD TAYLOR BELLHOUSE, of the Eagle Foundry, Manchester, in the
County of Lancaster, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of May, in the year

page_text: of our Lord One thousand eight hundred and fifty-three, in the 'six-
teenth year of Her reign, did, for Herself, Her heirs and successors;
give and grant unto me, the said Edward Taylor Bellhouse, Her special
license that I, the said Edward Taylor Bellhouse, my executors, admi-
nistrators, and assigns, or such others as I, the said Edward Taylor
Bellhouse, my executors, administrators, or 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 STEAM BOILERS," upon the condition (amongst others)
that I, the said Edward Taylor Bellhouse, by an instrument in writing
under my hand and seal, should particularly describe and ascertain
the nature of the said Invention, and in what manner the saine 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 Edward Taylor Bellhouse, do
hereby declare the nature of my said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement, reference being had to the
accompanying Drawings, and to the letters and figures marked thereon,
that is to say:
"
My said Invention relates to the arrangement and construction of
" twin steam boilers, wherein two distinct steam generators are
placed parallel to each other, side by side, with a central tubular
chamber between the two, through which chamber the smoke and
heated air pass to the chimney. According to one modification of my
Invention the two boilers are cylindrical, with internal furnaces, from
which the smoke passes right through the central flue of each boiler,
and out at the back end into a main cross flue connecting the two
boiler flues. Here the two gaseous currents join, and the combined
current then returns to the furnace end of the boilers through
the intermediate chamber of tubes. This chamber may either be
built up of brickwork or of boiler plate, just as the boiler is fixed

page_text: or independant, and it is formed by placing the two boilers wide
enough asunder to leave the required space between them, the top
and bottom of the space being covered in by any suitable arrange-
ment. Such central chamber is fitted up with a series of short
transverse tubes forming cross waterway connections between the two
boilers. In this way the return current imparts its heat to an
extended water tube surface, and on the arrival of the current at the
front end of the boiler it diverges to one side, to the left for example,
and passes through a suitable cross flue beneath the boiler on that
side. This conducts the current into an external longitudinal flue
surrounding a great portion of the outer side and bottom of the boiler,
and running back again to the further end of the boiler. From this
point the current enters another bottom cross flue opening into a corre-
sponding external longitudinal flue along the right-hand boiler, which
flue finally opens into the chimney flue at the furnace end. Or by
another plan, where the boiler, is independant, the combined furnace
current returns along the central tube chamber, and then passes down
beneath the front end of one boiler, and proceeds to the chimney flue
direct. The flue arrangement and the direction of the currents may be
variously modified to take advantage of the essential feature of
the central chainber of tubes. Figure 1, on my Sheet of Drawings
is a front end clevation of one arrangement of my "twin" boiler,
complete as erected in brickwork. Figure 2, is a transverse ver-
tical section of the boiler corresponding, the section being taken
through the two furnaces, the brickwork and flues, and the overhead
steam chest. Figure 3, is a vertical longitudinal section of the arrange-
ment through the intermediate chamber, the external flues, waterways,
and the steam chest; and Figure 4, is a horizontal section or sectional
plan through the centre of the combined arrangement. The two
boilers or generators A, are of the common cylindrical tubular class,
with internal furnaces and flues B, running right through them from
end to end. They are set in a brick foundation C, suitable flues being
formed in the inass of brickwork to answer for the special arrangement
of the combination. Each boiler is fixed separately through the usual
end furnace door D, and the gaseous products pass off' from each set of

page_text: furnace bars in the direction of the arrows, the two currents meeting
and forming into one in the main end traverse flue E, in the brick-
work. This combined current then turns again towards the front end
of the boiler, passing directly through the intermediate chamber of
tubes F, which chamber is formed on its two sides by the contiguous
surfaces of the boilers A, and on its top and bottom by an overhead
arch G, of brickwork and the mass of the brickwork base. The short.
tubes E, which cross the space between the two boilers are water
spaces, being open at each end into the respective boilers beneath the
water line therein: thus the heated current, being intercepted by this
array of tubular water spaces as it traverses the intermediate chamber,
imparts its heat to an extended heating area. In my Drawings I have
represented these tubes as disposed in two rows, sloping at reverse
angles from one boiler to the other to aid the internal circulation and
the passing away of the steam. This central thoroughfare F, then
conveys the current of heat and gaseous products to the front end of
the boiler where it liverges as at I, descending into a short transverse
flue J, passing beneath the generator on that side. This conveys the
current into the external longitudinal flue K, surrounding and covering
in a great portion of the outer side and bottom of the generator, and
this flue K, then forms the duct for the traverse of the current a second
time to the far end of the boiler. Having reached this part, the
current next enters another bottom transverse fluc L, beneath the back
end of the intermediate chamber or call F, and through this short flue
the current enters the external longitudinal flue M, of the opposite
generator, and precisely similar to the before-mentioned external
flue K. In this way this latter generator is well heated externally like
the former one, and as the fluc runs all the way back to the furnace
end of the boiler the current finally passes off along it, and through
the short branch N, to the chimney. With a boiler so contrived the
whole of the large fluc area in the centre of the boiler is well exposed
to the direct heat of the furnaces, and the greatest possible portion of
the external boiler surface is similarly acted upon and heated after the
current leaves the central passage, whilst the possession of this central

page_text: passage adimits of the perfect commingling of the gaseous products of
combustion, and the obtainment of a greatly increased heating area'
from 'the arrangement of the pipes therein. The two generators thus
equally and uniformly heated furnish each its own supply of steam
through the overhead vertical pipes O, to the horizontal steam chest P.;
Any number of such generators may of course be combined together;
securing all the advantages of an intermediate flue cell between each.
Figure 1," on Sheet 2, of my Drawings represents a front elevation of
a pair of twin boilers, wherein the flues are composed of boiler plate
instead of brickwork. Figure 2, is a longitudinal section beteeen the
two. Figure 8, is a transverse section of the same; and Figure 4,.is a
horizontal section. In this arrangement the boilers are supported on
cast iron standards Q, Q, which rest upon tho brick foundations R, R.
Plié árrangement of these boilers remains nearly the same as that shown
in Sheet 1; of my Drawings, the same letters of reference indicating
the corresponding parts on the two sheets.
.
Having now described and particularly ascertained the nature of my
said Invention, and the manner in which the same is or may be used
or carried into effect, I would observe, in conclusion, that I do not
confine or restrict myself to the precise details or arrangements which
I have had occasion to describe or refer to, as many variations may be
made therefrom without deviating from the principles or main featurés
mny Invention; but what I consider to be novel and original, and
therefrom claim as the Invention secured to me by the herein-before in
part recited Letters Patent, is,―
First, the general arrangement and construction of steam boilers or.
generators, as herein-before described.
.
Second, the system or mode of constructing and arranging steam
boilers with intermediate flue chambers or cells, as herein-before
described.
Third, the application and use in steam boilers of a longitudinal
intermediate flue chamber for commingling two or more gaseous
currents, and applying the same to heat the boiler, as hercin-before
described.

page_text: Fourth, the system or mode of combining two steam generators
with an intermediate cell for the passage of the heated current, as
herein-before described.
Fifth, the application and use of an intermediate cell or flue
chamber forming the return flue for the furnace current between two
boilers.
In witness whereof, I, the said Edward Taylor Bellhouse, have
hereunto set my hand and seal, the Fifth day of November,
One thousand eight hundred and fifty-three.
EDW T. BELLHOUSE. (L.S.)
EDW T. BELLHOUSE. (L.S.)