Improvements in and relating to Water Tube Boilers.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Water Tube Boilers.
We, JOHN HENRY TOULMIN, THOMAS COULTHARD, the Younger, and WILLIAM
NORRIS, all of Cooper Road, Preston, in the County of Lancaster, Engineers, do
hereby declare the nature of this invention to be as follows:-
Our invention relates to water tube boilers of the type wherein circular or
annular chambers are employed respectively for the steam and water drum and
steam driers and in which the connection is made from one to the other by a
circular series or battery of tubes, and is designed for the purpose of use in ship
propulsion and on vehicles, and also with slight incidental alterations for
general purposes; and has for its object to provide a neat and compact design
for economic production, and in which convenient means are provided for the
drying and superheating of the steam and that permits of liquid fuel being
used.
Our invention consists in the provision of the steam and water drum, as a
circular drum provided centrally with an upwardly projecting steam dome into
which a circular correspondingly shaped deflector is provided outwardly flaring
towards its bottom extremity so as to guide the steam on generation into the
dome there to be dried, the separated water falling upon the exterior of the
projecting deflector.
Our invention further consists in the provision of an annular drum superposed
above the steam and water drum, being connected to the steam and water drum
by a circular series of tubes, the flame and heated gases passing from under the
steam and water drum and through the interstitial spaces of the connecting
tubes, thence through the central aperture of the superheating drum to the
uptake. Our invention also consists in the adaption of the same means of steam
drying to water tube boilers where the steam and water drum is of longitudinal
form instead of being circular or annular, and comprises certain constructional
details hereinafter described as applied.
In carrying our invention into effect in the construction of a water tube boiler
we provide a lower annular drum of oblong section and preferably formed of a
single plate having its edges turned over so as to form two faces upon which a
bottom annular plate may be rivetted or otherwise secured, and we provide a
circular steam and water drum preferably made of one plate having its edges
inwardly diverted to form a circular face upon which the upwardly projecting
steam dome is provided, a circular series of tubes connecting the steam and water
drum and the lower annular drum. Within the steam and water drum a
deflecting tube is provided which projects within the dome and has its lower
extremity outwardly flaring so that the steam upon generation may be led into
the steam dome, and the separated water may fall down its exterior, and by its
high specific gravity pass down an outer series of tubes in the direction of the
lower annular drum. We provide within the upper steam and water drum a
circular series of flue tubes or ferrules in a vertical or transverse position so that

page_text: the flame and gases may find access therethrough to the upper part of the boiler
where an annular superheating drum is provided and disposed centrally around
the upwardly projecting steam dome, being connected to the flange of the dome
by means of a circular series of communicating tubes so that the steam may be
superheated prior to its being conducted to the motor. The annular superheating
drum is similarly formed to the lower annular water drum from one plate each
of whose edges is inwardly diverted to form faces upon which in this case au
upper circular plate may be rivetted. The whole series of drums are provided
in an outer casing which causes the gases to pass from the burner or grate dis-
posed centrally beneath the steam and water drum through the circular series
of tubes connecting it with the lower annular water drum through the circular
series of flue tubes or ferrules thence inwardly through the superheating tubes
and finally through the annular space between the projecting steam dome and the
annular superheating drum to the uptake or chimney.
The boiler may be fed with solid fuel or a vapouriser may be provided for
burning petroleum or other liquid fuel.
In carrying our invention into effect according to another modification we pro-
vide the lower annular water drum of two plates the upper plate being dished
or stamped to form the upper flat surface from which the connecting tubes
emanate while a circular bottom plate provided in which a circular recess is
formed having superposed thereupon a perforated circular plate through which
the feed water passes and is distributed uniformly into the drum. The upper
steam and water drum is provided having a central recess for the deflection of
the furnace gases, and is formed of two plates, the one being provided with the
upwardly projecting steam dome and forming the upper part of the steam and
water drum, while the other forms the lower part thereof, and is provided with
a circular flat surface where the tubes enter from the lower annular drum the
two parts being connected together by means of circular abutting flanges or
otherwise. Upon the upper part of the steam and water drum so formed a
circular series of tubes are provided serving to connect the steam and water
drum with a superposed annular superheating drum formed similarly and of the
same section as the lower annular water drum. In this case the lower plate
being dished and provided with inner and outer flanges upon which an upper
circular plate is rivetted, such plate being provided with a circular recess and
perforated cover plate from which the steam is taken. In this modification also
a deflector is employed of a tubular shape corresponding to the dome, and having
its outwardly flaring bottom edge so disposed as to lead the separated water into
an outer series of connecting tubes through to the lower annular water drum.
This constructional modification is likewise suitable for firing with solid fuel or
liquid fuel.
According to another structural modification in dispensing with the steam
drier we may provide the upper steam and water drum as an annular drum made
of plates dished or stamped of the same configuration with flat surfaces where
the tubes may be connected, and with flanges which may abut and be rivetted
together to form the drum; and in the central aperture we may provide a shoot
closed by a valve or distributing bell so that the boiler may be charged through
a charging door suitably provided, the valve distributing bell being capable of
regulation from without. In this modification it is at the same time admissible
for liquid fuel to be used, in which case the arrangement of central shoot is not
inconvenient.
In carrying our invention into effect according to another modification in which
a steam drier is applied to a longitudinal instead of an annular or circular drum,
where also we provide the longitudinal drum of suitable shape to correspond with
the position and direction of the connecting tubes from the lower mud or water
drums, we provide a central aperture through which the steam is led to a dome
or drier, a central projecting tube being employed and a bell or deflector mounted
thereupon so that the steam passes tortuously up the tube and down the bell

page_text: thence into the outer dome, passing through the steam outlet provided in the
upper part thereof. In this case the separated water is conducted by means of
exterior placed pipes to the lower water or mud drum. The steam pipe emanat-
ing from the steam and water drum is preferably provided with a flange to abut
against and be supported by a corresponding Hange provided upon the drum
and also a further flange upon which the outer dome is secured, the inner bell
being maintained in position by connection to the projecting tube or to the
surrounding dome.
1040
Dated UITIS
Top 10
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1000
sant ISLE
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents..
We, JOHN HENRY TOULMIN, THOMAS COULTHARD, the Younger, and WILLIAM
NORRIS, all of Cooper Road, Preston, in the County of Lancaster, Engineers, do
hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
This invention relates to water tube boilers of the type wherein circular or
annular chambers are employed respectively for the steam and water drum and
water drum, and in which the connection is made from one to the other by a
circular series or battery of tubes and is designed for the purpose of use in ship
propulsion and on vehicles, and also, with slight incidental alterations, for
general purposes; and has for its object to provide a neat and compact construction
for economic production, and in which convenient means are provided for the
drying and superheating of the steam and that permits of liquid fuel being
employed.
The invention consists in the provision of the steam and water drum as a
circular drum provided centrally with an upwardly projecting steam dome into
which a circular correspondingly shaped deflector is provided outwardly flaring
towards its bottom extremity so as to guide the steam on generation into the
dome, there to be dried, the separated water falling upon the exterior of the
projecting deflector.
The invention further consists in the provision of an annular drum superposed
above the steam and water drum being connected to the steam and water drum
by a circular series of tubes, the flame and heated gases passing from under the
steam and water drum and through the interstitial spaces of the connecting
tubes, thence through the central aperture of the superheating drum to the
uptake.
Our invention also consists in the adaptation of the same means of steam
drying and superheating to water tube boilers where the steam and water drum
is of longitudinal form instead of being circular or annular, and comprises certain
constructional details hereinafter described as applied.
Our invention is illustrated in the accompanying drawings in which
Figure 1 represents a sectional elevation of a boiler constructed according to
the present invention.

page_text: Figure 2 is a plan corresponding thereto and upon the line a b (Figure 1).
Figure 3 is a sectional elevation of a modification in construction, and,
Figure 4 is a sectional elevation of a further modification, while,
Figures 5 and 6 are respectively sectional elevation and side elevation of another
manner of carrying certain features of our invention into effect.
In carrying the invention into effect in the construction of a water tube boiler
as illustrated in Figures 1 and 2 of the accompanying drawings, we provide a
lower annular drum A of oblong section and preferably formed of a single plate a
having its edges a¹ turned over so as to form two faces upon which a bottom
annular plate a³ may be rivetted or otherwise secured; and we provide a circular
steam and water drum B preferably made of one plate having its edges in-
wardly diverted to form an upper circular face 61 upon which the upwardly pro-
jecting steam dome C is mounted a circular series of tubes D connecting the
steam and water drum B with the lower annular drum A. Within the steam
and water drum B a deflecting tube E is provided which projects within the
dome C and has its lower extremity E¹ outwardly flaring so that the steam upon
generation may be led into the steam dome C and the separated water may fall
down its exterior, and by its high specific gravity pass down the outer series of
tubes d in the direction of the lower annular drum A. We may provide within
the upper steam and water drum B a circular series of flue tubes or ferrules F
in a vertical or transverse position so that the flame and gases may find access
therethrough to the upper part of the boiler where a drying or superheating
annular drum G is provided and disposed centrally around the upper projecting
steam dome C, being connected to the flange of the dome C by means of a
circular series of communicating tubes H so that the steam may be dried or
superheated prior to its being conducted to the motor. The annular drying or
superheating drum G is similarly formed to the lower annular water drum A
from one plate g each of whose edges g¹ is inwardly diverted to form upper faces
upon which in this case an upper circular plate a³ may be rivetted. By the
formation of the lower annular drum and the upper drying or superheating drum
the joints are not situated in the line of the flames while in the formation of the
steam and water drum in the manner herein before described the joints are
situated out of the way of the flames.
The whole series of drums are provided in an outer casing I which so envelopes
them that the gases pass from the burner or grate disposed centrally beneath the
steam and water drum, through the circular series of tubes ]) thence through the
flue tubes or ferrules F and then inwardly between the drying or superheating
tubes H and finally through the annular space between the projecting steam
dome C and the annular superheating drum G to the uptake or chimney J as
indicated by the arrows.
The boiler may be fed with solid fuel or a vapouriser may be provided for
burning petroleum or other liquid fuel.
In carrying the invention into effect according to another modification illus-
trated in Figure 3 of the accompanying drawings we provide the lower annular
water drum A¹ of two plates, the upper plate at being dished or stamped to form
the upper flat surface from which the connecting tubes D emanate while a circular
bottom plate as is provided in which a circular recess aº is formed having super-
posed thereupon a perforated circular plate a through which the feed water passes
and is distributed uniformly into the drum A'. The upper steam and water
drum B¹ may be provided with a central recess 62 for the deflection of the flames
and gases and is formed of two plates 636 the one being centrally provided
with the upwardly projecting steam dome C₁ and forming the upper part of the
steam and water drum while the other 63 forms the lower part thereof and is
provided with a circular flat surface where the tubes D enter from the lower
annular drum A¹ the two parts 64 and 63 being connected together by means of
circular abutting flanges or otherwise. Upon the upper part 4 of the steam and
water drum B a circular series of vertical tubes H are provided serving to con-

page_text: nect the steam and water drum with a superposed annular drying or superheating
drum G formed similarly and of the same section as the lower annular water
drum A'. In this case the lower plate is dished and provided with inner and
outer flanges upon which an upper circular plate is rivetted, or bolted such
plate being provided with a circular recess and a perforated cover plate 97
from which the steam is taken. In this modification also a deflector E2 is em-
ployed of a tubular shape corresponding to the dome C and having its outwardly
flaring bottom edge E so disposed as to lead the separated water which deposits
upon its exterior surface into an outer series of connecting tubes & through to the
lower annular water drum. This constructional modification is likewise suitable
for firing with solid fuel or liquid fuel. In this modification also the connected
drums are enclosed in exterior casing I which may be lined with fire brick.
According to another structural modification as illustrated in Figure 4 in dis-
pensing with the steam drier or deflector E we may provide the upper steam and
water drum 131 as an annular drum made of plates 56 dished or stamped of the
same shape with flat surfaces 67 68 where the tubes may be connected and with
interior and exterior flanges which may abut and be rivetted or bolted together
to from the drum and in the central aperture thereof we may provide a shoot K
closed by a valve or distributing bell L so that the boiler may be charged through
a charging door L¹ suitably provided, the valve or distributing bell being capable
of regulation from without. In this modification also it is at the same time admis-
sible for liquid fuel to be used in which case the arrangement of a central shoot
such as K would not be inconvenient. In this case also an upper superheating
drier such as G¹ may be provided.
In carrying the invention into effect according to another modification as
illustrated in Figures 5 and 6 in which a steam drier is applied to a longitudinal
instead of an annular or circular drum where also we provide the longitudinal
drum of suitable shape to correspond with the position and direction of the con-
necting tubes from the lower mud or water drums employed, we provide a central
tube or aperture M through which the steam is led to a dome or drier N, the
central tube projecting within a bell or deflector O which may be mounted upon
the extremity of the tube so that thereby the steam passes tortuously up the
tube M and down the hell O thence into the upper dome whence it passes to the
outlet P provided in the upper part thereof. In this case the separated water is
conducted by means of exterior pipes Q to the lower water or mud drums R.
The steam pipe M emanating from the steam and water drum S is preferably
provided with a flange m to abut against and be supported by a corresponding
flanges provided upon the drum S and the tube M is further provided with a
flange m upon which the outer dome N is mounted and secured, the inner bell O
being maintained in position by connection to the projecting tube M as illustrated
or to the surrounding dome. In this case also the connected drums and drier
are enclosed within a casing I which may or may not be lined with fire brick or
other suitable heat non-conducting material.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is:-
1. A water tube boiler substantially as described.
2. In water tube boilers of the type herein before specified the provision of a
circular steam and water drum having an upwardly projecting steam dome within
which a correspondingly shaped and outwardly flaring deflector is provided which
guides the steam on generation into the dome and guides the separated water
towards the outer part of the steam drum for the purpose and substantially as
described.
3. In water tube boilers of the type hereinbefore specified the provision of an
annular steam drying or superheating drum superposed above the steam and

page_text: water drum and connected thereto by a series of tubes for the purpose and sub-
stantially as described.
4. In water tube boilers of the type herein before specified the provision of an
annular steam drying or superheating drum superposed above the steam and
water drum and connected thereto by a series of tubes and an upwardly projecting
steam dome on the steam and water drum, forming with the annular superheating
drum an annular space through which the gases pass to the uptake for the pur-
pose and substantially as described.
5. In water tube boilers of the type herein before specified the provision of a
fuel shoot within the central aperture of the steam and water drum substantially
as and for the purpose hereinbefore described and as illustrated in Figure 4 of
the accompanying drawings.
6. A water tube boiler constructed and arranged substantially as and for the
purpose herein before described and with reference to Figures 1 and 2 of the
accompanying drawings.
7. A water tube boiler constructed and arranged substantially as and for the
purpose hereinbefore described and with reference to Figure 3 of the accompany-
ing drawings.
8. A water tube boiler having the improvements hereinbefore described and
illustrated in Figures 5 and 6 of the accompanying drawings.
Dated this 28th day of October 1898
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.