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

page_text: PROVIDIUNAL DIEVITICATION.
Improvements in and relating to Water Tube Boilers.
We, THOMAS COULTHARD, the younger, JOHN HENRY TOULMIN, and WILLIAM
NORRIS, all of Cooper Road, Preston, in the County of Lancashire, Engineers,
do hereby declare the nature of this invention to be as follows:-
Our invention relates to water tube boilers of the type wherein two annular
chambers are used respectively as the steam and water drum and has for its object
to render such a boiler applicable for the purpose of use in ship propulsion and
on vehicles and also with slight incidental alterations, for general purposes while
providing a neat and compact design economical of production and efficient for
its purpose and that preferably permits of liquid fuel being employed.
Our invention consists of a water tube boiler wherein the upper steam and
water annular drum and also the lower water annular drum are connected together
by means of a circular series of tubes through which upward passage of water is
permitted such drums being preferably provided of circular sectional shape and
from two plates which are stamped or pressed of semicircular section having
lateral flanges on either side to serve for the connection of one part to the other
each drum being of the same shape as the other so that thereby each half of
the two drums may be produced by the use of one die. The steam outlet connec-
tion is provided upon the upper steam and water drum so as to connect two
diametrically opposed outlet orifices communicating with a common outlet
arranged centrally upon the diametric outlet connection so that the steam may
pass to the engine irrespective of any angle at which the boiler may be placed
owing to the irregularity of the surface or sea over which the vehicle or vessel
may pass. The upper annular steam and water drum it will be understood is
provided with a central orifice through which the gases pass. Immediately above
the lower annular water drum a vaporiser is provided for the utilisation of liquid
fuel while the whole is enveloped in a casing, preferably jacketed with a non-
conductor, so that the gases are caused to pass out laterally from the burner
thence returning upwardly and in contact with the lower surface of the upper
steam and water drum passing through the central orifice provided therein to
the chimney. The central orifice of the lower annular water drum is preferably
provided with a regulator for the regulation of the air admitted for the purpose
of maintaining combustion. Any suitable kind of vaporiser may be employed
while likewise any description of regulator may be used that is effective for the
purpose. The tubes connecting the upper and lower drums are arranged in circu-
lar series and the internal series is preferably arranged with the tubes at a rela-
tively great distance apart for the purpose of securing a greater effective area
for the direct action of the gases while the outer series may be likewise arranged
with the tubes at a relatively great distance apart for the purpose of securing
a large area of surface for the radiation of heat from the outer casing which may
preferably be provided of a corrugated form and provided with an interior lining
of refractory material.

page_text: A door may be provided upon one side of the outer casing through which the
burner may be regulated and through which also oil may be introduced upon a
tray that may be employed for the purpose of initially heating the burner, the
series of tubes being interrupted in a position opposite to the door to permit of
this.
We may preferably provide the upper steam and water drum without a central
orifice in which case the two parts of that drum may be connected together
centrally by means of a bolt or rivet. In such case the flame and gases would
pass outwardly and around the exterior surface of the drum thence passing above
the drum through to the chimney centrally disposed, in the casing. We may,
however, provide a coil of piping above the steam and water drum through
which the steam may pass after passing through the transverse outlet connection
and thereby be superheated.
We may also provide the lower part of the upper steam and water drum and
the upper part of the lower water drum with flat bottom and top surfaces
respectively upon which the tubes may be secured so as thereby to obviate the
necessity of bending the tubes. Further the lower water drum may be provided
of semicircular form and constituted of a flat annular base plate upon which a
semicircular sectioned plate may be superposed and rivetted thereto. The feed
water may be introduced to the lower water drum by means of a circular channel
provided in the base plate which is covered by a perforated plate so that the
water is thereby uniformly distributed into the boiler with the effect of main-
taining the temperature of the water therein uniform.
Dated 25th day of January 1898.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
We, THOMAS COULTHARD, the younger, HENRY TOULMIN, 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 per-
formed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to water tube boilers of the type wherein two annular
chambers are used respectively as the steam and water drum, and has for its
object to render such a boiler applicable for the purpose of use in ships propul-
sion and on vehicles and also, with slight incidental alterations, for general
purposes, while providing a neat and compact construction economic of produc-
tion and efficient for its purpose and that preferably permits of liquid fuel being
employed.
The invention is illustrated in the accompanying drawings in which,
Figure 1 represents a vertical section of a boiler provided in accordance with
the present invention, while
Figure 2 is a plan corresponding thereto.
Figure 3 is a sectional elevation of a modification in which the invention is
carried into effect.
Figure 4 is a plan corresponding thereto.

page_text: boiler made in accordance with the present invention, while
Figure 6 is a plan corresponding thereto.
Figure 7 is a sectional elevation of another modification, and
Figure 8 is yet a further modification of a water tube boiler in which our
invention is carried into effect.
Figure 9 is a vertical section of a modification of the construction illustrated
in Figure 3, while
Figure 10 is a vertical section of a boiler similar in construction to that illus-
trated in Figure 3.
In carrying the invention into effect as illustrated in Figures 1 and 2 of the
accompanying drawings a water tube boiler is provided wherein the annular
steam and water drum A and also the lower mud and water annular drum B
are connected together by means of a circular series of tubes C through which
upward passage of water is permitted. The annular steam and water drum A
is provided of two parts a a¹ preferably of substantially circular shape, each
part being provided with inner and outer flanges as a³ which abut one against
the other, and for the purpose of securing the one part a to the other part a¹
by means of bolts.
The steam outlet connection D is provided upon the upper steam and water
drum A so as to connect two diametrically opposed outlet orifices d d communi-
cating with the common outlet D¹ so that the steam may pass to the engine and
the connection between the boiler and motor shall not be subjected to strain
owing to the boiler assuming an angular position due to the irregularity of the
surface over which the vehicle or vessel may pass.
The tubes C connecting the upper and lower drums A and B are arranged in
circular series and the internal series c may be preferably arranged with the
tubes at a relatively great distance apart for the purpose of securing a greater
effective area for the direct action of the gases, while the outer series c¹ may
be likewise arranged with the tubes at a relatively great distance apart for the
purpose of securing a large area of surface for the radiation of heat from the
outer casing F which may be preferably provided of a corrugated form (as illus-
trated in Figure 4) and may be provided with an interior lining of refractory
or non-conducting material.
A door G (Figures 2 and 4) may be provided upon one side of the outer
casing through which the burner employed for vapourising the liquid fuel
used or other fuel may be introduced, the series of tubes being interrupted at H
in a position opposite to the door to permit of this.
The lower part a' of the steam and water drum A and the upper part of the
lower water drum B are provided with flat surfaces upon which the vertical
tubes C may be secured so as thereby to obviate the necessity of bending the
tubes. The lower water drum B is preferably provided of substantially semi-
circular form and is constituted of a flat annular base plate b, upon which a
semi-circular section plate 61 may be superposed and bolted thereto. The feed
water is introduced into the lower water drum B by means of a circular channel 2
provided in the base plate b which channel is covered by a perforated plate 63
so that the water is thereby uniformally distributed into the drum with the
effect of maintaining the temperature of the water therein uniform.
In carrying the invention into effect as illustrated in Figures 3 and 4 of the
accompanying drawings the upper steam and water drum A may be provided
without a central aperture in which case the two parts a a¹ may be connected
together centrally by such means as a bolt or rivet or the upper part a may be
supported by means of a central perforated supporting tube or pillar G which
may be secured either to the upper plate a or to the lower plate a¹ of the drum A.
In such a case the flame and gases would pass outwardly and around the exterior
surface of the drum A through to the chimney or uptake H centrally disposed
in the outer casing F. A coil of pipe may further be provided and secured

page_text: to the tube connection D so that the steam may pass therethrough and thereby
be dried and superheated prior to its passing to the motor. .
For the purpose of guiding the upwardly issuing gases so as to pass through
the coil of piping I, a circular plate J may be surmounted upon the drum A
and the chimney H may project inwardly so that thereby the course of the gases
will assume the direction indicated by the arrows (Figure 3).
In carrying the invention into effect as illustrated in Figures 5 and 6 of the
accompanying drawings, the upper steam and water drum A may be provided of
circular form and a perforated supporting tube or pillar G may be provided
therein which may preferably be rivetted to the upper part a of the drum A.
The perforations in the supporting tube or pillar G permit through and unre-
stricted passage to both water and steam. Instead of providing a coil of piping
for drying or superheating the steam a dome J is secured upon the drum A
which projects within the passage of the upwardly issuing furnace gases in the
chimney or uptake H. Within the dome and issuing from the drum A a tube K
is provided and superposed thereupon is a bell L, which is also secured thereupon,
so that the steam passes from the steam space in the drum A through the tube K,
then downwardly through the bell L, and then upwardly to the outlet j of the
dome J, to the motor. The lower water or mud drum may be provided as
hereinbefore described or the base plate b may be provided with a circular channel
which is turned inwardly towards the top of the drum so that thereby the lower
part of the channel b is on a level with the flanges of the base plate b. In this
case the boiler is shown mounted in position upon pillars N to which the outer
flanges of the lower water or mud drum B are bolted.
Figure 7 illustrates a modification of the construction illustrated in Figure 5
in which a corrugated supporting pipe or pillar G is substituted for a plain
tube and in this case the respective flanges of the tube may be secured to the
upper and lower plates a a¹ of the drum A.
Figure 8 illustrates a modification of the construction illustrated in Figure 1
in which the upper steam and water drum A is formed of two plates a a', the
one al being provided with an inner flange a³ which extends to the flat surface
of the plate a and is bolted thereto. The outer casing may be formed and applied
in two parts the one F enclosing the space between the steam and water drum
and water and mud drum so as to leave the exterior joints from enclosure, while
the upper part F2 is superposed upon the steam drum A, and forms an uptake
through which the gases may escape or upon which an extension may be secured
for conducting the gases away.
Figure 9 shows in vertical section a modification of the construction illustrated
in Figure 3, in which a series of hollow stay tubes G² are employed which serve
the purpose of strengthening the drum while permitting the free upward passage
of the flames and gases to the central uptake F. The extremities of the tubes G2
are secured within a plate a which in turn is bolted to the upper part of the
drum A. The tubes G2 form strong and light stays and serve to break whatever
wash there may be in the steam and water drum resulting from the passage
of the vehicle over uneven surfaces.
In this case the space between the upper steam and water drum and the lower
water and mud drum is enclosed by means of a casing F which excludes the
exterior flange joints, while the gases are conducted away by means of the
uptake which is applied upon the top of the steam and water drum as illustrated.
Figure 10 is a vertical section showing a similar construction to that illus-
trated in Figure 3 in which a coil of piping J is mounted within the central
uptake I which in this case at the same time forms part of the steam and water
drum A: the coil similarly drying and superheating the steam before its passage
to the motor. The extremity of the coil J is secured in the central tube H of the
steam and water drum A. In this case the use of a separate uptake and cover
is obviated, while as in Figures 8 and 9 the space between the upper and lower

page_text: drums is enclosed by means of an outer casing F which permits of the exterior
flange joints being excluded.
In the modifications hereinbefore described the gases are either caused to pass
through the central aperture provided in the steam and water drum A, or they
are caused to pass upon the exterior of the steam and water drum the outer
casing being arranged to provide sufficient intersticial space for the unre-
stricted passage of the gases.
The plates from which the drums are formed may be rivetted or bolted, or
as illustrated in Figures 9 and 10 the parts may be secured together by means
of angle irons rivetted to the plates and bolted.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. A water tube boiler substantially as herein before described.
2. A water tube boiler of the type herein before specified in which the upper
steam and water drum and the lower water and mud drum are each formed of
two plates suitable shaped; and in which the respective drums are connected
together by a circular series of vertical tubes for the purpose and substantially
as hereinbefore described.
3. In a water tube boiler an annular water and mud drum having a circular
channel therein covered by a circular perforated plate through which the feed
water may be uniformly distributed substantially as herein before described.
4. In a water tube boiler of the type hereinbefore specified an upper steam and
water drum having a steam outlet connection provided thereupon so as to connect
two diametrically opposed orifices, so that steam may be conducted to a central
common outlet connection for the purpose and substantially as described.
5. In a water tube boiler of the type hereinbefore specified an upper steam and
water drum having a steam outlet connection provided as coiled piping situate
above the steam and water drum and in the path of the furnace gases so that
the steam may be dried and superheated in its passage therethrough substantially
as hereinbefore described.
6. In a water tube boiler such as herein before specified a steam and water
drum of circular form and provided with a perforated supporting tube or pillar
as illustrated in Figures 3, 5, and 7 of the accompanying drawings.
7. A water tube boiler of the type herein before specified in which the upper
steam and water drum and lower water and mud drum are connected by means
of a circular series of tubes, the inner series being widely spaced, and the outer
series being also widely spaced for the respective purposes herein before described.
8. A water tube boiler having a corrugated outer casing and for the purpose
and substantially as illustrated in Figure 4 of the accompanying drawings.
9. In a water tube boiler such as hereinbefore described the use of a series of
hollow stays such as G for the purposes and substantially as described and illus-
trated in Figure 9.
10. A water tube boiler substantially as and for the purposes herein before
described and severally as illustrated in the drawings.
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1
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.