Year: 1886

page_text: Date of Application, 13th Nov., 1886
• Complete Left, 18th June, 1887.
Complete Accepted, 19th July, 1887.
I, JOHN MCCOOL, of 57 Moorgate Street, in the City of London, Engineer do hereby
declare the nature of this invention to be as follows:-
The object of this invention is to produce a steam boiler, for land and marine
purposes, which shall bo simple in construction, shall be provided with efficient means
for effecting a thorough circulation of the water in it, with a recoptacle for the purpose
of receiving sediment, or impurities, removed from the action of the fire, with a
combustion chamber so arranged that the combustion, commenced in the furnace, shall
be thoroughly completed before the gases escape to the chimney, or funnel, with
arrangements which render all parts of the boiler accessible for cleansing, inspection,
and repair, both externally and internally, with comparatively large water surfaces to
prevent priming, with the water space divided into comparatively small sections, so
that the explosion of one section need not necessarily lead to the destruction of the
entire boiler, and the setting is so arranged that any part of it can be easily
removed to give access to the parts of the boiler, or to enable repairs to be
effected.
For these purposes, I construct the boiler of a series of cylindrical vessels, of
wrought iron, or steel, placed more or less horizontally, and connected together
vertically by neck tubes. These cylindrical vessels are placed one above another, and
side by side, to any required number, and may be placed across the furnace, or more
or loss parallel thereto, the ends being supported by walls built of fire blocks, grooved
and tongued, or dovetailed together, and secured by iron frames, cramping plates, or
bars; the flues and bridges may be constructed of fireclay blocks, or slabs, similarly
connected together. The furnace and combustion chamber are constructed so, that the
flame from the furnace runs under the lower cylindrical vessels into a combustion
chamber, thence by suitable flues over and under the cylindrical vessels next above to
the front end into a smoke box or second combustion chamber, and thence by other
suitable flues over and under the upper cylindrical vessels to the chimney or funnel.
The connecting necks are arranged in line and provided with suitable internal tubes
for the purpose of securing circulation of the water between the upper and lower
cylindrical vessels. Each cylindrical vessel is provided with a manhole at its end, or
in other suitable position, to facilitate its inspection and cleaning. One or more

page_text: cylindrical vessels, similar to those above described, may be placed in a position where
they are not acted on by the fire, and beneath, but connected with, those which are
subjected to the action of the fire or hot gases, for the purpose of receiving and
collecting the sediment, or other impurities, precipitated from the water, such sediment
being removed from such cylindrical vessels or receivers by the ordinary process of
blowing out when required.
I employ a similar arrangement for securing circulation of the water in a vertical
boiler; for this purpose I employ a series of Ŭ shaped tubes fixed in the crown of the
furnace, with their bent parts extending down into the fire, and into the upper ends of
the said U tubes, which are expanded, or otherwise secured in the crown of the
furnace, I fit tightly coned discs, with a hole in the centre of each, which receives a
circulating tube, and with a hole or holes at the side of the central hole, to allow of
the escape of steam and heated water. The circulating tube at one side of the U tube
reaches down to near the bottom of the latter, and is left nearly flush with the disc at
top thereof. The other circulating tube, at the other side of the U tube, only extends
a short distance down the latter, but stands above the disc at the top thereof, and is
terminated by a spreading cap, or is continued down, more or less, into the side water
space of the boiler; by these means a constant circulation of water through the U tubes
is effected. The discs, in the upper ends of the U tubes, help to keep the tubes tight
in the tube, or crown plate, at the same time that they serve as stays for the circulating
tubes.
D
11
o
1
T
1000

page_text: Improvements in Steam Boilers and in Settings for same.
I, JOHN MCCOOL, of 57 Moorgate Street, in the City of London, Engineer,
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, reference being had to the accompanying two sheets of Drawings and to the
letters and figures marked thereon :-
a steam boiler for land and marine
The object of this invention is to produce
purposes which shall be simple in construction, shall be provided with efficient means
for effecting a thorough circulation of the water in it, with a receptacle for the purpose
of receiving sediment or impurities, removed from the action of the fire, with a
combustion chamber so arranged that the combustion, commenced in the furnace, shall
be thoroughly completed before the gases escape to the chimney or funnel, with
arrangements which render all parts of the boiler accessible for cleansing, inspection
and repair both externally and internally, with comparatively large water surfaces to
prevent priming with the water space divided into comparatively small sections so
that the explosion of one section need not necessarily lead to the destruction of the
ontire boiler, and in which the setting is so arranged that any part of it can be
easily removed to give access to the parts of the boiler, or to enable repairs to be
offected.
Figure 1 of the Drawings hereto annexed is a vertical section, taken at line 1--1 of
Figure 2, of a boiler suitable for land purposes constructed in accordance with
my invention and Figure 2 is a section of same taken at line 2-2 of Figure 1.
The boiler is constructed of a series of cylindrical vessels A of wrought iron or
steel placed more or less horizontally and connected together vertically by neck
tubes B. These cylindrical vessels are placed one above another, and side by side to
any required number, and they may be placed across the furnace or more or less
parallel thereto, the ends being supported by walls built of fire clay blocks grooved
and tongued or dovetailed together, and secured by iron frames, cramping plates, or
bars; the flues and bridges may be constructed of fireclay blocks or slabs similarly
connected together. The lower cylindrical vessels A may preferably be arranged so
as to form the sides of the furnaces as shown in Figure 2. The flame and hot gases
of combustion are conducted from the furnaces Cinto the combustion chamber CT and
thence successively under and amongst each range of cylindrical vessels A in the
direction of the arrows by means of the fire clay slabs or baffles D before escaping to
the chimney or funnel. Each connecting neck tube B is arranged in line with the
next below or above to allow of the introduction of an internal tube E for the purpose
of securing circulation of the water between the upper and lower cylindrical vessels.
Each cylindrical vessel is provided with a manhole at its end, or in other suitable
position to facilitate its inspection and cleaning. A' is a steam, collecting chamber
connected by suitable necks A³ with the upper range of water vessels A. One or more

page_text: .
cylindrical vessels F, similar to those above described, are preferably placed in a
position where they are not acted on by the fire, and beneath, but connected by neck
tubes with the lowermost of those which are subjected to the action of the fire or bot
gases, for the purpose of receiving and collecting the sediment or other impurities
deposited from the water, such sediment being removed from time to time from such
vessels or receivers F by the ordinary process of blowing out through the blow off
pipe or pipes G. The feed water may in most cases be introduced into the sediment
receiving vessel F.
Figures 3 and 4 show to an enlarged scale the arrangement of one of the
circulating pipes in the neck tubes and the means for holding it centrally therein.
B represents a neck tube, E the circulating pipe therein, E' a flange of malleable cast
iron or other suitable material with perforations E therein and guide wings E³ thereon
which guide wings pass into the upper end of the neck tube, and hold the circulating
pipe E (which passes through the flange E¹) centrally therein. The pipe E is made
up of short lengths screwed together for convenience of getting them in and out
through the vessels A. It will be readily understood that the pipe E facilitates
the circulation of the water in the cylindrical vessels A in the direction of the
arrows, that is to say, the hotter water ascends from the lower to the upper
vessels through the necks B round the outsides of the pipes E and the cooler
water descends from the upper to the lower vessels through the insides of the
pipes E.
Figure 5 is a front elevation of a similar boiler arranged with furnaces at both ends
for marine purposes, Figure 6 is a longitudinal section of same on line 3-3
of Figures 5 and 7, and Figure 7 a transverse section of same on line 4-4 of
Figure 6.
Similar letters of reference relate to like parts in all the Figures 1 to 7 inclusive.
The cylinders composing the above described boiler, as also the necks connecting
the cylinders, may be made plain or corrugated like Fox's flues; they may be rivetted
longitudinally, but preferably welded, or they may be rolled out by special machinery
from a pierced block of steel or from a welded coil. The ends of the cylinders are
preferably made dished or corrugated as shown in section at Figures 2, 13 and 14.
All the parts may be made universal or interchangeable, so that repairs may be easily
effected, and a boiler of any desired power produced by combining a sufficient number
of such parts.
Figure 8 is a plan, and Figure 9 an end view, of one of the fireclay blocks employed
in the construction of the setting, showing the grooves and tongues by which the blocks
are fitted together.
I employ a similar arrangement for securing circulation of the water in a vertical
boiler; for this purpose I employ the arrangements illustrated in Figures 10 and 11
of the drawings in which Figure 10 is a vertical section and Figure 11 a horizontal
section of a vertical boiler. H are U shaped tubes fixed in the crown I of the fire
box J, with their bent parts extending down into the fire. Into the upper ends of the
said U tubes, which are expanded, or otherwise secured in the crown plate I, I fit,
tightly, coned discs K (see Figure 12 which is a section of the upper ends of a U tube
to a larger scale than Figure 10) with a hole in the centre of each which receives a
circulating tube M and with a hole or holes L at the side of the central hole to allow
of the escape of steam and heated water from the U tube. The circulating tube M in
one branch of the U tube reaches down to near the bottom of the latter, and is left
nearly flush with the disc at top thereof. The other circulating tube M in the other
branch of the U tube extends only a short distance down the latter but stands above
the disc at the top thereof and is either terminated by a spreading cap of the kind
now well known in connection with circulating tubes of this kind, or is continued down
more or less into the side water space of the boiler as shown at M', by these
means a constant circulation of water, through the U tubes is effected. The discs
in the upper ends of the U tubes help to keep the tubes tight in the tube or
crown plate I at the same time that they serve as stays or guides for the circulating
tubes M.

page_text: Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I desire to have it understood
that I make no claim generally to the construction of boilers from a series of
cylindrical vessels connected together by neck tubes, as I am aware that boilers so
constructed have already been used, but I declare that what I do claim is :-
First The combination of a series of cylindrical vessels connected together by
neck tubes, with a setting composed of fireclay blocks or slabs tongued and grooved or
dovetailed together, as hereinbefore described, and illustrated in Figures 1, 2, 5, 6 and 7
of the Drawings hereto annexed.
Second-In boilers composed of a series of cylindrical vessels connected together
by neck tubes the use of circulating tubes or pipes passing through and held
or steadied centrally in such neck tubes, as hereinbefore described, and illustrated
in Figures 1, 2, 3, 4, 6 and 7 of tho Drawings hereto annexed.
Thurd-In boilers composed of a series of cylindrical vessels connected together by
neck tubes the use of dished or corrugated end plates in the said cylindrical vessels
as hereinbefore described, and illustrated in Figures 2, 13 and 14 of the Drawings
hereto annexed.
Fourth-The use of fireclay blocks or slabs grooved and tongued or dovetailed
together for the purpose of constructing the walls, bridges, flues, or tops of boiler
settings as hereinbefore described, and illustrated in Figures 1, 2, 6, 7, 8 and 9 of the
Drawings horeto annexed.
Fifth In circulating tubes secured in the tube plates of boilers the use of perforated
conical discs for supporting the internal circulating tubes and assisting in the securing
of the outer circulating tubes in the tube plates, as hereinbefore described, and
illustrated in Figures 10, 11 and .12 of the Drawings hereto annexed.