Improvements in Steam Boilers.
Year: 1897

page_text: Improvements in Steam Boilers.
We, WILLIAM ELLIOTT, and WILLIAM GARROOD, Engineers, both of Ingate
Iron Works, Beccles, in the County of Suffolk, do hereby declare the nature of
this invention to be as follows:-
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This invention relates to steam boilers of the vertical type, and they may be
circular or other shape according to circumstances.
Starting at the bottom, the fire-box is substantially of ordinary construction
and may have one or more cross tubes either horizontal or inclined. Above the
crown of the fire-box is a water-space above which again is a combustion chamber
or space for heated gases formed by two more crowns at a suitable distance apart.
Across the water space one or more fire-tubes are placed connecting plates, and
through these the heated gases from the furnace pass to the fire-space above, across
which run a suitable number of short vertical water tubes, amongst which the
heated gases pass to the flue which passes through the steam space of the boiler
and out at the top either at one side or centrally according to circumstances.
Where the passage from the furnace to the combustion chamber is at one side,
the flue may with advantage be placed at the opposite side. Or where these
passages are opposite to each other a central flue may be employed, the object
being to cause the gases in the combustion chamber to pass as much as possible
amongst the water tubes. Any required deflectors or baffle plates may be employed,
and a cylindrical or approximately cylindrical circulation plate may be used in
the space between the furnace and the shell of the boiler.
One or more steam jets may be employed for clearing the combustion chamber
and any necessary stays, mud and man holes, may be employed as desired.
Dated this 30th day of April 1897.
BOULT & WADE,
Agents for the Applicants.
We, WILLIAM ELLIOTT, and WILLIAM GARROOD, Engineers, both of Ingate
Iron Works, Beccles, in the County of Suffolk, 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 steam boilers of the vertical type its obiect being the

page_text: construction of a boiler so that it may easily be placed in position where there is
very little space, such as the hold of a fishing vessel, and at the same time may be
most efficient as regards combustion of fuel, circulation of water, and generation
of steam.
An internally contained combustion chamber, or space for the heated gases is
employed which materially increases the heating surface of the boiler and as the
whole arrangement is self-contained without smoke boxes or the usual uptakes,
lagging can be very easily and efficiently applied, consequently very little heat
is radiated into the boiler room, which therefore, is cooler than under ordinary
circumstances.
In the accompanying drawings,
Figure 1 is a vertical section of a boiler according to this invention.
Figures 2, 3 and 4 are horizontal sections on the line 2-2, 3-3 and 44
respectively of Figure 1.
Like letters indicate like parts throughout the drawings.
A is the shell of the boiler. B is the fire-box, which may be of the ordinary
construction, having in the example illustrated-one cross tube C inclined at
an angle of about 45°.
Above the crown of the fire-box B and separated from it by a water space D
is the combustion chamber E or space for heated gases constituted by an internal
drum and connecting the top and bottom tube plates EE of the combustion
chamber are a number of short, vertical water tubes F, between which the hot
gases circulate.
. Hosh
Across the water space D, and serving partly to support the combustion
chamber E, is a tube or passage G, connecting the fire-box B with the interior
of e combustion chamber E
Into the top of the combustion chamber is fitted the smoke tube or flue H,
which passes through the steam space J and thence out at the top of the shell.
The heated gases pass from the fire-box, through the passage G into the com-
bustion chamber E in which they pass among the water tubes F, giving up their
heat to the water.
From thence they pass through the flue H, giving up still more of their heat
in their passage through it.
It is obviously advantageous to so arrange the tube G and the flue H, that they
may be at opposite sides of the combustion chamber, thus causing the gases to pass
through the water tubes F as much as possible.
Various details of construction are not shown in the drawings, such as:-
Sight and blast holes into the combustion chamber, stays, mud and man-holes,
furnace doors, for these can all be fitted as may be desired.
Also any required deflation or baffle plates may be employed in the spaces
traversed by the hot gases; and cylindrical approximately cylindrical or segmental
circulation plates may be used in the water space, between the furnace and the
shell of the boiler.
One or more steam jets may also be employed for clearing the combustion
chamber.
The drawings given herewith, whilst illustrating a design which has been found
satisfactory are not by any means the only construction which may be used. It
is obvious that several modifications may be made in the design to suit varying
circumstances. For example:-
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The inclined tubes in the fire-box may be made horizontal, or there may be
two or more tubes.
The passage for heated gases, or flue, from the crown of the fire-box into the
combustion chamber, may be of any shape, or in any position, or there may be
two or more such flues.
The flue or smoke tube may be vertical as shown or it may pass through the
side of the boiler, or there may be two or more such flues. The disposition of
the passage G or its equivalent and the flue or smoke tube H or the like relatively

page_text: to each other and the water tubes F should be such as is best adapted to promote
a thorough circulation of hot gases among the latter.
The combustion chamber may be horizontal as shown or may be inclined to
any desired shape.
The water tubes passing through the said combustion chamber, may be of any
shape or size, or in any position.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is:-
1. In a vertical boiler an internal combustion chamber traversed by water tubes
and having inlet and outlet passages for hot gases disposed in relation to the water
tubes and each other substantially as and for the purpose described.
2. The combination and arrangement of parts constituting the complete boiler,
substantially as and for the purpose described and illustrated in the accompanying
drawings.
Dated this 15th day of September 1897
BOULT & WADE,
Agents for the Applicants.