IMPROVEMENTS IN STEAM BOILERS OR GENERATORS
Year: 1884

page_text: I, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co, Patent Agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature
of my invention for "IMPROVEMENTS IN STEAM BOILERS OR GENERATORS is
to bo
as follows:-
L 1:
This invention relates to an improved steam boiler or generator which occupies a
small space and which is intended to produce, in a regular and uniform manner,
sufficient steam for driving a small engine, and requires only inconsiderable
quantities of water.
The said boiler which belongs to that class known as tubular boilers, is provided
with a funnel for the reception of the fuel (coal, coke or the like) which is
introduced through a suitable aperture above, and falls down upon a circular,
cage-liko. gråte. The said aperture is closed by a removable lid or cover, while
the said grate is capable of being opened by means of a handle and bell-crank
lever suitably applied thereto so that the fire-place may be emptied at once, if
required.
The feed-water, by means of a suitable foed-pump is forced into an economizer
or heater arranged outside the boiler proper, and hero is brought into contact with
the exhaust-steam from the engine so that, through an inlet-valve, it will enter, in
a heated state, a system of pipos arranged around the fire box, and forming tho
lower part of the boiler. In this lower system of pipos the water begins to boil;
the steam generated rising through a pipe into a second system of pipes arranged
above the first system of pipes. The pipes of the second system communicate with
each other near their lower ends by means of connecting passages. Thus the
steam will have to pass through all the pipes of the second series, thereupon it
will enter a third system of pipes arranged concentrically inside the second system;
the pipes of the third series also. communicating with each other near their lower
ends by means of connecting passages.
To each of the said systems of pipes is attached a system of wrought-iron
heating-tubes the said beating tubes corresponding in number to the pipes to
which they are attached, or suspended, so as to. enter the, lower part of the fire-
place. The said heating. tubes are in open communication with the systems of
pipes respectively.
:

page_text: COMPLETE SPECIFICATION.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake, and Co, Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the naturo
of my invention for "IMPROVEMENTS IN STEAM BOILERS OR GENERATORS" 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 an improved steam boiler or generator which occupies
only a small space and which is intended to produce, in a regular and uniform
mannor, sufficient steam for driving a small engino, and requires only inconsiderable
quantities of water.
In the accompanying drawing.
Figure 1 is a vertical section of a boiler constructed according to this invention.
Figure 2 is a plan, partly in section, of the same.
The said boiler, which belongs to the class of boilers known as tubular boilers, is
provided with a furnace surrounded by the series of tubes. B. The fuel (coal, coke
or the like) is introduced through a suitable aperture x, and falls down upon the
circular cage-like grate E. The said aperture is closed by a removable lid or cover,
while the said grate is capable of being opened by means of a handle and bell-
crank-lever suitably applied thereto, so that the fire-place may be emptied at once if
required.
The feed-water is forced, by means of a suitable feed-pump, into an economizer
or heater A arranged outside the boiler proper, and is there brought into contact
with the exhaust steam from the engine, so that through the inlet-valve a it will
enter in a heated state the series of tubes B arranged around the furnace and
forming the lower part of the boiler.
In this lower series of tubes the water begins to boil, the steam generated rising
through the pipe b into the series of tubes C arranged above the said series of
tubes B. The tubes C communicate with each other at their upper ends, and near
their lower ends by means of the connecting passages c. It will be seen that the
steam generated in the tubes B has to pass through all the tubes C before it enters
a third series of tubes D arranged concentrically inside the second series of tubos C.
The said tubes D of the third series also communicate with each other near their
lower ends. by means of the connecting passages d.
To cach of the said series of tubes Ĉ and Ď is attached a series of wrought-iron
heating-tubes C¹ and D' respectively, the said heating-tubes corresponding in
number to the tubes C and D, to which they are attached or suspended, so as to
enter the lower part of the furnace. The said heating tubes C¹ and D' are in open
communication with the series of tubes C and D, respectively.
The tubes of the boiler may be made of any suitable metal, preferably wrought
or cast-iron; and may be arranged around and within the said furnace, so as
to have any convenient sectional form. A circular form is preferable, as the
largest possible heating surface in a small space around a relatively small furnace
is thus obtained, the generation of the steam being conducted so that the water to
be converted into steam, enters, systematically, elements having a progressively
increased temperaturo,

page_text: The heating-tubes C¹ D' entering the said furnace are, preferably, pointed at
their lower ends with a view to enable them to resist the action of the heated gases,
by spreading the latter more readily than would be the case if the tubes were
provided with flat or rounded ends and welded bottom-pieces, it being obvious that
in the latter case the said gases would strike full against the lower surfaces of the
tube-ends with a tendency to destroy them.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to
me by my foreign correspondent, I declare that what I claim is
In a steam boiler or generator, the combination, with the economizer A and the
series of tubes B arranged to surround the furnace of the said generator, of the
series of tubes C, D provided with the corresponding series of heating tubes C¹ D'
entering the said furnace, substantially as, and for the purpose, specified.