IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS
Year: 1884

page_text: I FREDERICK DUMELLA ROSE of Flixton near Manchester, Engineer, do hereby
declare the nature of my invention for "IMPROVEMENTS IN THE CONSTRUCTION
OF STEAM BOILERS" to be as follows:-
The objects of the improvements are to construct steam boilers of the class
known as "sectional" which shall be capable of internal or central firing, and to
enable the tubes composing the sectional boiler to readily obtain the requisite heat,
and to facilitate cleansing purposes.
To accomplish this, and to effect my improvements, I arrange a convenient number
of tubes longitudinally side by side, by preference so that their ends form one or
more rings, either circular, eliptical or oval. In case of more than one ring, the
same are arranged in concentric rings, but other forms may be adopted.
The ends of these tubes are attached to a plate at one end of the series, and to
another plate at the other end thereof each of which plates forms one side of a
chamber, by preference circular, making complete water communication possible
between all the tubes at each end. Through the tubes aforesaid pass tubes of
smaller bore which extend also through the water chambers described, and are
attached to the outer shell of each of them. Outside these, another chamber is
formed at each end, or it may be at one end only, for the purpose of making
complete communication of the inner tubes one with another.
Through these chambers, by preference through the centre thereof, is an opening
wide enough to admit of firing, and which forms a flue for internal or central firing,
the whole arrangement being suitably enclosed in a casing of metal, or firebrick,
or both.
Suitable openings are formed in one or both chambers for the purposes of
connection with a steam chamber, and for clearing out sediment, and the front and
back plates may be made capable of removal for facilitating the cleaning of the
tubes.
Two or more sets of chambers and tubes may be coupled up or joined together
either end to end, side by side, or other convenient manner if required.
In practice, the heated gases play about the outer surfaces of the tubes first
mentioned, and the flues formed in the front and back chambers, passing thence

page_text: through the inner or smaller tubes into the combustion chamber in front, and then
back again through suitable flues to the chimney.
The number, shape, and size of the tubes may be varied, and the chambers may
be variously formed, without departing from the peculiar character of the invention,
which consists of the employment of combustion and water chambers in connection
with sections or water tubes having other tubes for the conveyance of heated gases
from one end to the other, passing through them, and arranged in rings or other
suitable forms for the construction of steam boilers in such manner, as to be capable
of being internally or centrally fired.
Dated this 25th day of Janu1001

page_text: "
I, FREDERICK DUMELLA ROSE, of Flixton near Manchester, Engineer, do hereby
declare the nature of my invention for IMPROVEMENTS IN THE CONSTRUCTION OF
STEAM BOILERS" and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:--
The objects of the improvements are to construct steam boilers for stationary
marine or locomotive purposes of the class known as "sectional" which shall be
capable of internal or central firing, and to enable the tubes composing the sectional
boiler to readily obtain the requisite heat, and to facilitate cleansing purposes.
To accomplish this and to effect my improvements, I arrange a convenient
number of tubes longitudinally side by side by preference so that their ends form
one or more rings, either circular, eliptical, or oval or straight sided figures. In case
of more than one ring, the same are arranged by preference in concentric rings,
but other forms may be adopted.
The ends of these tubes are attached to a plate at one end of the series, and to
another plate at the other end thereof, each of which plates forms one side of a
chamber, by preference circular, making complete water communication possible
between all the tubes at each end.
•
Through the tubes aforesaid, pass tubes of smaller bore, which extend also
through the water chambers described, and are attached to the outer shell of each
of them. Outside these another chamber is formed at each end, or it may be at one
end only, for the purpose of making complete communication of the inner tubes one
with another.
Through these chambers, by preference through the centre thereof, is an opening
wide enough to admit of firing, and which forms a flue for internal or central firing.
The whole arrangement being suitably enclosed in a casing of metal, or firebrick, or
both.
Suitable openings are formed in one or both chambers for the purpose of
connection with a steam chamber, and for clearing out sediment, and the front
and back plates may be made capable of removal for facilitating the cleaning of
the tubes.
Two or more sets of chambers and tubes may be coupled up or joined together
either end to end, side by side, or other convenient manner if required.
In practice the heated gases play about the outer surfaces of the tubes first
mentioned, and the flues formed in the front and back chambers, passing thence
through the inner or smaller tubes into the combustion chamber in front, and then
back again through suitable flues to the chimney.
The number, shape, and size of the tubes together with their distances apart may
be varied, and the chambers may be variously formed without departing from the
peculiar character of the invention, which consists of the employment of combustion
and water chambers in connection with sections or water tubes having other tubes
for the conveyance of heated gasses from one end to the other, passing through them,
and arranged in rings or other suitable forms for the construction of steam boilers
in such manner as to be capable of being internally or centrally fired.
But that the improvements may be better understood, I will by the aid of the
accompanying drawings proceed more fully to describe means employed by me.
DESADIDIKAN An DRAWINGO

page_text: where the tubes are grouped in single rings; and Fig. 3. shews an arrangement
where such are grouped in a double ring. The same letters indicate corresponding
parts wherever they occur.
a, a, are the tubes through which the water or steam is permitted to circulate,
and b, b, are the inner tubes through which the heated gasses pass.
c, c; are
the chambers for water and steam enabling the tubes a, a, to have complete
communication one with another.
d, d, are the combustion chambers at each end, or it may be one only of these
may be used, for to enable the heated gasses to have free communication through
the tubes b, b, on their way to the flues and chimney. e, e, is the opening or flue
for internal firing in which special or ordinary fire bars may be used.
In the drawings the tubes are arranged in circular form for convenience and by
preference, but eliptical, oval, or other forms composed either of curves or straight
lines may be adopted which admit of internal firing.
The outer casing of metal or firebrick is not'shewn as it may be of any convenient
form, and the flues may be taken in any suitable direction.
Variations in detail may be made, and the number of concentric rings of tubes
used may be increased, or cross circulating tubes may be applied thereto without
departing from the peculiar character of my invention.
Having now particularly described and ascertained the nature of my, said
invention, and in what manner the same is to be performed.
I declare that what I claim is:
The construction of sectional steam boilers for stationary marine or locomotive
purposes composed of tubes arranged in one or more rings, either of circular, oval,`
eliptical, or other forms attached to water chambers at each end, and having passing
through them other tubes attached to combustion chambers at one or both ends in
such manner that the whole shall be capable of internal firing substantially as.
shewn and described.