IMPROVEMENTS IN STEAM BOILERS
Year: 1885

page_text: I, OWEN MEREDITH of 8 Charles Place, Hotwells in the City and County of
Bristol, Foreman Boiler Maker do hereby declare the nature of my said Invention
for "IMPROVEMENTS IN STEAM BOILERS," to be as follows:-
My invention relates to improvements in vertical steam boilers and consists in
constructing the boiler with a rectangular projection from the shell of the boiler
where the front tube plate is connected and in providing the said boiler with
two separate smoke boxes in front of the said projection into which smoke-boxes
the tubes are radiated from the combustion chamber.
The shell of the boiler is circular with a hemispherical or dome top. The fire
box is of conical form with rounded top and the combustion chamber which is
close to the shell has an angular water space at its back and the tube plate is
bent in the centre so as to be at right angles with the separate groups of tubes, the
said combustion chamber being connected with the fire box by a small opening.
The bottom of the said combustion chamber is tippet-shaped and the top can be
either flat or rounded. The front tube plate is secured to a rectangular projection
from the shell of the boiler and two separate smoke boxes are provided in front of
the said tube plate the said smoke boxes communicating with one chimney and
having a space between them where the tube plate is not perforated. The tubes
of the boiler radiate from the combustion chamber to the front tube plate and
enter the said smoke boxes the said tubes being thus spread out and formed into
two groups with a space between them.
T. N. PALMER & Co.,
For the Applicant.

page_text: ·
Figure 1 is a front elevation of my improved boiler.
Figure 2 is a vertical section, and
Figure 3 is a horizontal section of the same.
Like letters indicate like parts throughout the drawing.
The shell A of the boiler is circular, with a hemispherical or dome top. The
fire-box B is of conical form with a rounded or dome top and is connected with the
combustion chamber C by a flue or passage D. The combustion chamber is
arranged in the position shown in the drawings and the front of the said com-
bustion chamber C is formed by the back tube-plate C₁ which is bent in the centre
to an obtuse angle as shown in figure 3. The plate C is curved or dished
and forms, in one piece the back, top, bottom and sides of the combustion
chamber C. The back tube-plate C¹ which forms the front of the combustion
chamber is secured to the flue D of the fire-box by the flange c. The lower
edge of the plate C³ is secured to the flue D and the upper and side edges of the
said plate are secured to the flange c¹ of the tube-plate C¹.
The tubes E radiate (as shown in Figure 3) from the combustion chamber C to
the front tube-plate F which is fixed on or in a rectangular projection G extending
from the front of the shell of the boiler. The back tube-plate C₁ is bent to an
obtuse angle as before described so that when the tubes E are inserted therein at
right angles they are formed into two groups or clusters with a space E¹ between
them gradually increasing in width towards the front of the boiler as shown in
figure 3 The front tube-plate F is bent in a similar manner to the back tube-
plate C¹ so as to receive the tubes E at right angles. In front of the tube-plate F
and of the rectangular projection G I arrange two smoke-boxes H, one group or
cluster of tubes entering each smoke-box, the said smoke-boxes opening into one
chimney I and having a space between them where the front tube-plate is not
perforated.
If it is desired to employ tubes of increased length two separate front tube-plates
may be employed instead of the one front tube-plate F, that is to say a separate
front tube-plate for each group of tubes, the said plates being fixed at a greater

page_text: distance from the shell of the boiler as shown in dotted lines at f figure 3, and
arranged at an obtuse angle to each other as shown, so as to be parallel with the
back tube-plate C'. Also instead of two smoke-boxes being provided there may
be one smoke-box only, common to both groups of tubes. The tubes E may also
incline upwards towards the front of the boiler if desired.
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
First In a vertical steam boiler, a combustion chamber having its back, top,
bottom, and sides formed by a single plate 02 substantially as herein set forth.
Second-In a vertical steam boiler, the back tube-plate C¹ constructed and
arranged substantially as herein set forth.
Third: In a vertical steam boiler, arranging the tubes E in two groups or
clusters radiating from the combustion chamber C to the front tube-plate or plates
and smoke-box or boxes substantially in the manner herein set forth.
Fourth In a vertical steam boiler, the combination of the combustion
chamber C, tubes E, radiated in two groups or clusters, front tube-plate F or
plates secured in or on projection G, and smoke-box or boxes H constructed
and arranged substantially in the manner herein set forth.
1007
T. N. PALMER & Co.,
For the Applicant.