Year: 1898

page_text: I, JOHN BROKENSHIRE FURNEAUX, of Victoria Works, Gateshead-on-Tyne, in the
County of Durham, Engineer, do hereby declare the nature of this invention to
be as follows:-
This invention has reference to an improved construction of vertical tubular boiler
capable of being easily and cheaply constructed and cleared, wherein an effective
water circulation will be set up when in use, and an efficient combustion and high
evaporative power attained.
To this end the generator comprises an outer cylindrical shell and an inner fire
box the lower portion of which is of truncated conical shape and the upper portion of
cylindrical shape, this latter portion being connected around a portion of its cir-
cumference and nearly the whole of its height to the outer shell by a number of
horizontal fire tubes the outer ends of which open into a smoke box that partly
surrounds the outer shell and is provided with one or more uptakes or chimneys.
The fire tubes are preferably arranged radially and one above the other in vertical
rows, and means are provided designed to distribute the fire gases amongst them as
equally as possible. For this purpose the inner ends of the lower horizontal rows of
tubes may be more or less contracted, as by ferrules, as also may the inner ends of
the tubes in the upper rows whose outer ends discharge near to the uptake or
uptakes from the smoke box. Other means for the purpose mentioned may however
be used in lieu of or in addition to the ferrules, such as two or more uptakes from
the smoke box, and baffle plates suitably arranged within the smoke box.
Means are provided for introducing air into the upper portion of the fire box for
insuring effective combustion of the hot gases therein. For this purpose open ended
air pipes, say of ell shape, are or may be arranged to extend through the bottom of
the smoke box and project into some of the tubes in the lowermost horizontal row
of tubes, such tubes constituting air supply tubes, the remaining tubes being fire-
tubes proper.
The upper portion of the steam generator is suitably strengthened as by gusset
plates, and is or may be connected to the top of the fire box by one or more
stay rods.

page_text: I, JOHN BROKENSHIRE FURNEAUX, of Victoria Works, Gateshead-on-Tyne, in the
County of Durham, Engineer, 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 has reference to an improved construction of vertical tubular boiler
capable of being easily and cheaply constructed and cleaned, wherein an effective
water circulation will be set up when in use, and whereby an efficient combustion and
high evaporative power can be attained.
The improved boiler is constructed as I shall now describe with reference to the
accompanying illustrative drawings wherein Figs. 1 and show the boiler in vertical
section and horizontal section respectively
The boiler comprises an outer cylindrical shell.1 and an inner fire box the lower
portion 2 of which is of truncated conical shape and the upper portion 2" of cylindrical
shape, this latter portion being connected around a portion of its circumference and
nearly the whole of its height to the outer shell 1 by a number of horizontal fire
tubes 3 the outer ends of which open into a smoke box 4 that partly surrounds the
said outer shell and is provided with one or more uptakes or chimneys. In the
example illustrated, a single centrally arranged uptake or chimney 5 is employed.
The fire tubes are preferably arranged radially and one above the other in vertical
rows, as shown, and means are provided designed to distribute the fire gases amongst
them as equally as possible. For this purpose the inner ends of the lower horizontal
rows of tubes may be more or less contracted, as by ferrules, as also may the inner
ends of the tubes in the upper rows whose outer ends discharge near to the uptake 5
(or uptakes). Other means for the purpose mentioned may however be used in
lieu of or in addition to the ferrules, such for example as two or more additional
uptakes 5 from the smoke box (see dotted lines in Fig. 2), and baffle plates
suitably arranged within the smoke box.
Means are or may be provided for introducing air into the upper portion of the
fire box for ensuring effective combustion of the hot gases therein. For this purpose
open ended air pipes 6, for example of ell shape as shown, are or may be arranged
to extend through the bottom of the smoke box and project into some of the
tubes 3 in the lowermost horizontal row of tubes, such tubes constituting air supply
tubes, the remaining tubes being fire-tubes proper. Or open ended pipes Ga
connecting the shell 1 to the upper portion 2ª of the fire box may be used for
supplying air to the fire box; or both sets of air pipes 6, 6* may advantageously
be used. The lower portion 2 of the fire-box may advantageously be provided with
an inclined cross tube 7 to promote circulation, to increase the heating surface,
and to baffle the flame and hot gases and prevent them rushing too quickly into
the smoke box. A fire grate (not shown) is suitably supported below the lower
conical portion 2 of the fire box.
The upper portion of the steam generator is suitably strengthened as by
gusset plates 7, and is or may be connected to the top of the fire box by a stay
rod 8.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
The improved steam boiler constructed substantially as hereinbefore described

page_text: with reference to the drawings annexed, whether with
tube 7.
or without the cross