IMPROVEMENTS IN VERTICAL STEAM BOILERS to be as follows:-
Year: 1884

page_text: TRUVIDIONAL OF ECIFICATION.
I ROBERT COLES of the firm of Coles and Matthews of Queens Road Coventry
in the County of Warwick Machinists and Boiler Makers do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN VERTICAL STEAM BOILERS
to be as follows:-
"
My invention consists of the construction and combination hereinafter described
of the parts of vertical steam boilers.
My invention is principally applicable to the boilers of combined vertical steam
engines and boilers.
In the fire space of the boiler I arrange two cross water tubes crossing the
boiler nearly in the direction of a diameter. Each of these water tubes is curved
its lower end being horizontal and its upper end vertical. The lower horizontal
ends of these two cross tubes open into the water space of the boiler on opposite
sides and the upper vertical ends of the two cross tubes open into a conical or
cylindrical sleeve or case situated in the steam space and surrounding the vertical
uptake or flue by which the fire and heated air and products of combustion are
conveyed from the boiler. This sleeve is closed at top but open at bottom its open
lower edge being at about the water level.
As the curved cross tubes described are heated by the fire the water in them
entering into ebullition the mixture of water and steam is projected into the said
sleeve and strikes the uptake or flue by the heat of which the suspended particles
of water or "priming are volatilized and converted into steam. The steam
formed escapes under the lower end of the sleeve into the steam space. The heat
thus communicated by the uptake to the priming in converting it into steam
prevents the said uptake being injuriously affected by the heat of the escaping
products of combustion.
Mud doors are made in the shell of the boiler opposite the horizontal ends of the
cross tubes for cleaning the said tubes.
Boilers made according to my invention are economical in construction and
efficient in use.

page_text: I ROBERT COLES of the firm of Coles and Matthews of Queen's Road Coventry
in the County of Warwick, Machinists and Boiler Makers do hereby declare the
nature of my Invention for " IMPROVEMENTS IN VERTICAL STEAM BOILERS " and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
My invention consists of the construction and combination herein after described
of the parts of vertical steam boilers.
My invention is principally applicable to the boilers of combined vertical steam
engines and boilers, but I do not limit myself to the application of my invention
to any particular purpose.
In the fire space of the boiler I arrange two cross water tubes crossing the boiler
nearly in the direction of a diameter. Each of these water tubes is curved, its
lower end being horizontal and its upper end vertical. The lower horizontal ends
of these two cross tubes open into the water space of the boiler on opposite sides
and the upper vertical ends of the two cross tubes open into a conical or cylindrical
sleeve or case situated in the steam space and surrounding the vertical uptake or
flue by which the fire and heated air and products of combustion are conveyed
from the boiler. This sleeve is closed or partially closed at top but open at
bottom, its open lower edge being at about the water level.
As the curved cross tubes described are heated by the fire, the water in them
entering into ebullition the mixture of water and steam is projected into the said
sleeve and strikes the uptake or flue by the heat of which the suspended particles
of water or "priming" are volatilized and converted into steam. The steam
formed escapes under the lower end of the sleeve into the steam space, or when
the sleeve is only partially closed the steam escapes at the top. The heat thus
communicated by the uptake to the priming in converting it into steam prevents
the said uptake being injuriously affected by the heat of the escaping products of
combustion.
Although for convenience of description I have described the use of two cross
tubes only yet a series of the said tubes arranged in the manner represented in
the Drawings may be employed; or two three or more single tubes may be used.
Mud doors are made in the shell of the boiler opposite the horizontal ends of the
cross tubes for cleaning the said tubes.
Boilers made according to my invention are economical in construction and
efficient in use.
Figure 1 of the accompanying Drawinga represents in vertical section taken on
the line A B Figure 2 and Figure 2 in plan, a vertical steam boiler constructed
according to my invention; Figure 1A is an explanatory diagram herein after
referred to; Figure 3 represents in plan and Figure 4 in section a portion of the
upper part of the conical sleeve or case and its collar drawn to a larger scale;
Figure 5 represents in plan and Figure 6 in section the arrangement for fixing the
vertical ends of the water tubes to the top of the fire box and Figure 7 represents
in plan and Figure 8 if section the arrangement for fixing the horizontal ends of
the water tubes in the sides of the fire box, the said Figures 5, 6, 7 and 8 being
drawn to a larger scale than Figures 1 and 2.

page_text: The same letters or reference indicate the same parts in the several Figures of
the drawings.
a is the fire space or fire box of the boiler; b the water space and c the steam
space; d is the vertical uptake or flue by which the heat and products of
combustion are conveyed from the boiler.
In the fire space or flue a four pairs of cross water tubes are arranged in tiers
or at different levels, the said water tubes crossing the boiler nearly in the direc-
tion of a diameter and arranged with respect to one another in the manner best
seen in Figure 2. The lowest pair of the water tubes is marked e, e; the next
pair above is marked ff and the next pair above the last is marked g, g³ and
the top pair is marked h, h. Each of the water tubes is bent or curved at about
the middle, its lower part being horizontal or nearly so and its upper part vertical
as will be seen by referring to the pair of tubes marked ff' in Figure 1 and in
the explanatory diagram Figure 14. The said Figure 1ª represents in section both
the tubes e, and exhibits the manner in which they open into the water and
steam spaces of the boiler. The said explanatory diagram Figure 1* represents both
the tubes e, e' in vertical section but as the said tubes are situated in different
vertical planes it will be understood that the said diagrain does not represent any
single section that can be taken through the boiler. It however exhibits more
readily the construction and arrangement of the pair of water tubes than the true
section Figure 1.
The lower horizontal end of one of the cross tubes of each pair opens into the
water space b at one side of the boiler and the lower horizontal end of the other
tube of each pair opens into the water space at the opposite side of the boiler (see
the plan Figure 2) and the upper vertical ends of the several water tubes open into
the conical sleeve or case i surrounding the uptake or flue d. The horizontal ends
of the several tubes which open into the water space of the boiler are marked k
and the vertical ends which open into the sleeve i are marked m. The top ends
of the water tubes are fixed in the top of the fire box a by driving a loose taper
ring n (best seen in Figures 5 and 6) between the tube and hole in the plate of the
fire box, the joint being finished by caulking and the bottom or horizontal ends
of the water tubes are fixed in the sides of the fire box by expanding the ends of
the said tubes on the outside of the fire plate and beading over the expanded ends
as best seen in the enlarged views Figures 7 and 8.
It will be seen by an examination of Figure 1 that the horizontal parts of the
water tubes are slightly inclined upwards from their open ends, where they join
the water space b, to the vertical parts of the tubes. By this upward inclination
of the horizontal parts of the tubes the circulation of the water is promoted.
The conical sleeve i surrounding the uptake d is made in three parts moving
telescopically upon one another. The top portion of the telescopic sleeve is fixed in
the manner herein after described and the lower portions can by means of handles
be raised upon the fixed top portion when access is required to be gained to the
top of the fire box or to the water tubes through the manhole p. The said three
portions of the telescopic sleeve i are made in pieces or segments so that they can
be disconnected and removed through the manhole p for repair or for other purpose.
The bottom of the sleeve i is open and is situated at or about the water level of
the boiler and the top of the said sleeve is partly closed being surrounded by a
conical collar or short tube bolted to the crown of the boiler, Between the said
collar or short tube q and the top of the sleeve i an annular passage r is left,
through which passage steam from the sleeve i escapes into the steam space cas
indicated by the arrows in the enlarged sectional view Figure 4. To the collar or
short tube g the fixed top portion of the sleeve i is bolted as represented.
The outer collar or short tube q besides providing an escape passage for the
steam between it and the top of the sleeve also serves to conduct the water
driven to the top of the sleeve down the outside of the said sleeve, the lower edge
of the said collar or tube being situated a short distance from the outside of the
said sleeve as represented. It will be seen by an examination of Figure 1 that the

page_text: base of the sleeve i is nearly in contact with the sides of the boiler shell whereby
the steam generated at the sides of the fire box is collected in the said sleeve and
the circulation of the water promoted.
As the water tubes e e'; ƒ f'; g g' and h h in the fire box a are heated the
water in them entering into ebullition the mixture of water and steam is projected
into the sleeve i and strikes the uptake or flue d by the heat of which the
suspended particles of water or priming are volatilized and converted into steam,
which escapes by the passage between the top of the sleeve i and the collar q
into the steam space c, any suspended particles of water being conducted to the
outer side of the sleeve in the manner before described. As the uptake dis
deprived of the greater part of its heat by converting the priming into steam the
said uptake is kept comparatively cool and hence is uninjured by the heat and
products of combustion passing through it from the fire box as before explained.
o is a ring between the top of the flue d and the top of the boiler shell. By
means of the said ring the removal of the flue d and fire box is facilitated.
8 is a damper or checkplate suspended by the axial rod t near the entrance to
the uptake d. The position of the said damper is adjusted by the lever u (seen in
Figure 2) jointed to the rod t, the said lever being moved by a handle. By means
of the said damper the flame and heated gases are deflected and made to circulate
about the vertical portions of the water tubes in the fire box a instead of ascending
directly into the uptake d. The said damper also protects the rivet seam by which
the uptake is joined to the crown of the fire box.
Instead of using a conical sleeve as represented a cylindrical sleeve may be
employed and instead of conducting the steam from the sleeve by the annular
passager in communication with the top of the sleeve as described and represented,
the top of the sleeve may be closed and the steam escape under the bottom edge of
the sleeve into the steam space c but I prefer to use the arrangement of parts
represented in the Drawing which I have found very efficient in practice.
Although I have represented a series of four pairs of water tubes combined in
the fire box of the boiler, yet a single pair of such tubes or a greater or less number
of pairs than four or three, four or more single tubes may be employed according
to the size of the boiler or the steam producing capability required in the boiler.
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 of "Improvements in vertical steam boilers"
First. The combination in the fire box or fire space of a vertical boiler of a pair
or a series of pairs of cross water tubes, or a series of single tubes crossing the boiler
nearly in the direction of a diameter, each tube being so curved or bent near its
middle that the lower part is horizontal or nearly so and the upper part is vertical,
the lower horizontal ends of the said tubes opening into the water space of the
boiler at opposite sides and the upper vertical ends opening into the steam space
at or about the water line of the boiler substantially as herein before described and
illustrated in the accompanying Drawings.
Secondly. The combination in the steam space of a vertical boiler, of a conical
or cylindrical sleeve or case surrounding the uptake or flue of the boiler, the upper
ends of the water tubes in the fire space opening into the lower end of the said
sleeve or case, the several parts being constructed and arranged substantially as
and for the purpose herein before described and illustrated in the accompanying
Drawings.