Year: 1897

page_text: I, ADOLPHE FRANCOIS EUGÈNE DUPONT, of Rue Sandin, Toulon sur mer, in the
Republic of France, Engineer, do hereby claim the nature of this Invention to be
as follows:-
-
The arrangement of multitubular boiler or steam generator according to my
Invention consists in a grouping and combination of elements, each element being
composed of two comparatively large vertical or inclined tubes, the one descending
from an upper collector or water and steam vessel and the other rising from a
lower collector or water vessel, and of inclined vapourizing tubes passing through
the combustion chamber or heating space and connecting the said descending
and rising tubes.
The upper collector constituting a steam reservoir is placed above the boiler and
contains water in its lower part. It may he placed out of contact with the products
of combustion or it may be enclosed in the smoke box in the midst of the hot gases
from the furnace in which case the communicating tubes will be bent accordingly.
A vertical or inclined circulating pipe or two or more vertical or inclined circu-
lating pipes lead the water from the upper collector to the lower collector.
I may use in each element, that is in connection with each pair of tubes one
series or any number of series of vapourizing tubes. If two series be used for
example the series formed by the tubes on the one side cross the series formed by
the tubes on the other side.
The tubes may be connected in any suitable way for example each tube may be
composed of two lengths united by a box which may be provided with inspection
orifices. These boxes may be formed so that they can be housed compactly
together and they may have one large cover or separate openings and doors to give
access to the tubes. The tubes rising and descending from the collectors may be
connected to the said collectors by means of flanges secured to corresponding
flanged openings on the collectors and they also may be provided with inspection
orifices.
With this arrangement inspection, cleaning and stopping, and removal and
replacing of the tubes are very readily performed, and the dismounting and entire
removal of an element composed of a rising tube and a descending tube and of the
vapourizing tubes in connection therewith and their connecting boxes can be
readily performed.
The boiler acts as follows:-The feed water and the water not vapourized
descend from the upper collector by the aforesaid circulating pipes into the lower
collector from which it rises into the ascending tubes and passes through the
vapourizing tubes. The mixture of water and vapour then passes by the descending
tubes into the upper collector and thus completes its circulation.
It will be evident that the Invention is not limited to the precise details
described as they may be varied to suit circumstances and that the Invention may

page_text: be applied to boilers or generators with any description of tubes, plain or ribbed,
and that the junctions or connections may be of any suitable description.
Dated this 6th day of July 1897.
JOHNSONS & WILLCOX
47 Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Water-tube Steam Generators or Boilers.
I, ADOLPITE FRANCOIS EUGENE DUPONT, of Rue Sandin, Toulon sur mer, in the
Republic of France, 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:
The arrangement of multitubular boiler or steam generator according to my
invention consists in a grouping and combination of elements each element being
composed of two comparatively large vertical or inclined tubes the one descending
from an upper collector or water and steam vessel and the other rising from a lower
collector or water vessel, and of inclined vapourizing tubes passing through the
combustion chamber or heating space and connecting the said descending and
rising tubes.
In order that my invention may be well understood I will describe it with refer-
ence to the accompanying drawings.
Figure 1 is a vertical section of a boiler constructed according to my invention
the section being taken on the line M N, Figure 3.
Figure 2 shews at a an elevation of part of the boiler, at ẞ a vertical section
of another part, the section being taken on the line ABCD, Figures 1 and 3,
at a vertical section of another part the section being taken on the line EF,
Figures 1 and 3, and at 8 a vertical section of another part the section being taken
on the line GH, Figures 1 and 3.
Figure 3 shews at the part a a horizontal section of part of the boiler on the
line IJ, Figure 1 and at the part a horizontal section of another part of the
boiler on the line KL, Figure 1 the part y of Figure 3 shewing a plan of another
part of the boiler.
Figures 4 to 9 shew details of the vapourizing tubes and their connection with
the aforesaid descending and rising tubes the one conducting the water into the
tubes and the other carrying the products of vapourization to the upper collector.
In the arrangement represented it. is presumed that there are two series of
vapourizing tubes for each pair of vertical tubes. Figure 4 represents a vapouriz-
ing tube of one set extending at S from the rising tube R crossing at an upward
angle the furnace or heating space and then re-crossing it. at U at an upward
angle and entering the descending tube V.
Figure 5 shews parts of the tubes RV with the openings a and c for the reception
of the tubes S and U.
Figure 6 shews an end view of the box that connects the two parts S and U of
the vapourizing tube a similar box connecting the tubes S¹ and U¹.
Figure 7 shews a vapourizing tube of the other set similarly crossing the furnace
or heating space at $1 and U₁, and Figure 8 shews the tubes R and V perforated
for the reception of the tubes S¹ and U¹.
Figure 9 is a plan shewing the position of the series of vapourizing tubes SU
and S¹ U¹.
Figure 10 shews an arrangement of the boxes T which may be used when each
pair of tubes RV carries a large number of series of vapourizing tubes in close
proximity.

page_text: Figure 11 shews the insertion of the tubes in the box in this arrangement it
representing the box open and its cover near it in full lines and in place in dotted
lines.
This cover may be replaced by a fixed cover secured to the box and provided
with openings and doors to give access to the tubes.
In the drawing the same letters denote the same parts in all the figures. Z is
the ashpit door, Y is the door of the furnace X adapted to burn charcoal, coke,
wood, petroleum, or any other fuel.
O is the upper collector constituting a steam reservoir placed above the boiler
and containing water in its lower part. It may be placed out of contact with the
products of combustion as shewn in the drawing or it may be enclosed in the smoke-
box in the midst of the hot gases from the furnace in which case the communicating
tubes will be bent accordingly.
A vertical or inclined circulating pipe or two or more vertical or inclined circu-
lating pipes P lead the water from the upper collector to the lower collector Q.
From the collector the nipes V descend and from the collector Q the pipes R
rise and these pipes are in communication by the vapourizing tubes SU and S¹ U¹
crossing the furnace or heating space.
The water is vapourized in its passage in these pipes S U and S¹ U¹, and the
mixture of water and vapour that is produced passes by the tubes V into the upper
collector 0.
I may use in each element that is in connection with each pair of tubes R and V
one series, or any number of series, of vapourizing tubes.
The drawing shews an arrangement in which two series are used. In this case
the series formed by the tubes on the one side cross the series formed by the tubes
on the other side as shewn clearly in the drawings.
The tubes may be connected in any suitable way. In the arrangement illus-
trated each tube is composed of two lengths one S and S¹ and the other U and U1
united by the box T which may he provided with inspection orifices. These
boxes may be formed so that they can be housed compactly together and they may
have one large cover or separate openings and doors to give access to the tubes.
The tubes R and V may be connected to the said collectors by means of flanges
secured to corresponding flanged openings in the collectors Q and O and they also
may be provided with inspection orifices.
With this arrangement inspection, cleaning and stopping and removal and
replacing of the tubes are very readily performed and the dismounting and entire
removal of an element composed of a rising tube R and a descending tube V and
of the vapourizing tubes in connection therewith and their connecting boxes can
also be readily performed.
The boiler acts as follows. The feed water and the water not vanourized descend
from the upper collector by the aforesaid circulating pipes P into the lower
collector Q from which it rises into the ascending tubes R and passes through the
rapourizing tubes SU and S1 U¹. The mixture of water and vapour then passes
by the depending tubes V into the upper collector O and this completes its
circulation
It will be evident that the invention is not limited to the precise details described
as they may be varied to suit circumstances and that the invention may be applied
to boilers or generators with any description of tubes plain or ribbed and of tubes
in two branches of unequal calibre the lower branch being of smaller calibre
than is the upper branch, and that the junction's or connections may be of any
suitable description.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
In the construction of multitubular boilers the connection of an upper collector
and a lower collector by means of elements each formed of two tubes in juxta-

page_text: position and descending from the one collector and rising from the other and
connected by vapourizing tubes passing from the one tube through the furnace
or heating space and returning through the same to the other tube the rising
tubes connected with the lower collector supplying the water to the said vapour-
izing tubes and the depending tubes in connection with the upper collector
supplying the mixture of water and steam which has been formed in the vapourizing
tubes to the upper collector the upper and lower collectors being connected by a
return passage or return passages for water all substantially as hereinbefore
described and illustrated in the accompanying drawings.
Dated this 5th day of October 1897
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.