Year: 1899

page_text: I, HEINRICH SIEBERT, of Elbing, in the Kingdom of Prussia, German Empire,
Captain, do hereby declare the nature of this invention to be as follows:-
This invention relates to new and useful improvements in water-tube boilers
and consists of a certain arrangement of parts as fully described hereinafter.
My invention has for its object to provide a new and improved water-tube
boiler of that kind where the chief or principal heating surface is composed of a
plurality of water tubes inclined downwards from front to rear of the boiler.
The lower ends of the tubes communicating with a water cylinder and the upper
ends communicating with a steam cylinder, both cylinders being connected by
one or more inclined circulating stand pipes.
The particular arrangement of parts in a boiler according to my invention has
the object:
1, to attain a good circulation of water,
2, to deliver the steam in a dry state,
3, to add to the safety and durability of the boiler,
4, to allow an easy cleansing of the apparatus.
The construction by means of which this purpose is attained, is the following:
The water-tubes of a boiler according to my invention incline (about 25°) to
the rear, whereby the steam produced within the tubes reaches the steam cylinder
in quite a dry state. The construction of such inclined tubes offers difficulties
in as much as the headers could not be constructed without the one overlapping
the other owing to the insufficient space. It is a special feature of my invention,
that these headers of the water-tubes can be suitably arranged without over-
lapping one another. For this purpose the headers containing the water tubes
are constructed in step form. In order to arrange a great number of tubes of
small diameter within the step-formed headers, each of them carries only a
small number of tubes, say 3 or 4. so that each header contains a group of
water tubes which are separated by a comparatively large space from the following
group of water-tubes.
In this manner a great heating surface. is obtained with only a very small
number of water tubes. The formation of smoke and the deposits of ashes on
the upper sides of the tubes is prevented for the reason that the great inter-
mediate spaces between the different groups of water tubes allow, that the gases
separated by the different tubes unite again, thereby attaining an efficient passing
of the flame round all of the water-tubes.
The different parts of this boiler are arranged so that one wall formed by the
series of leaders is fixed to the steam chamber while the other wall reposes upon
the water-cylinder whereby distortion of the boiler is prevented. Instead of
two series of headers two water legs can advantageously he employed, the outer
wall of which is even, while the inner wall directed to the fire-grate has the
before described step form.

page_text: drawings, in which:
Figure 1 shows a vertical section through the boiler,
Figure 2 illustrates a transverse section through the boiler.
Figure 3 is a horizontal section showing a general view of the draught regula.
tion device,
Figure 4 is detail view of the same,
Figure 5 shows the regulation device in another position.
Figures 6 & 7 show a modified form of construction, corresponding in positions
to those shewn in Figures 4 & 5 respectively.
Figure 8 is a vertical section through a series of headers consisting of several
pieces connected together.
Figure 9 is a transverse section through Figure 8.
In the drawing is a steam-chamber and is the water-cylinder of the boiler.
Both, the steam-chamber and the water-cylinder are connected by one or more
stand-pipes arranged at the side or sides of the boiler or, in long boilers
in the middle of the same. d are the front headers for taking up the water-
tubes, are the rear-headers, fare the water-tubes introduced in the front and
in the rear-headers.
g is a fire-grate arranged in the direction of the water-tubes. The front and
rear head pieces are composed in horizontal direction of series connected together
by means of plugs and in vertical direction, they are formed by one single piece
or composed of several pieces connected together by suitable means (Figures 8
& 9). Each header is provided with lateral ribs in which ribs are bored
recesses i, so that:
1. A smoke-tight wall is formed by the headers and
2. The cleaning of the water tubes can easily be effected from the outside.
As illustrated in the drawings, the boiler is enclosed by a double casing 1,
thus forming the channels m, through which the heated air is conducted to the
openings arranged underneath the fire-grate. Thereby the radiation of heat
from the walls and 7 is utilised within the boiler, and is prevented from passing
to the outside. It is easily to be seen from the drawings that owing to the
inclination of the water tubes f an energetic circulation is attained. The steam
produced within these tubes f owing to their great inclination, tends to escape
as quickly as possible. Therefore the circulation not only will be a very lively
one, but also a good utilisation of the fire and a formation of very dry steam
will be effected.
The header for each group of water tubes is rendered tight by a closing
mechanism arranged at its outside. This mechanism is a very simple one and
clearly represented in Figures 8 & 9. It consists of a disc o having a projecting
ring which enters an annular groove q arranged at the outside of the header.
The tightening of the joint is effected by means of a clamp provided at the
inside of the header and a screw bolts arranged on the outside of the disc o in
any suitable manner. The heating of the boiler as described heretofore is effected
in the ordinary manner, that is to say, the gases flow from the bottom of the boiler
to the top of the same.
A further advantage of great importance is attained by means of my draught
regulating device which enables a uniform heating of all of the water-tubes.
Hitherto the gases were throttled or ejected, but in my invention I check the
gases in their natural course to the chimney, that is to say the gases which
owing to their position, could take the nearest way to the chimney are obliged
to pass a longer way, so as to cause them to pass freely over the whole heating
surface, that is to say over the whole length and breadth of the boiler. They
pass freely and uniformly around each tube throughout its length, whereby the
boiler may have any dimension with respect to the position of the chimney, so
that the whole length of the boiler can be employed for arranging fire-grates.
In this manner large fire-grates can he employed with economical combustion,

page_text: also boilers of extraordinary dimensions having great heating surfaces can be
built, as in spite of the compactness of the boiler a good distribution of the
gases is possible.
Evidently the draught mechanism can be constructed in such manner as to be
capable of regulation. This is effected in the simplest way when the throttling
device checks the gases at the one side more than at the other. Such a device
is illustrated in the accompanying drawing in Figures 3-7.
Figure 3 shows a top view of a water-tube boiler constructed according to my
invention. « is a steam-chamber, the water cylinder and g illustrates the posi-
tion of the fire-grate. f shows the position of the water-tubes lying parallel to
the fire-grate g. is a common chimney; the apertures for the gases preferably
are of trapezoidal form, the smaller ends lying near the chimney. The regulat-
ing mechanism is formed by a plate rigidly connected to the boiler; upon this
plate slides a second plate which can be adjusted by means of screws 8.
Apertures of the form illustrated in the drawing are provided on the plate a.
The plate y has apertures which in form are similar to the apertures of the
plate.r. The position of the plate y can be varied at will by screwing or un-
screwing either both the screws 2 and 3 or one of them. For instance in
Figure the screw is screwed in and the plate y is moved aside so that the
apertures take the position represented. It is quite evident that the position
of this plate y with respect to the lower plate can be regulated at will.
Figure 6 shows a modified form of construction, in which the apertures are not
of trapezoidal form, as represented in Figures 3-5, but of rectangular form.
This modification is only of constructional nature and does not effect the nature
the nature of my invention.
In constructing a boiler in the manner hereinbefore described there are some
great advantages. Firstly owing to the inclination of the tubes two free spaces
are formed which are of great importance for a good action of the boiler, vis.
a free space is formed over the fire-grate whereby a good formation of the
flame is obtained and a complete combustion is effected. The second space is
formed between the water-tubes and the draught regulating mechanism. This
space can be employed for taking up a device for effecting the initial heating
of the water or a superheater, or evidently both arrangements, riz. the mechanism
for effecting the initial heating as well as a superheater can be arranged within
the space between the draught regulating mechanism and the water-tubes.
Dated this 24th day of April 1899.
JENSEN & SON,
77, Chancery Lane, London, W.C., Agent for the Applicant.
Improvements in and connected with Water-tube Boilers.
I, HEINRICH SIEBERT, of Elbing, in the Kingdom of Prussia, German Empire,
Captain, 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 relates to new and useful improvements in water-tube boilers
and consists of a certain arrangement of parts as fully described hereinafter.
My invention has for its object to provide a new and improved water-tube
boiler of that kind where the chief or principal heating surface is composed of a
plurality of water tubes inclined downwards from front to rear of the boiler.

page_text: The lower ends of the tubes communicating with a water
and the upper
ends communicating with a steam cylinder, both cylinders being connected by
one or more inclined circulating stand pipes.
The particular arrangement of parts in a boiler according to my invention has
the object.:
1, to attain a good circulation of water,
2, to deliver the steam in a dry state,
3, to add to the safety and durability of the boiler,
4, to allow an easy cleansing of the apparatus.
The construction by means of which this purpose is attained, is the following:
The water-tubes of a boiler according to my invention incline (about 25°) to
the rear, whereby the steam produced within the tubes reaches the steam cylinder
in quite a dry state. The construction of such inclined tubes offers difficulties
in as much as the headers could not be constructed without the one overlapping
the other owing to the insufficient space. It is a special feature of my invention,
that these headers of the water tubes can be suitably arranged without over-
lapping one another. For this purpose the headers containing the water tubes
are constructed in step form. In order to arrange a great number of tubes of
small diameter within the step-formed headers, each of them carries only a
small number of tubes, say 3 or 4, so that each header contains a group of
water tubes which are separated by a comparatively large space from the following
group of water tubes.
In this manner a great heating surface is obtained with only a very small
number of water tubes. The formation of smoke and the deposit of ashes on
the upper sides of the tubes is prevented because the great intermediate spaces
between the different groups of water tubes allow the gases separated by the
different tubes to unite again, and sufficiently to circulate round all the water-
tubes.
The different parts of this boiler are arranged so that one wall formed by the
series of headers is fixed to the steam chamber while the other wall reposes upon
the water cylinder whereby distortion of the boiler is prevented. Instead of
two series of headers two water legs can advantageously be employed, the outer
wall of which is even, while the inner wall directed to the fire-grate has the
before described step form.
In order to make my invention more clear, I refer to the drawings filed with
the provisional application, in which:
Figure 1 shows a vertical section through the boiler,
Figure 2 illustrates a transverse section through the boiler.
Figure 3 is a horizontal section showing a general view of the draught regula-
tion device,
Figure is detail view of the same,
Figure shows the regulation device in another position.
Figures 6&7 show a modified form of construction, corresponding in position
to those shown in Figures + & 5 respectively.
Figure 8 is a vertical section through a series of headers consisting of several
pieces connected together.
Figure 9 is a transverse section through Figure 8.
In the drawing a is a steam-chamber and is the water-cylinder of the boiler.
Both, the steam-chamber and the water-cylinder are connected by one or more
stand-pipes arranged at the side or sides of the boiler or, in long boilers
in the middle of the same. dare the front headers for taking up the water-
tubes are the rear-headers, f are the water-tubes introduced in the front and
in the rear-headers.
g is a fire-grate arranged in the direction of the water-tubes. The front and
rear head pieces are composed in horizontal direction of series, and arranged in
proximity to each other. and in vertical direction they are formed by one single
piece or composed of several pieces connected together by suitable meang

page_text: (Figures 8 & 9). Each header is provided with lateral ribs h in which ribs are
bored recesses i to receive the plugs i, so that:
1. A smoke-tight wall is formed by the headers, and
2. The cleaning of the water tubes can easily be effected from the outside
through the recesses i arranged between the ribs of each pair of the head-pieces
after the plugs for closing up the recesses have been removed.
As illustrated in the drawings, the boiler is enclosed by a double casing kk'l',
thus forming the channels m, through which the heated air is conducted to the
openings arranged underneath the fire-grate. Thereby the radiation of heat
from the wall and is utilised within the boiler, and is prevented from passing
to the outside. It is easily to be seen from the drawings that owing to the
inclination of the water tubes f an energetic circulation is attained. The steam
produced within these tubes f owing to their great inclination, tends to escape
as quickly as possible. Therefore the circulation not only will be a very lively
one, but also a good utilisation of the fire and a formation of very dry steam
will be effected.
The header for each group of water tubes is rendered tight by a closing
mechanism arranged at its outside. This mechanism is a very simple one and
clearly represented in Figures 8 & 9. It consists of a disc o having a projecting
ring which enters an annular groove arranged at the outside of the header.
The tightening of the joint is effected by means of a clamp r provided at the
inside of the header and a nut s arranged on the outside of the disc o in any
suitable manner. The heating of the boiler, as described heretofore, is effected
in the ordinary manner, that is to say, the gases flow from the bottom of the boiler
to the top of the same.
A further advantage of great importance is attained by means of my draught
regulating device, which enables a uniform heating of all of the water-tubes.
Hitherto the gases were only throttled or ejected, by which means a great loss
of heat could not be avoided. In my invention I check the gases in their
natural course to the chimney by means of my new draught regulating
mechanism hereinafter described. In the latter the apertures, through which
the gases are led to the chimney, are of trapezoidal or other form, being of a
certain width on one extremity and getting contracted at the other end. Evidently
the gases ascending from the fire-grates try to take the shortest way out. This
way would be through the narrower parts of the apertures in the draught regu-
lating mechanism, for according to my new arrangement of the latter the aper-
tures in the same are located so that the narrower parts are directly above the
fire-grates, whereas the wider parts are on the further side thereof. When the
gases have reached these narrow parts of the apertures, they become heaped up
in front of the latter, being not able to escape easily through them. In the
same time the draught draws them to the wider parts of the apertures. The
boiler may have any dimension with respect to the position of the chimney, so
that the whole length of the boiler can be employed for arranging fire-grates.
In this manner large fire-grates can be employed with economical combustion,
also boilers of extraordinary dimensions having great heating-surfaces can be
built, as in spite of the compactness of the boiler a good distribution of the gases
is possible.
Evidently the draught mechanism can be constructed in such manner as to be
capable of regulation. This is effected in the simplest way when the throttling
device checks the gases at the one side more than at the other. Such a device
is illustrated in the drawing in Figures 3-7.
Figure 3 shows a top view of a water-tube boiler constructed according to my
invention. is a steam-chamber, the water cylinder and illustrates the posi-
tion of the fire-grate. f shows the position of the water-tubes lying parallel to
the fire-grate g. is a common chimney; the apertures for the gases preferably
are of trapezoidal form, the smaller ends lying near the chimney. The regulat-
ing mechanism is formed by a plate .r rigidly connected to the boiler; upon this

page_text: plate slides a second plate y which can be adjusted by means of screws
Apertures of the form illustrated in the drawing are provided on the plate.
The plate y has apertures which in form are similar to the apertures of the
plater. The position of the plate y can be varied at will by screwing or un-
screwing either both the screws and or one of them." For instance in
Figure the screw is screwed in and the plate y is moved aside so that the
apertures take the position represented. It is quite evident that the position
of this plate y with respect to the lower plate can be regulated at will.
Figure 6 shows a modified form of construction, in which the apertures are not
of trapezoidal form, as represented in Figures 3-5, but of rectangular form.
This modification is only of constructional nature and does not effect the nature
of my invention.
.
In constructing a boiler in the manner herein before described there are some
great advantages. Firstly owing to the inclination of the tubes two free spaces
are formed which are of great importance for a good action of the boiler, viz.
a free space is formed over the fire-gate g thereby a good formation of the
flame is obtained and a complete combustion is effected. The second space is
formed between the water-tubes and the draught regulating mechanism. This
space can be employed for taking up a device for effecting the initial heating
of the water or a superheater, or evidently both arrangements, riz. the mechanism
for effecting the initial heating as well as a superheater can be arranged within
the space between the draught regulating mechanism and the water-tubes.
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:-
1. In water-tube boilers, the combination of a steam-chamber and a water--
cylinder, with an inclined circulating stand-pipe connecting the steam-chamber
to the water-cylinder, headers taking up a group of water tubes and being
arranged in step form at the front and rear of the boiler, which are formed
vertically of one single piece or several pieces connected together these pieces
being arranged horizontally in proximity to each other, and which form stand-
pipes connecting the steam chamber with the water-cylinder, a draught regulating
mechanism provided at tlie top end of the boiler, substantially and for the purpose
as described.
2. In water-tube boilers, the combination of a steam-chamber (a) with a water-
cylinder (b), a circulating stand pipe (c) connecting these cylinders, water-tubes (f)
arranged in groups strongly inclined within the boiler, step-formed front
headers (d) fixed to the steam-chamber forming vertically one or several pieces
connected together, series of these pieces arranged horizontally in proximity to
each other, forming smoke-tight walls, rear-headers (c) arranged on the water-
cylinder, connected in a manner similar to the front headers, substantially and
for the purpose as described.
3. In water-tube boilers, the combination of a steam-chamber (a) and a water-
cylinder () connected with one or more stand-pipes (c) connecting the two recep-
tacles, headers (d) arranged in step form and provided with ribs (h) having
openings (i) allowing an easy cleansing of the water-tubes, dises (o) with a pro-
jecting ring (1) engaging into grooves (7) provided in the headers, nuts (s) and
clamps () tightening the discs and consequently the headers, substantially and
for the purpose as described.
4. In water-tube boilers, the combination of a steam-chamber (a), with a water
cylinder (b), one or more transverse stand pipes (e) connecting the two cylinders,
water-tubes (f) arranged in groups strongly inclined within the boiler, front and
rear headers (d c) arranged in step-form, mantles (kk) surrounding the
boiler, and forming a channel (m) conducting the air underneath the fire-grate
through openings (n), a plate (r) fixed to the top end of the boiler, provided with
openings (c) in trapezoidal or other suitable form, a plate (y) resting upon said

page_text: plate (r). openings (¹) in form similar to (), provided in said plate (y),
screws (3) for altering the position of the plate (y) thus regulating the draft,
for the purpose and substantially as described.
Dated this 22nd day of January 1900.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.