Improvements in or relating to Steam Boilers.
Year: 1890

page_text: Date of Application, 2nd Sept., 1890
Complete Specification Left, 27th Apr., 1891-Accepted, 30th May, 1891
PROVISIONAL SPECIFICATION.
Improvements in or relating to Steam Boilers.
1, JOHANN RÉTHY of Erzsébet körnt 14, Budapest in the Empire of Austria,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has for its object a boiler which differs essentially from boilers
hitherto known in that it does not comprise bent plates (the bend having been
hitherto for the most part of cylindrical form) but straight plates, and having in
the interior either a partial or an entire metal (copper) casing.
The boiler may comprise two plates and a frame, the former being rectangular
and the sides parallel or approximately parallel to one another. Both of these
plates and the frame enclose the space on all sides.
In another arrangement, two surfaces are formed out of one curved plate.
It is evident that the aforesaid parallel boiler plates could only, by a very
considerable thickness in the size, withstand an inward strain, in case they had not
some kind of stiffening. This is therefore obtained by forming the boiler sections
parallel or approximately parallel to each other, and leaving between them only as
many spaces as are absolutely necessary for the products of combustion to circulate
or flow through then, and in order that the spaces between the boiler sections may
be permanently secure, supports are placed between the sections.
The aforesaid spaces are made secure on the one side by frames between the
sections of the boiler or their edges, which frames are provided on one or more of
their sides with openings adapted to let out the products of combustion; on the
other side there are likewise between the sections of the boiler iron plates, by
which the plates of the boiler sections are supported on each side, so that the outer
surfaces of the two outside sections only are to be stiffened, which can be effected
in any desired manner, for instance, by the agency of a cast iron web; it can
however be also effected, for example, by the outer surfaces of the outside sections,
each forming a buckle plate, or those sections might simply be stiffened by means
of iron rods, supports or angle irons, etceteru. It is a matter of indifference in what
way the water and the steam are introduced, and taken away, as also is the arrange-
ment of the furnace. The frames can further be formed out of one or several
pieces of solid cast or wrought iron, or such may be hollow so as to reduce the
weight.
In operation the water is introduced through a pipe, with which pipe the sections
communicate by means of an opening. The exit of the steam on the other hand is
effected by means of a dome. The furnace can be at the side of the boiler, or, in
the case of an upright arrangement, under the boiler, or in the boiler, in so far that
by prolonging both of the outside sections a fire chamber can be formed.
The boiler sections are held together by means of screws, and may be dismounted
in pieces by unscrewing the screws, whereby it becomes easy to free them from
scale or the like. Such cleaning becomes easier owing to the interior of the boiler-
sections having a metal casing, so that the steam, so to say, expands in a metal
bladder, which clings to the walls of the boiler. The casing of this boiler serves
also as a joint in that it is pressed, by the pressure of the steam, on the spaces
between the plate and the framework, and shuts out these spaces. If the interior
of the boiler sections are full of scale, the casing-being only of small value-is
taken out (the scale being also thereby removed) and is replaced by a new one.
the metal casing is only used for effecting a joint, the same is applied all along the
frames in such manner that this metal casing, besides the inner surface of the
If

page_text: frame, covers only the part of the plates bordering on this frame, whilst the other
part of the plate remains uncovered.
Dated this 1st day of September 1890.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Steam Boilers.
I, JOHANN RETHY of Erzsébet körnt 14, Budapest in the Empire of Austria,
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 for its object a boiler which differs essentially from boilers
hitherto known in that it does not comprise bent plates (the bend having been
hitherto for the most part of cylindrical form) but straight or at least mostly
straight plates, and having in the interior either a partial or an entire metal (copper
or brass) casing and merely held together by screw.
Referring to the accompanying sheet of drawings and to the figures and letters
of reference marked thereon,
Figure 1 is a cross section of an element which goes to form a boiler.
Figure 2 is a side view of the same. This is constructed of two plates a a and a
frame, the fortner being rectangular and the sides parallel or approximately
parallel to one another. Both of these plates and the frame enclose the space A on
all sides.
Figure 3 is a section of a similar part of a boiler with this difference that two
surfaces are formed out of one cursed plate e bent in the shape of a Ụ.
r
It is evident that the aforesaid parallel boiler plates aa and ee could only, by a
very considerable thickness in the size, withstand an inward strain, in case they had
not some kind of stiffening. This is therefore obtained by forming the adjoining
boiler sections parallel or approximately parallel to each other, and leaving between
them only as many spaces as are absolutely necessary for the products of com-
bustion to circulate or flow through them, and in order that the spaces between the
boiler sections may be permanently secure, supports are placed between the
sections.
Figures 4, 5 and 6 are respectively vertical sections (at right angles to ench
other) and a horizontal section of a boiler suitable for small businesses, composed
of sections similar to the foregoing.
AA Figures 4 and 5 show the space intended for the reception of the water
and B the spaces between the boiler sections serving for the products of combustion.
The aforesaid spaces are made secure on the one side by frames #g placed
between the sections of the boiler or their edges; on the other side there are
likewise between the sections of the boiler, iron plates by which the plates of the
boiler sections are supported on each side, so that the outer surfaces of the two
outside sections only are to be stiffened, which can be effected in any desired
manner, for instance, by the outer surfaces of the outside sections, being formed of
buckle plates & Figure 13, or those sections might simply he stiffened by means of
iron rods, as in p Figures 4-6 on the drawing supporting rail pp Figure 7 or
angle irons, etcetera.
The frames composing the steam chamber as well as those of the smoke chamber
be made in various ways.
may
In Figures 1, 2 and 3 they are bent out of a square iron b.
In Figures 4, 5, 6, 7 and 10 they are formed of cast or malleable iron rods with
cross bars cut out with cross sections like building girders.
In all these cases both the frames and the plates are perforated to permit of the
rods p passing through them.

page_text: In Figure 8 the frames are formed of flat iron which rests on the screws
traversing the plates, but are not perforated.
In Figure 9 finally the plates themselves are not all perforated, but only as many
as may be necessary to afford the screws the requisite support against bending out.
It is a matter of indifference in what way the water and the steam are introduced,
and taken away, as also is the arrangement of the furnace.
As shown in the drawing, the water is introduced through a sludge and boiler
scale collector D with which the sections communicate by means of openings o o.
The exit of the steam on the other hand is effected by means of a dome C where
the steam enters by means of openings m n. The object of dividing the boiler
sections by a metal tongue e or is to cause a circulation of the water in the
direction of the arrow without feathers (Figure 5) which causes the larger part of
the sludge and boiler scale to be deposited in the cylinder D instead of in the
boiler which former lies at a lower level. The furnace can be at the side of the
boiler, Figure 10 or, in the case of an upright arrangement, under the boiler,
Figures 4, 5 and 6, or in the boiler, in so far that by prolonging both of the outside
sections a fire chamber can be formed.
The boiler sections are held together by means of screws xx and may be
dismounted in pieces by unscrewing the screws, whereby it becomes easy to free
them from scale or the like. Such cleaning becomes easier owing to the interior of
the boiler-sections having a metal casing u Figure 11 so that the steam, so to say,
expands in a metal bladder, which clings to the walls of the boiler. The casing of
this boiler serves also as a joint in that it is pressed, by the pressure of the steam,
on the crevices between the plate and the framework, and closes these crevices. If
the interior of the boiler sections be full of scale, the casing-being only of small
value is taken out (the scale being also thereby removed) and is replaced by a
new one or it may be cleaned and replaced. If the metal casing is only used for
effecting a joint, the same is merely applied all along the frames in such manner
that this metal casing m in Figure 12 besides the inner surface of the frame, covers
only the part of the plates bordering on this frame, whilst the other part of the
plate remains uncovered.
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 :-
1. The improvement in steam boilers, consisting in the employment or arrange-
ment of parallel, or approximately parallel, plates with frames to form containers
or vessels for the water and around which the products of combustion can circulate,
substantially as and in the manner hereinbefore described and shown.
2. In the construction of containers or vessels, substantially as herein before
described and shown, for steam boilers, the employment of an entire or partial
coating of metal for the inside of such containers or vessels for the purpose of
rendering them tight and for enabling the boiler scale to be more easily removed.
3. The general arrangement and construction of steam boilers substantially as
hereinbefore described and shown.
Dated this worn day or
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.