Improvements in and connected with Combined Steam-engines and Steam-generators.
Year: 1896

page_text: Date of Application, 3rd Mar., 1896
Complete Specification Left, 17th Nov., 1896-Accepted, 23rd Jan., 1897
TROVISIONAL DE MULTICATION.
Improvements in and connected with Combined Steam-engines
and Steam-generators.
I, WILHELM SCHMIDT, of Ballenstedt near The Harz, in the Duchy of Anhalt,
German Empire, Civil Engineer do hereby declare the nature of this invention to
be as follows:-
This invention refers in general to steam-boilers and motors in which both these
parts are continuously rigidly united, and in particular to such combined steam-
boilers and motors in which the cylinder of the latter is either partly or wholly
arranged within the boiler. There are combined steam-boilers and motors in which
the cylinder is arranged within the steam-space of the boiler, and there are other
combined steam-boilers and motors in which the cylinder is arranged within the
way of the fire-gases streaming forth from the furnace of the boiler. Neither of
these arrangements has up to now met with the desired success, in that in the first
case a strong condensation of steam within the cylinder, and consequently a great
loss of power could not be avoided, and in the second arrangement (which was
devised in order to do away with the drawback just mentioned) the cylinder could
not be protected against too strong a heating.
The purpose of iny invention therefore is to overcome said last-named drawback,
too, and moreover to produce a combined steam-boiler and motor, that, first, is able
to yield a very high useful effect, second, requires repairs either not at all or but in
very long intervals, third, need not continually be attended to, and fourth, may be
manufactured at a comparatively very low price; I attain all these objects, first, by
arranging the cylinder of the motor within the interior of the boiler, in such a
manner, that it extends through the boiler water, and reaches with one end into the
way of the fire-gases streaming forth from the furnace of the boiler; second, by
employing the cylinder as a stay for the boiler, in that I connect an outer wall of the
boiler proper with the fire-box; third, by dividing the latter into a furnace proper
and another chamber by means of a fire-bridge that is arranged in the neighbourhood
of the inner end of the cylinder, and carries a hood that protects said end against
too strong an action of the hot gases escaping from said furnace; fourth, by
arranging tubes of the Field type within said other chamber; and, fifth, by
making said inner end of the cylinder exchangeable, as is all more fully described
hereinafter.
In order to make my invention more clear, I refer to the accompanying drawings,
in which similar letters refer to similar parts throughout the different views, and
in which:-
Figure 1 is a vertical section through my improved combined steam-boiler and
motor, and
Figure 2 is another vertical section taken at right angles to the former one.
In the form of construction shown the cylinder d is arranged in a vertical
position within the interior of the boiler proper, and connects the crown a of the
latter with the crown b of the fire-box. The lower end of the cylinder projects
through said crown b, and extends into the way of the fire-gases that stream forth
from the furnace. A fire-bridge we is arranged below the cylinder d d', and divides
the fire-box into two chambers, one of which forms the furnace proper, whereas

page_text: the other contains a number of tubes of the well-known Field type. The fire-bridge w
carries a hood h, that takes around the portion d' of the cylinder, and protects that
portion against too strong an action of the fire-gases, as las already been mentioned
in the preamble. The hot gases escaping from the furnace, and passing over the
fire-bridge we into the other chamber of the fire-box, flow then downwards along the
Field-tubes above mentioned, and escape at the tower ends of said Lubes, so that
these ends are washed by comparatively cold gases, and are thus fully prevented
against being burnt.
Although by the arrangement of the hood the projecting lower end d' of the
cylinder is well protected against too strong an action of the fire-gases, it may yet
be that after a longer period of time said end requires a renewal. To facilitate this
I prefer to make the said end exchangeable, as shown in Fig. 2, in which the
piece is inserted between the cylinder d proper and the crown & of the fire-box
as a separate piece.
In consequence of the cylinder being arranged in the manner described it is
constantly washed by the hot water contained within the boiler, and the portion d'
that is exposed to the action of the fire-gases is thus very effectively cooled, whilst
on the other hand the upper portion of the cylinder can cool down only to the
highest temperature of the steam. The steam entering the portion d' of the
cylinder is instantaneously and perfectly dried therein, and any excessive
condensation of steam within the cylinder proper is fully prevented.
Dated this 2nd day of March 1896
WILHELM SCHMIDT,
By Charles T. Powell,
Agent for the Applicant.
Improvements in and connected with Combined Steam-engines
and Steam-generators.
I, WILHELM SCHMIDT, of Ballenstedt near The Harz, in the Duchy of Anhalt.
German Empire, Civil 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 refers in general to steam-boilers and motors in which both these
parts are continuously rigidly united, and in particular io such combined steam-
boilers and motors in which the cylinder of the latter is either partly or wholly
arranged within the boiler. There are combined steam-boilers and motors in which
the cylinder is arranged within the steam-space of the boiler, and there are other
combined steam-boilers and motors in which the cylinder is arranged within the way
of the fire-guses streaming forth from the furnace of the boiler. Neither of these
arrangements has up to now met with the desired success, in that in the first case
a strong condensation of steam within the eylinder, and consequently a great loss of
power could not be avoided, and in the second arrangement (which was devised in
order to do away with the drawback just mentioned) the cylinder could not be
protected against too strong a heating.
The purpose of my invention therefore is to overcome said last-named drawback,
too, and moreover to produce a combined steam-boiler and motor, thut, first, is able
to yield a very high useful effect, second, requires repairs either not at all or but in
very long intervals, third, need not continually be attended to, and fourth, may be
manufactured at a comparatively very low price; 1 attain all these objects, first, by
arranging the cylinder of the motor within the interior of the boiler, in such a

page_text: manner, that it extends through the boiler water, and reaches with one end into
the way of the fire-gases streaming forth from the furnace of the boiler; second, by
employing the cylinder as a stay for the boiler, in that I connect an outer wall
of the boiler proper with the fire-box; third, by dividing the latter into a furnace
proper and another chamber by means of a fire-bridge that is arranged in the
neighbourhood of the inner end of the cylinder, and carries a hood that protects
said end against too strong an action of the hot gases escaping from sail furnace;
fourth, by arranging tubes of the Field type within said other chamber; and fifth,.
by making said inner end of the cylinder exchangeable, as is all more fully described
hereinafter.
In order to make my invention more clear, I refer to the drawings sent in with
Provisional Application, in which similar letters refer to similar parts throughout the
different views, and in which:
Figure is a vertical section through my improved combined steam-boiler and
motor, and
Figure 2 is another vertical section taken at right angles to the former one.
In the form of construction shown the cylinder d is arranged in a vertical position
within the interior of the boiler proper, and connects the crown a of the latter with
the crown of the fire-box. The lower end of the cylinder projects through said
crown, and extends into the way of the fire-gases that stream forth from the
furnace. A fire-bridge w is arranged below the cylinder d d', and divides the
fire-box into two chambers, one of which forms the furnace proper, whereas the other
contains a number of tubes of the well-known Field-type. The fire-bridge w
carries a hood h, that takes around the portion d' of the cylinder, and protects that
portion against too strong an action of the fire-gases, as has already been mentioned
in the preamble. The hot gases escaping from the furnace, and passing over the
fire-bridge we into the other chamber of the fire-box, flow then downwards along the
Field-tubes above mentioned, and escape at the lower ends of said tubes, so that.
these ends are washed by comparatively cold gases, and are thus fully prevented
against being burnt.
Although by the arrangement of the hood the projecting lower end of the
cylinder is well protected against too strong an action of the fire-gases, it may yet
be that after a longer period of time said end requires a renewal. To facilitate this
I prefer to make the said end exchangeable, as shown in Figure 2, in which the
piece d' is inserted between the cylinder proper and the crown 6 of the fire-box
as a separate piece.
In consequence of the cylinder being arranged in the manner described it is
constantly washed by the hot water contained within the boiler, and the portion d'
that is exposed to the action of the fire-gases is thus very effectively cooled, whilst
on the other hand the upper portion of the cylinder can cool down only to the
highest temperature of the steam. The steam entering the portion d' of the cylinder
is instantaneously and perfectly dried therein, and any excessive condensation of
steam within the cylinder proper is fully prevented.
Having now particularly described and ascertained the nature of this invention,
and in what manner the same is to be performed, I declare that what I
claim is :-
1. A combined steam engine and steam generator having the cylinder of said
engine extending through the boiler water into the heating-space of said generator,
for the purpose as described.
2. A combined steam engine and steam generator of the kind above claimed having
the heating-space divided into two chambers by means of a fire-bridge; one of said
chambers forming the furnace proper, and the other containing tubes of the Field-
type, for the purpose as described.
3. A combined steam-engine and steam generator of the kind claimed under Head I,
in which the inwardly projecting portion of the cylinder is exchangeable, for the
purpose as describe 1.

page_text: 4. A combined steam-engine and steam generator of the kind claimed under Head 1,
in which the cylinder of the engine serves as a stay between the top-plate of the
heating-space and the top-plate of the generator, for the purpose as described.
Dated this 16th day of November 1896.
WILHELM SCHMIDT,
By Charles T. Powell,
Agent for the Applicant.