Year: 1886

page_text: I WILHELM SCHMIDT, of No. 48 Leonard Strasse, Brunswick in the Empire of
Germany, Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
The improvements hereinafter described and represented by the accompanying
drawings relate to the combination of a tubular heating apparatus or boiler with
an ordinary boiler serving as a reservoir for the purpose of constantly feeding the
boiler and supplying same with water previously freed from sediment.
Figs. I and II show two different modifications of this combination of a tubular
heating apparatus with a reservoir feeding the former through an injector.
In Fig. I, r is the tubular apparatus connected by tubes 71, ll provided with
feeding valves, r, with the reservoir d so, that one of the tubes terminates in
the steam chamber and the other in the water receptacle of the reservoir.
The steam conduit serves to receive the injector nozzle i and is provided with
a steam outlet cock h. The injector is fed with water through the pipe o, which
may be cooled by a cold-water jacket b and terminates in the worm 8 and tube 8¹.
and is connected at p with the reservoir. The reservoir d is fed intermittently
through a pump etc.
The working is as follows:-The tube system rd being heated and under steam
pressure, first the outlet cock h is opened; the steam flowing out of the injector
Bucks up the water from the reservoir, cooled on its way through jacket 6 and
when subsequently the outlet cock h is closed forces the same into the upper part
of the tubular apparatus.
.
A mixture of water and steam or pure steam flows out through the tube ll
opens the feeding valve and proceeds through the tube a provided with small
perforations to the reservoir d, in which the steam separates from the water, at the
same time heating the water in the reservoir d.
The cold feed water for the reservoir d is introduced through tube z and is
slowly heated by the injector water running down through tube 8 and worm 8
(which latter is itself cooled thereby) and, rising, is gradually heated, until it boils,
deposita its sediment and enters the tubes at p as pure water for feeding the
injector.

page_text: The cold feed water, is therefore.first heated and subsequently made to boil, for
the purpose of depositing all its sediment; subsequently it is cooled again to allow
it to act on the steam of the injector.
Fig. II shows a modification only differing from that shown by Fig. I by the
reservoir d also being heated. The rest of the arrangement is the same and also
the same letters are used for the corresponding parts.
The beating of the tubular apparatus r and of the reservoir d is performed in
the usual manner; the flames pass first through the tubes and subsequently play
about the worm b. As indicated by dotted lines in Fig. II (tube y) the steam
generated in the tubular apparatus rb and leaving the same through the tube ll
may also be conducted directly to the cylinder of an engine for the purpose of
being utilized as motive power, without returning the generated steam into the
reservoir; the water may be separated from the steam. Likewise a different
pressure may prevail in the two reservoirs d and b; in this case, of course, a
higher pressure is produced in the tubular apparatus, whereby the injector, by
conducting the water into the tubular apparatus, has to overcome the differential
pressure.
The combination represented by Fig. III is characterised by the reservoir boiler
being provided, by heating, with a higher pressure than the tubular apparatus and
the water chamber of the reservoir boiler so connected with the tubular apparatus
that by the higher pressure in the reservoir the water is continually driven
through the same.
The reservoir boiler may, of course, be heated by fire or by steam; in the latter
case the steam generated in the tubular apparatus, may be suitably used for
heating the reservoir boiler, as shown in three modifications by the drawing.
Fig. III shows the steam heating contrivance contained completely in the water
chamber of the reservoir-boiler; in Fig. IV a part of the steam heating contrivance
is placed into the steam or air chamber of the reservoir-boiler.
The arrangement consists of the tubular apparatus r, into which the water is
driven from out the reservoir boiler K through the tube h, whereupon it is when
running down converted into steam, which leaves superheated the tube 1, 1ª.
This superheated steam, for the production of which the spiral boiler is par-
ticularly constructed fills the two tubes and 11; the tube is conducted through
the water receptacle of the reservoir boiler K, heats the same and subsequently
the steam is condensed in the receptacle T, the tube l' enters a vessel G (Fig. 3)
separate from the reservoir boiler, the steam plays about the worm communicating
with the water and steam chamber of the reservoir and heats the water contained
therein.
The steam-outlet of the vessel G is situated at J.
The water proceeds from the reservoir to the tubular apparatus as follows:-
The reservoir is fed through the; tube y by means of a pump injector or the like;
the entering cold water is heated in some measure, when rising, by the spiral 8 and
passing the latter, enters the reservoir K.
K
The heated water of the reservoir K enters the tube m for feeding the tubular
apparatus and runs through the spiral s where it is cooled to the tube m' and
thence to the tubular apparatus, by which time feed water has deposited all its
sediment.
The above described combination of a tubular apparatus with a boiler or
receptacle heated by the steam generated in the former has the effect that the
pressing of the feed water through the tabular apparatus is regulated automatically
with the generation of steam therein, that is to say the more the steam generated
in the tubular apparatus is superheated, the more forcibly is the water driven
through.
Thus the tubular apparatus is protected from being destroyed by the fire and by
the stronger pressure of the water, the superheating is diminished.

page_text: Naturally the steam pressure in the boiler system changes according to the state
of the fire; but the main purpose however, that is the protection of the tubular
heating apparatus, is attained.
•
The changeable pressure may also be obviated in other manner by insertion of a
heat reservoir into the tube conduit P..
L'
1
This result is obtained without the action of injectors. or pumps, which was
bitherto indispensable and proved always unreliable.
The aforementioned action of the superheated steam may also be performed by
the non-superheated steam of the tubular apparatus by leading the conduit (*
through the air or steam chamber D of the reservoir boiler K, as shown by Fig. IV,
and thus cause the air in D to be influenced by the temperature of this steam
conduit
•
It is not necessary to raise the water in the reservoir K to a high temperature if
only the air in the chamber D saturating itself with steam, is heated and thus
gives the necessary pressure in the reservoir K for forcing the water through the
tubular apparatus.
By this arrangement of the heating contrivance a high pressure can be produced
in the air chamber without a too high temperature.
ī
Fig. IV comprises a device, which is also applicable to Fig. IIL This is the
separation of air from the feed water entering at y. This indispensable-separation
of air is effected by heating the feed water rising in the receptacle the "air
accumulating in the air chamber b, from which it may be allowed to escape at
intervals.
The heated water however proceeds through the elbow n into the reservoir
boiler K.
1.
As shown, the tube conduit m¹ h may be arranged to be adjustably opened and
closed by a cock g.
ין
As shown in Fig. V, the worm e may pass through the water as well as through
the steam in the reservoir. In this case therefore the worm has a double heating
effect.
Dated this 20th day of March 1886

page_text: Improvements in Boilers and Apparatus Connected therewith.
I, WILHELM SCHMIDT of No. 48, Leonard Strasse, Brunswick, in the Empire of
Germany, 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 :—
The improvements hereinafter described relate to the combination of a multi-
tubular heating apparatus or boiler with an ordinary boiler serving as a reservoir
for the purpose of constantly feeding the tubular boiler and supplying same with
water previously freed from sediment.
Referring to the drawings filed with my provisional specification, Figs. I and II
show two different modifications of this combination of a tubular heating apparatus
with a reservoir feeding the former through an injector.
.
In Fig. I, r is the tubular apparatus connected by tubes 11, provided with
feeding valves, with the reservoir d so that one of the tubes terminates in the
steam chamber and the other in the water receptacle of the said reservoir.
The steam pipe „serves to receive the injector nozzle i and is provided with a
steam outlet cock h. The injector is fed with water through the pipe o, which
may be cooled by a cold-water jacket b and terminates in the worm s and tube 8¹
opening at p into the reservoir d. The reservoir d is fed intermittently through a
pump or the like.
The working is as follows: The system.rd being heated and under steam
pressure, first the outlet-cock his opened; the steam flowing out of the injector
sucks up the water, from the reservoir, cooled on its way through jacket b and
when subsequently the outlet cock h is closed, forces the same into the upper part
of the tubular apparatus.
A mixture of water and steam or pure steam flows out through the tube rs,
opens the feeding valve 7 and proceeds through the tube a provided with small
perforations, to the reservoir d, in which the steam separates from the water, at
the same time heating the water in the reservoir d.
The cold feed water for the reservoir d is introduced through tube x, and is
slowly heated by the feed water for the injector passing down through tube 8¹ and
worms (which latter is itself cooled thereby) and rising, is gradually heated, until
it boils, deposits its sediment and enters the tube s¹ at p as pure water for feeding
the injector.
The cold feed water is therefore first heated and subsequently made to boil, for
the purpose of depositing all its sediment and subsequently it is cooled again to
allow it to act on the steam of the injector.
Fig. I shows a modification only differing from that shown in Fig. I by the
reservoir d also being heated. The rest of the arrangement is the same and also
the same letters are used for the corresponding parts.
The heating of the tubular apparatus r and of the reservoir d is performed in
the usual manner; the flames pass first through the tubes and subsequently heat
the worm b.
As indicated by dotted lines in Fig. II the steam generated in the tubular
apparatus rb and leaving the same through the tube may also be conducted
direct to the cylinder of an engine for the purpose of being utilized as motive.

page_text: power, without returning the generated steam into the reservoir; the water may
be separated from the steam. Likewise a different pressure may prevail in the
two reservoirs d and b; in this case, of course, a higher pressure is produced in
the tubular apparatus, whereby the injector, by conducting the water into the
tubular apparatus, has to overcome the differential pressure.
The combination represented by Fig. III is characterised by the reservoir boiler
being provided by heating, with a higher pressure than the tubular apparatus and
the water chamber of the reservoir boiler so connected with the tubular apparatus
that by the bigher pressure in the reservoir the water is continually driven through
the same.
The reservoir boiler may, of course, be heated by fire or by steam; in the latter
case the steam generated in the tubular apparatus, may be suitably used for
heating the reservoir-boiler, as shown in three modifications by the drawing.
Fig. III shows the steam heating contrivance contained completely in the water of
the reservoir-boiler; in Fig. IV a part of the steam heating contrivance is placed
above the level of the water in the said reservoir-boiler.
The arrangement consists of the tubular apparatus R, into which the water is
driven from out the reservoir boiler K through the tube h and in which it passes
downwards and is converted into steam, which leaves through the tubes .
This superheated steam, for the production of which the spiral boiler is
particularly constructed, fills the two tubes 11 and ; the tube is conducted
through the water receptacle of the reservoir boiler K, heats the same and sub-
sequently the steam is condensed in the receptacle T; the tube enters a vessel G,
(Fig. 3) separate from the reservoir boiler, the steam plays about the worm p com-
municating with the water- and steam-chamber of the reservoir and heats the
water contained therein.
The steam-outlet of the vessel G is situated at z.
The water proceeds from the reservoir to the tubular apparatus as follows:
The reservoir is fed through the tube y by means of a pump injector or the like;
the entering cold water is heated in some measure, when rising by the spiral 8 and
passing the latter, enters the reservoir K.
The heated water of the reservoir K enters the tube m for feeding the tubular
apparatus, and runs through the spirals where it is cooled, to the tube m¹ and
thence to the tubular apparatus, by which time the feed water has deposited all its
sediment.
The above described combination of a tubular apparatus with a boiler or
receptacle heated by the steam generated in the former has the effect, that the
pressure on the feed water passing through the tubular apparatus is regulated
automatically with the generation of steam therein, that is to say the more the
steam generated in the tubular apparatus is superheated, the more forcibly is the
water driven through.
Thus the tubular apparatus is protected from being destroyed by the fire and
by the stronger pressure of the water and the superheating thereof is diminished.
The steam pressure in the boiler system changes according to the state of the fire;
but the main purpose that the protection of the tubular apparatus is attained.
The changeable pressure may also be obviated in other manner by insertion of
a heat-reservoir into the pipe -This result is obtained without the action of
injectors or pumps hitherto indispensable which prove always unreliable.
The aforementioned action of the superheated steam may also be performed by
the non-superheated steam of the tubular apparatus by leading the pipe through
the air- or steam-chamber D of the reservoir boiler K, as shown by Fig. IV, and
thus cause the steam or air in D to be influenced by the temperature of the steam
from l*.
It is not necessary to raise the water in the reservoir K to a high temperature,
if only the air in the chamber D saturating itself with steam, is heated and thus
gives the necessary pressure in the reservoir K. for forcing the water through the
tubular apparatus,

page_text: in tubular pollers:
1.) The tubular heating apparatus rb in combination with the reservoir d, from
which water is fed to the tubes b by means of an injector and into which
reservoir the steam is returned through the pipera for the heating of said reservoir d
substantially as described and illustrated.
.
2.) The tubular heating apparatus rb in combination with the reservoir d and
injector for feeding the said apparatus b from the reservoir d, the steam from
the apparatus b being applied direct for the performance of work by tube
3.) The tubular heating apparatus r. b reservoir d and injector i in combination
with the tubes and worm s arranged near the cold water inlet c for the purpose
of cooling the water for feeding the injector i substantially as illustrated and
described.
4.) In the apparatus described in claim 1), the arrangement for heating the
reservoir d and tubes b substantially as illustrated and described.
5.) The combination of the tubular apparatus R and reservoir K with tube m¹ h
for feeding the tubular apparatus R and tubes for returning the steam from
the said apparatus for the heating of the reservoir K substantially as illustrated
and described.
6.) With the apparatus described in claim 5) the spiral p communicating with
the chamber K and arranged in the receptacle G heated by the steam from the
pipe substantially as described.
7.) In combination with the apparatus described in claim 5) the worm 8 com-
municating with the pipe m¹ and arranged near the cold water inlet y, substantially
as illustrated and described.
8.) In combination with the apparatus described in claim 5) the worm e com-
municating with the pipe substantially as described.
9.) In combination with the apparatus described in claim 5) the air receptacle b
arranged above the inlet y substantially as shown and described with reference to
Fig. 4 and for the purpose set forth.
10.) In combination with the above mentioned apparatus, the various modi-
fications and accessories substantially as described and shown in Figs. 1 to 5 of the
drawings.
Dated this 27th day of November 188€