Year: 1888

page_text: I WILHELM SCHMIDT of 8, Plantagen Strasse, Halberstadt, Prussia, Germany,
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 :-
:-
My invention relates to improvements in steam generators, and more especially to
those used for small steam engines. In my invention steam is first generated in a
spiral tube boiler from which it is led through a spiral worm in a second boiler, in
which the water to be evaporated is, and after the steam has traversed the spiral tubes
and evaporated the water in the second boiler it is then led back into the lower part of
the first steam generator to be again heated. By this method the depositing of sludge
is avoided in the boiler and the risk of explosion a minimum.
In order to make my invention more clear I refer to the accompanying drawing,
in which similar letters denote similar parts throughout the different figures.
Figure 1 is a section of my improved steam generator, while figure 2 is a section
through the line a ẞ of the second boiler B.
The coil g, which is heated direct by the fire in the boiler A is connected to the
under part of the steam generator B by the two pipes . The tube is led direct
through the generator to the top and is surrounded with a pipe a², which opens into
the branch c at the bottom, and is connected at its top end with the coil a through
which the steam passes and out by the tube r.
The steam generator B is composed of the two parts and 61, the top 6¹ being easily
removed for the cleaning of the coil etc., the under part b carries the coil a and the
vertical tube a¹ and the tube a², while the top piece 6 carries the usual mountings and
the removable cover d to which the feed apparatus s is fastened, the water being led
to the same through the pipe w.
The working is as follows:
Water is converted into steam in the coil g of the boiler A; the steam passing
through the pipe 1 and pipe a¹ to the coil a which is contained in the steam
generator B, & converts the water in the same into steam by imparting its heat thereto,
and flows off in the form of water through the pipe r back into the boiler A to be
again evaporated and used again.

page_text: The steain which is generated in the generator B must pass down the pipe a² before
it finds an outlet, and it is dried, by the incoming warm steam in the pipe a'.
In order to prevent the depositing of sediment in the generator B and on the
outside of the coil a, and to prevent the taking asunder of the generator when it is
desired to remove the sludge or sediment, the feed water is led into the pipe kk' and
there first warmed before mixing with the water in the generator. The pipe k is simply
placed loose in the generator B, in such a position that the tube k¹ is directly under the
feed water inlet pipe s¹.
The feed water is by this means slowly heated and before it reaches the outlet of the
pipe kit has deposited its solid impurities.
All that is necessary to do when required to remove the sludge from out the
generator B, is to remove the cover. d when the pipes can be withdrawn and
cleaned.
When it is necessary to thoroughly clean the generator B all that is necessary is to
remove the top half 61, without having to remove any of the mountings, when the
pipe can be removed and the high pressure boiler is not required to be disturbed
in the least.
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 1
claim is :
1) A steam generator consisting of the directly heated tubular boiler A and the
indirectly heated steam generator B the upper half of which can be removed substantially
and for the purpose as described.
.
2) In a steam generator the vertical steam pipe a¹ in combination with the coil a in
the generator B the upper half of which can be removed substantially and for the pur-
pose as described.
3) A steam generator consisting of the directly heated boiler A and the indirectly
heated steam generator B, the under part 6 of the generator A which carries the inlet
pipe a¹ and the outlet steam branch c and the outlet pipe r of the coil a and having
the upper part ¹ removable substantially and for the purpose as described.
4) In a steam generator the combination of the pipe a² whose upper end reaches
above the highest water level in the generator B and whose under end is connected to
the steam branch c, with the vertical inlet pipe a¹ of the coil a substantially and fo
the purpose as described.
5) In a steam generator the loose feed water heater kk substantially and for the
purpose as described.

page_text: I WILHELM SCHMIDT of 8, Plantagen Strasse, Halberstadt, Prussia, Germany,
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 :—
My invention relates to improvements in steam generators, and more especially to
those used for small steam engines. In my invention steam is first generated in a
spiral tube boiler from which it is led through a spiral worm in a second boiler, in
which the water to be evaporated is, and after the steam has traversed the spiral tubes
and evaporated the water in the second boiler it is then led back into the lower part of
the first steam generator to be again heated. By this method the depositing of sludge
is avoided in the boiler and the risk of explosion a minimum.
In order to make my invention more clear I refer to the accompanying drawing,
in which similar letters denote similar parts throughout the different figures.
Figure 1 is a section of my improved steam generator, while figure 2 is a section
through the line a ẞ of the second boiler B.
b
The coil g, which is heated direct by the fire in the boiler A is connected to the
under part of the steam generator B by the two pipes. The tube is led direct
through the generator to the top and is surrounded with a pipe a², which opens into
the branch cat the bottom, and is connected at its top end with the coil a through
which the steam passes and out by the tuber.
The steam generator B is composed of the two parts b and b', the top b¹ being easily
removed for the cleaning of the coil etc., the under part 6 carries the coil a and the
vertical tube a¹ and the tube a², while the top piece 6 carries the usual mountings and
the removable cover d to which the feed apparatus s is fastened, the water being led
to the same through the pipe w.
The working is as follows:
Water is converted into steam in the coil g of the boiler A; the steam passing
through the pipe and pipe a¹ to the coil a which is contained in the steam
generator B, & converts the water in the same into steam by imparting its heat thereto,
and flows off in the form of water through the piper back into the boiler A to be
again evaporated and used again.

page_text: The steam which is generated in the generator B must pass down the pipe a² before
it finds an outlet, and it is dried, by the incoming warm steam in the pipe a¹.
In order to prevent the depositing of sediment in the generator B and on the
outside of the coil a, and to prevent the taking asunder of the generator when it is
desired to remove the sludge or sediment, the feed water is led into the pipe k k¹ and
there first warmed before mixing with the water in the generator. The pipe k is simply
placed loose in the generator B, in such a position that the tube ¹ is directly under the
feed water inlet pipe s.
The feed water is by this means slowly heated and before it reaches the outlet of the
pipe kit has deposited its solid impurities.
All that is necessary to do when required. to remove the sludge from out the
generator B, is to remove the cover d when the pipes k¹ can be withdrawn and
cleaned.
When it is necessary to thoroughly clean the generator B all that is necessary is to
remove the top half 6', without having to remove any of the mountings, when the
pipe k k¹ can be removed and the high pressure boiler is not required to be disturbed
in the least.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is:
1) A steam generator consisting of the directly heated tubular boiler A and the
indirectly heated steam generator B the upper half of which can be removed substantially
and for the purpose as described.
2) In a steam generator the vertical steam pipe a¹ in combination with the coil a in
the generator B substantially and for the purpose as described.
3) A steam generator consisting of the directly heated boiler A and the indirectly
heated steam generator B, the under part 6 of the generator A which carries the inlet
pipe a¹ and the outlet steam branch c and the outlet piper of the coil a and having
the upper part & removable substantially and for the purpose as described.
с
4) In a steam generator the combination of the pipe a² whose upper end reaches
above the highest water level in the generator B and whose under end is connected to
the steam branch c, with the vertical inlet pipe a¹ of the coil a substantially and for
the purpose as described.
5) In a steam generator the loose feed water heater &
purpose as described.
substantially and for the