IMPROVEMENTS IN APPARATUS FOR GENERATING STEAM
Year: 1865

page_text: LETTERS PATENT to Johann Tobias Romminger, of Johannisplatz, Dresden,
for the Invention of "IMPROVEMENTS IN APPARATUS FOR GENERATING STEAM."
-A communication from Peter Corfitz Möller, residing at Reudnitzer
Strasse, Leipzig.
Sealed the 11th July 1865, and dated the 20th March 1865.
PROVISIONAL SPECIFICATION left by the said Johann Tobias Romminger
at the Office of the Commissioners of Patents, with his Petition, on
the 20th March 1865.
I, JOHANN TOBIAS ROMMINGER, of Johannisplatz, Dresden, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN APPARATUS FOR
GENERATING STEAM," to be as follows:-
The peculiarity of this steam generator consists in the form and combination
of a series of pipes in order to obtain the greatest possible heating surface
combined with the smallest possible steam generating surface in a given space.
For this purpose I arrange a system of pipes, which by their peculiar shape
do not require the interposition of any heat-absorbing material, the smoke
flue from the fire-grate to the chimney being produced by the form or trans-
verse section given to the pipes. These pipes are made of cast iron, and have
a transverse section of a cross-like form. In some cases, however, the passage

page_text: through these pipes is formed with a lining of wrought metal, which is
introduced into a mould so as to have cast metal run thereon. The ends of
these pipes are connected in such manner as to cause the water which is
forced into the entrance pipe to pass in succession through the whole of the
pipes constituting a series.
Further, I arrange the proportions of the series of pipes in a manner to
produce an even pressure throughout by giving the entrance a smaller size
than the outlet. I introduce metal rods into the pipes in cases where
the water produces sediment, so as to cause by thus narrowing the passage a
greater friction in the passage of the steam, by which means the pipes are
kept clear of sediment, which is carried away by the steam. A hand pump is
used when starting the engine, and another pump is driven by the engine
when at work, so that for each stroke of the engine jets of feed water are
introduced into the entrance pipe of the system, and this water traversing to
and fro through the whole series of pipes issues as steam of high pressure
from the outlet at the opposite end of the series, and it then passes to the
steam cylinder.
In the case of a surplus of steam being generated it will escape through a
safety valve on the steam chamber, where a governor is applied to act on a
valve, which when raised allows a portion of the feed water to pass without
entering the generator until the proper speed of generating steam is again
obtained.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Johann Tobias Romminger in the Great Seal Patent Office
on the 18th September 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHANN
TOBIAS ROMMINGER, of Jobannisplatz, Dresden, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twentieth day of March, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-eighth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Johann Tobias Romminger, Her special licence that I, the said
Johana Tobias Romminger, my executors, administrators, and assigns, or such
others as I, the said Johann Tobias Romminger, my executors, administrators,
and assigns, should at any time agree with, and no others, from time to time
and at all times thereafter during the term therein expressed, should and

page_text: lawfully might make, use, exercise, and vend, within the United Kingdom
of Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "IMPROVEMENTS IN APPARATUS POR GENERATING STEAM," a com-
munication from the Inventor, Peter Corfitz Möller, a person resident at.
Reudnitzer Strasse, Leipzig, upon the condition (amongst others) that the
said Johann Tobias Romminger, my executors or administrators, by an instru-,
ment in writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention, and in
what manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Johann Tobias Romminger, do hereby
declare the nature of the said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say:-
The peculiarity of this steam generator consists in the form and combination
of a series of pipes in order to obtain the greatest possible heating surface
combined with the smallest possible steam generating surface in a given space.
For this purpose I arrange a system of pipes, which by their peculiar shapo
do not require the interposition of any heat-absorbing material, the smoke flue
from the fire-grate to the chimney being produced by the form or transverse
section given to the pipes. These pipes are made of cast iron, and have a
transverse section of a cross-like form. In some cases, however, the passage
through these pipes is formed with a lining of wrought metal, which is intro-
duced into a mould so as to have cast metal run thereon. The ends of these
pipes are connected in such manner as to cause the water which is forced
into the entrance pipe to pass in succession through the whole of the pipes
constituting a series.
Further, I arrange the proportions of the series of pipes in a manner
to produce an even pressure throughout, by giving the entrance a smaller
size than the outlet. I introduce metal rods into the pipes in cases
where the water produces sediment, so as to cause by thus narrowing the
passage a greater friction in the passage of the steam, by which means the
A
pipes are kept clear of sediment, which is carried away by the steam.
hand pump is used when starting the engine, and another pump is driven by
the engine when at work; so that for each stroke of the engine jets of feed
water are introduced into the entrance pipe of the system, and this water
traversing to and fro through the whole series of pipes issues as steam of high

page_text: pressure from the outlet at the opposite end of the series, and it then passes to
the steam cylinder.
In the case of a surplus of steam being generated it will escape through a
safety valve on the steam chamber, where a governor is applied to act on a
valve, which when raised allows a portion of the feed water to pass without
entering the generator until the proper speed of generating steam is again
obtained.
Having thus stated the nature of my said Invention, I will proceed more
fully to describe the manner of performing the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows a longitudinal section; Figure 2 shows a transverse section;
Figure 3 shows a plan in section; Figure 4 shows external longitudinal views
of the forms of the pipes used; and Figure 5 shows transverse sections of
such pipes. Each pipe is of cast iron, and is internally lined with a wrought
tube. Each pipe being made in its transverse section of a cross-like form,
when several are placed together side by side, and others are placed above
them, longitudinal passages or flues are formed horizontally for the passage of
the heat and products of combustion from the furnace; and by the forms of
the ends of the pipes vertical flues or passages are also formed, so that the
heat and products of combustion are caused to pass to and fro along the
horizontal flues, as is indicated by the arrows in Figure 1. In the Drawing
there are two tiers or rows of pipes, but more may be used if desired; these
pipes are by preference to be arranged within a chamber of fire-bricks, which
is cased externally with iron, as is shown in the Drawings, but this may be
varied. At the upper part of the chamber is a reservoir for receiving water
to be heated by the products of combustion after they have passed beyond the
system of pipes constituting the steam generator. The water is first pumped
or forced into the outermost pipe of the upper tier of pipes, from which it is
caused to circulate to and fro in the pipes constituting such upper tier; the
water then passes into the one of the pipes of the lower series of pipes, and
passes to and fro in succession through the pipes constituting such lower series,
and the steam is conveyed away by a steam pipe from the last or outermost
pipe of that series. The pump or apparatus by which the water is supplied
is to be arranged in a suitable manner for supplying such a measure of water
as is required for each stroke of the steam engine, as has before been done in
supplying other arrangements of steam generators constructed of other forms
of pipes or passages.

page_text: The peculiarity of the present Invention consists in the external construction
of the pipes, and in their combined arrangement, whereby flues are formed
between the interior water and steam passages by the coming together of the
pipes themselves as herein described, without the interposition of other
materials.
In witness whereof, I, the said Johann Tobias Romminger, have here-
unto set my hand and seal, this Eleventh day of September, in the
year of our Lord One thousand eight hundred and sixty-five.
JOHANN TOBIAS ROMMINGER. (L.B.)