Year: 1885

page_text: I, AUGUST BACHMEYER, Civil Engineer, residing in Berlin, Prussia, German
Empire, do hereby declare the nature of this invention to be as follows:-
My invention relates to sectional tubular boilers, and its object is to so construct
the individual sections that they may easily be connected together and disconnected,
and further sections added thereto, and to provide the boiler with new means for
obtaining dry steam.
Each section of the boiler consists of one or more vertical rows of inclined tubes
inserted with either end into a tubular box arranged at a right angle to the same.
The box communicating with the lower ends of the tubes, I shall call the box a,
and the one connected to the upper ends I shall terin the box b. Into the box a
the feed water is introduced. To the inner side of the upper portion of the box b
a steam-chamber is attached, and this chamber is in connection with the box a by
means of tubes parallel to the foregoing ones, and which are above the normal
water level, so that they will serve to dry the steam generated. From the box b
tubes of comparatively small diameter extend through the steam-chamber into the
steam drying-tubes (or some of them), so that an annular passage for the steain
will be formed between the walls of the latter and the small or inner tubes. In
consequence of this arrangement the mixture of steain and water rising in the
box b, will pass through the small tubes into the steam drying-tubes, and, ou
arriving at the end of the small tubes, the steam separating from the water, flows
into the said annular passage, where it is freed by evaporation from the remaining
moisture, and thence passes into the steam-chamber, while the water, following the
incline of the tubes, runs back to the box a.
The boxes a of the different sections are put in communication with each other
at the bottom, and the boxes b at the top of the steam-chambers by lateral
apertures; and the boxes of each system are united by means of screw-bolts passed
through suitable lugs or flanges. An additional communication by lateral holes
may be established between the different boxes a for the introduction of a perforated
feed-pipe.
In case the sections of the boiler are made with two or more vertical rows of
tubes, there may be partition-walls in the boxes a and b between the different
rows.

page_text: I, AUGUST BACHMEYER, Civil Engineer, residing in Berlin, Prussia, German
Empire, 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 the class of sectional tubular boilers, in which inclined
water-tubes are inserted with their ends into tubes or boxes placed about at a
right angle to the former, and whereof those being at the lower ends of the tubes,
are connected to the feed-pipe, while into the opposite ones enters the steam
generated in the water-tubes. The object of the invention is to so construct the
individual sections that they may easily be connected together and disconnected,
and further sections added thereto, and to provide the boiler with new means for
obtaining dry steam.
On the annexed sheet of drawings is represented a boiler constructed according
to my invention. Fig. 1 is a longitudinal sectional view, Fig. 2 an end view from
the right-hand side and Fig. 3 a like view from the opposite side.
Each section of the boiler consists of one or more vertical rows of tubes c
inserted with their ends into the walls of the rectangular tubular boxes a and b
that are opposite to each other. In the drawing the said tubes are shown as being
horizontal; but for service the boiler is so erected that the tubes rise from their
feed-end at such an angle that the steam generated therein will freely pass upward
to the higher end. The outer walls of the boxes a and b are provided with holes
through which the tubes are introduced while the boiler is being made and through
which they may be cleaned. These holes are closed in any suitable manner by
covers. The boxes a of the different sections are put in communication with each
other at the bottom, g, so that a common mud-collector and blow-off channel is
thereby formed, and a second communication is established at h for the introduction
of the feed-pipe i, which opens out by means of holes into each of the said boxes.
To the inner side of the upper portion of each box b a steam-chamber is
attached, and this chamber is in connection with the opposite box a by means of
tubes d parallel to the foregoing ones, and which are above the normal water-level.
From the box 6 tubes e of comparatively small diameter extend through the steam-
chamber into the tubes d, so that annular spaces are formed between the walls of
the latter and the tubes & In consequence of this arrangement the mixture of
steam and water rising in the box b will pass through the tubes e into the tubes d,
and on arriving at the end of the tubes e, the steam separating from the water,
flows into the said annular spaces, where it is freed by evaporation from the
remaining moisture and thence passes into the steam-chamber 7, while the water,
following the incline of the tubes, runs back to the box a. For further drying the
steam or for superheating it and for increasing the steam space, tubes may be
arranged above the tubes d.
The steam-chambers of the different sections are put in communication with
each other at m, and to the respective aperture of either of the end-sections the
steam-pipe may be attached.

page_text: The boxes of each series are connected together by screw-bolts passed through
flanges or lugs arranged at the sides of the apertures of communication and at any
other suitable points. At the side of the point of connection h exposed to the fire-
gases, the boxes a are preferably provided upon their whole breadth with sleeves
through which a single long bolt is passed.
The boxes a and b may be made of cast-iron or of any other suitable metal, and,
in case there are two or more rows of tubes in each section they may be provided
with partition-walls between the different rows.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what
I claim is:
A water-tube boiler composed of two or more sections, each of which consists of
the tubular boxes a and b with steam-chamber attached to the box b, of the
inclined water-tubes c connecting the boxes a and b, the inclined steam-drying
tubes d extending from the box a to the chamber 1, and the tubes e projecting
from the box b through the chamber into the tubes d, substantially as and for
the purpose described.