IMPROVE- MENTS IN STEAM GENERATORS
Year: 1881

page_text: LETTERS PATENT to Charles Denton Abel, of No. 28, Southampton Buildings,
Chancery Lane, in the County of Middlesex, for an Invention of "IMPROVE-
MENTS IN STEAM GENERATORS." A communication from abroad by Hermann
Schulte, of Stevrermühl. in the Austrian Empire.
PROVISIONAL SPECIFICATION left by the said Charles Denton Abel at the
Office of the Commissioners of Patents on the 7th November 1881.
[
CHARLES DENTON ABEL, of No. 28, Southampton Buildings, Chancery Lane, in
the County of Middlesex. IMPROVEMENTS IN STEAM GENERATORS." [A com-
munication from abroad by Hermann Schulte, of Steyrermühl, in the Austrian
Empire.]
"
This Invention relates to a construction of steam generator known as the
Tenbrink boiler," in which a horizontal cylindrical chamber is connected by a
branch on its top side with an upper cylindrical chamber, so that the steam from
the former rises into the latter, while the furnace is situated in a steeply inclined
position within a correspondingly inclined transverse flue in the lower chamber,
round the entire outer surface of which the flames and hot gases are made to
play. With this construction of boiler a space extending along the entire length
of the top side or crown of the lower cylindrical chamber is occupied by steam,
and consequently the part of the cylindrical shell covering that space becomes
rapidly burnt through by the flames passing over it. The present Invention has
for its object to obviate this defect by restricting the steam space of the lower
chamber to a comparatively small portion of the crown thereof, for which purpose,
instead of making the chamber cylindrical as heretofore, it is constructed with one
portion or two parts thereof extending higher than the main part of the crown,
and connecting the branch leading to the upper chamber at such raised portion or
portions. This may be effected either by making the shell of a somewhat greater
diameter at the middle of its length than at the ends, or by making it larger at
one or both ends than at the middle, so that the whole of the crown can be filled

page_text: with water except such raised part into which the steam generated in the other
parts rises. Furthermore, instead of making the transverse flue containing the
fire grate at so steep an inclination that the upper edge thereof is situated at the
top of the crown, the flue and fire grate are made less inclined, so that the top
edge of the flue shall be some distance below the top of the crown, and conse-
quently being always covered with water, it will not be so liable to be burnt
through. In the construction of such generators employed by preference the shell
is made of somewhat larger diameter in the middle than at the ends, and is
provided with two inclined transverse flues with fire grates, one situated on each
side of the mid-ile portion. The upper chamber is connected by a branch to the
crown of the lower chamber at the said middle part, and the water is led from
the former into the latter by a pipe leading to near the bottom of the lower
chamber.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Denton Abel in the Great Seal Patent Office on the
26th April 1882.
CHARLES DENTON ABEL, of No. 28, Southampton Buildings, Chancery Lane, in
the County of Middlesex. "IMPROVEMENTS IN STEAM GENERATORS."
A com-
munication from abroad by Hermann Schulte, of Steyrermühl, in the Austrian
Empire.
"
This Invention relates to a construction of steam generator known as the
Tenbrink boiler," in which a horizontal cylindrical chamber is connected by a
branch on its top side with an upper cylindrical chamber, so that the steam from
the former rises into the latter, while the furnace is situated in a steeply inclined
position within a correspondingly inclined transverse flue in the lower chamber,
round the entire outer surface of which the flames and hot gases are made to play.
With this construction of boiler a space extending along the entire length of the
top side or crown of the lower cylindrical chamber is occupied by steam, and
consequently the part of the cylindrical shell covering that space becomes rapidly
burnt through by the flames passing over it. The present Invention has for its
object to obviate this defect by restricting the steam space of the lower chamber
to a comparatively small portion of the crown thereof, for which purpose, instead
of making the chamber cylindrical as heretofore, it is constructed with one portion,
or two parts thereof extending higher than the main part of the crown, and
connecting the branch leading to the upper chamber at such raised portion or
portions. This may be effected either by making the shell of a somewhat greater
diameter at the middle of its length than at the ends, or by making it larger at
one or both ends than at the middle, so that the whole of the crown can be filled
with water except such raised part into which the steam generated in the other
parts rises. Furthermore, instead of making the transverse flue containing the
fire grate at so steep an inclination that the upper edge thereof is situated at the
top of the crown, the flue and fire grate are made less inclined so that the top
edge of the flue shall be some distance below the top of the crown, and couse-
quently being always covered with water it will not be so liable to be burnt
through. In the construction of such generators employed by preference the shell
is made of somewhat larger diameter in the middle than at the ends, and is
provided with two inclined transverse flues with fire grates, one situated on each
side of the middle portion. The upper chamber is connected by a branch to the
crown of the lower chamber at the said middle part, and the water is led from
the former into the latter by a pipe leading to near the bottom of the lower
Figs. 1, 2, 3 and 4 of the accompanying Drawings shew various forms of the
"Tenbrink" boiler constructed according to the above described Invention. Fig. 1
shews the simplest construction, the shell being formed of two conical frusta meeting
at the middle, forming a raised part a at that point, into which the steam rises from
the sides, and from which it is conducted to the upper chamber by the pipe B.
Figs. 2 and 3 shew modified forms of the same arrangement, while at Fig. 4 the
conical frusta are connected in the reverse position to that in Fig. 1, so as to form
a raised portion a, a, at each end, constituting two steam chambers, from each of
which the steam is led off by a pipe B. Fig. 5 shews the arrangement of the

page_text: .
transverse flue as heretofore employed with the upper edge of the flue in the axial
line of the boiler, and consequently uncovered by water. Fig. 6 shews the
improved arrangement with flue placed at a less incline, so that the point f comes
somewhat below the axial line. Figs 7 and 8 shew respectively a cross section and
a longitudinal section on line x, y, of the general arrangement of the above described
improved boiler. The water is supplied to the boiler A by the feed pipe C from
the cylindrical upper chamber D. Two transverse flues E are provided, one on
each side of the centre line of the boiler, and the steam generated rises from either
side to the highest central part B, whence it escapes through the pipe into the
upper chamber. The whole of the Tenbrink boiler A is by this arrangement
covered internally by water.
Having thus described the nature of this Invention, and in what manner the
same is to be performed, as communicated to me by my foreign correspondent, I
claim,―
First. Constructing "Tenbrink" boilers of a larger diameter at the middle than
at the ends, and providing a branch pipe at such enlarged part for leading off the
steam, substantially as herein described.
Second. Constructing "Tenbrink" boilers of a larger diameter at the ends than
at the middle, and providing at the enlarged ends branch pipes for leading off the
steam.
Third. The combined arrangement of the " Tenbrink" boiler A with two
transverse firing flues E, and connected at B by a pipe with the upper
chamber D, substantially as herein described with reference to Figs. 7 and 8 of the
Drawings.
In witness whereof, I,_the_said Charles_Denton Abel, have hereunto set my
hand and seal, this Twenty sixth day of April, in the year of our Lord
One thousand eight hundred and eighty two.