IMPROVEMENTS IN STEAM BOILERS
Year: 1879

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, of the Firm of
J. Brandt and C. W. v. Nawrocki, of 124, Leipzigerstrasse, Berlin, Germany,
Patent Agent, for the Invention of "IMPROVEMENTS IN STEAM BOILERS."
A communication from Jacob Göhring, of Frankenthal, in the Rheinpfalz,
Germany.
Sealed the 2nd April 1880, and dated the 3rd October 1879.
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 3rd
October 1879.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W.
v. Nawrocki, of 124, Leipzigerstrasse, Berlin, Germany, Patent Agent. "IMPROVE-
MENTS IN STEAM BOILERS." (A communication from Jacob Göhring, of Frankenthal,
in the Rheinpfalz, Germany.)
This Invention refers to a peculiar steam boiler construction with smoke preventing
fireplace and adjustable slanting grate. As applied to a so-called French boiler, that
is, one consisting of a main cylindrical shell and two lower heaters (" bouilleurs")
united to the main shell by large tubes, the Invention is as follows:-
At the front end of the boiler, and below the two heaters, is placed a cylindrical
generator, which by means of two slanting tubes is connected with the heaters; it
lies across the whole width of the fireplace, and exposed to the direct action of the
fire from the grate, so that all the vertically ascending heat from the latter acts upon
it. In this generator will thus be created a strong heat action, and to promote a
quick and regular circulation of steam and water there is a circulating tube passing
through each tube which connects it with the heaters, and extending some distance
towards the end of the boiler, the lower ends of such circulating tubes extending
towards the lower part of the generator.
The grate is placed on a steep incline in front of and below the generator; it is
supplied continuously, and the fuel on the long dead plate is gradually heated and
coked as it descends, so as to be suitable for conversion into gas. These heating
gases are obliged to strike all round the generator, where they commingle with the
37

page_text: gases from the raw coals and with the air entering by an adjustable slide or door,
producing a complete combustion of the fuel and utilization of the gases. The gases
thus produced pass along over the bridge and over and under the heaters, and then
pass along to the chimney flue in the usual manner.
Air is admitted below the grate by a flap in front, and passes along a slanting 5
deflecting plate before entering the grate, where it meets the fuel at its greatest
heat, assisting the complete combustion.
For cleaning the grate the stoker inserts the rake through another flap above the
deflecting plate.
The grate bars are adjustable as to inclinations to suit various kinds of fuel, such 1
as sawdust and waste pieces of wood, tan, peat, coals large or small; this can be
done by a lever appliance even while at work.
There is a space between the lower end of the grate and the back wall of the
ashpit.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Gerard Wenzeslaus von Nawrocki in the Great Seal Patent Office
on the 3rd April 1880.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W.
v. Nawrocki, of 124, Leipzigerstrasse, Berlin, Germany, Patent Agent. "IMPROVE-
MENTS IN STEAM BOILERS." (A communication from Jacob Göhring, of Frankenthal,
in the Rheinpfalz, Germany.)
This Invention refers to a peculiar steam boiler construction with smoke preventing
fire place and adjustable slanting grate. As applied to a so-called French boiler, that
is, one consisting of a main cylindrical shell and two lower heaters (" bouilleurs")
united to the main shell by large tubes, the Invention is as follows, and as illus-
trated by the accompanying Drawings, Figure 1 being a vertical longitudinal
section, Figure 2 a plan section, Figure 3 a vertical cross section, and Figure 4 a
front elevation of the boiler.
At the front end of the boiler, and below the two heaters c, is placed a cylindrical
generator a, which by means of two slanting tubes b is connected with the heaters;
it lies across the whole width of the fire place, and exposed to the direct action of
the fire from the grate, so that all the vertically ascending heat from the latter acts
upon it. In this generator will thus be created a strong heat action, and to promote
a quick and regular circulation of steam and water there is a circulating tube d
passing through each tube b which connects it with the heaters, and extending some
distance towards the end of the boiler, the lower ends of such circulating tubes d
extending towards the lower part of the generator a.
As the main part of the generator is exposed to the action of the heated gases the
unequal expansion of the material of which it consists is almost entirely avoided.
The generator can never be without water as long as the heaters c contain only a
small quantity of same; hence it can never become red hot, and an explosion from
that reason is impossible. As the generator, because of the arrangement of the
grate, is obliged to take up the greatest part of the heat, and is of the simplest form,
it can never be without water, lying much lower than the main or rest part of the
boiler; this latter is not exposed to the direct action of the greatest heat.
The construction of the generator is very simple; it is also easily accessible by a
manhole at one end. It is also easily applied to any existing boilers, whether only
constructed or already at work.
The grate is placed on a steep incline in front of and below the generator; it is
supplied continuously, and the fuel on the long dead plate is gradually heated and
coked as it descends, so as to be suitable for conversion into gas. These heating
gases are obliged to strike all round the generator, where they commingle with the
gases from the raw coals and with the air entering by an adjustable slide or door e,
producing a complete combustion of the fuel and utilization of the gases. The door
e admits air to the space above the plate e¹. The gases thus produced pass along
over the bridge, over and under the heaters, and then pass along to the chimney
flue in the usual manner.
Air is admitted below the grate by a flap g in front, and passes along a slanting
deflecting plate H before entering the grate, where it meets the fuel at its greatest
heat, assisting the complete combustion.
For cleaning the grate the stoker inserts the rake through another flap L above
the deflecting plate H.
The grate bars are adjustable as to inclination to suit various kinds of fuel, such
as sawdust and waste pieces of wood, tan, peat, coals large or small; this can be
done by any known lever appliance, such as the one shown at f, even while at
Al

page_text: There is a space between the lower end of the grate and the back wall of the
ash pit.
The advantages of the Invention hereinbefore described are, besides an almost
smokeless combustion, the following :-
First. Rapid generation of steam.
Second. Complete utilization of the fuel by the combustion of the gases formed
therefrom.
Third. Considerable diminution of the danger of explosion.
Fourth. Very simple and strong, and hence proportionately cheap construction.
Fifth. Facility of adaptation for different kinds of fuel by the adjustable grate.
I claim as the Invention communicated to me,-
The generator a in combination with and applied to a boiler, and with a slanting
grate, the bars of which may be adjusted as to their angle according to the fuel
used, and provided with the usual means for preventing the formation of smoke,
and for promoting the perfect combustion of the fuel, substantially as described and
as illustrated in the accompanying Drawings.
In witness whereof, I, the said Gerard Wenzeslaus von Nawrocki, have here-
unto set my hand and seal, this Thirtieth day of March, in the year of our
Lord One thousand eight hundred and eighty.
החי חללם
700T
USA CIT יְזי
GERAR
WENZESLAUS VON NAWROCKI. (S.)