IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACES
Year: 1860

page_text: LETTERS PATENT to Eugen Langen, of Cologne, in the Kingdom of
Prussia, for the Invention of "IMPROVEMENTS IN STEAM BOILER AND OTHER
FURNACES."
Sealed the 24th July 1860, and dated the 28th January 1860.
PROVISIONAL SPECIFICATION left by the said Eugen Langen at the
Office of the Commissioners of Patents, with his Petition, on the 28th
January 1860.
I, EUGEN LANGEN, of Cologne, in the Kingdom of Prussia, do hereby
declare the nature of the Invention for "IMPROVEMENTS IN STEAM BOILER AND
OTHER FURNACES," to be as follows:-
This Invention has for its object improvements in steam boiler and other
furnaces. For these purposes a series or succession of sets of fire-bars is
employed one below the other, the lower sets or series projecting more and
more into the fire-place or furnace, so that the surface of the burning fuel
inclines from the upper to the lower parts of the interior of the furnace. It is
preferred that the fire-bars at their inner ends should be bent or formed with
elbows, so that their inner ends may incline from the horizontal line down-
wards, and so that their lower ends may come within a short distance of the
horizontal parts of the next set or series of fire bars below, leaving however a
space to admit of coal being pushed forward between the inclined parts of the
upper set or series of bars and the horizontal parts of the set or series of

page_text: bars next below them. In front of each set or series of bars is fixed a
horizontal dead plate on a level with the horizontal parts of the fire-bars.
At the end of the furnace nearest the bridge there is a set of ordinary fire-
bars, which are preferred to be horizontal, but this may be varied. This set
of fire-bars is at a lower level than the ends of the lowest of the sets or series
of fire-bars before described, and between them there is a vertical set of fire-
bars mounted on axes so that they may, when desired, be opened outwards
into the ash-pit.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Eugen Langen in the Great Seal Patent Office on the
27th July 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EUGEN
LANGEN, of Cologne, in the Kingdom of Prussia, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of January, in the year of our
Lord One thousand eight hundred and sixty, in the twenty-third year of Her
reign, did, for Herself, Her beirs and successors, give and grant unto me, the
said Eugen Langen, Her special licence that I, the said Eugen Langen, my
executors, administrators, and assigns, or such others as I, the said Eugen
Langen, 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 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 STEAM BOILER AND
OTHER FURNACES," upon the condition (amongst others) that I, the said Eugen
Langen, my executors or administrators, by an instrument 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 immediately after the date of the
said Letters Patent.
NOW KNOW YE, that I, the said Eugen Langen, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
This Invention has for its object improvements in steam boiler and other

page_text: furnaces. For these purposes a series or succession of sets of fire-bars is
employed one below the other, the lower sets or series projecting more and
more into the fire-place or furnace, so that the surface of the burning fuel
inclines from the upper to the lower parts of the interior of the furnace. It
is preferred that the fire-bars at their inner ends should be bent or formed
with elbows so that their inner ends may incline from the horizontal line
downwards, and so that their lower ends may come within a short distance of
the horizontal parts of the next set or series of fire-bars below, leaving,
however, a space to admit of coal being pushed forward between the inclined
parts of the upper set or series of bars and the horizontal parts of the set or
series of bars next below them. In front of each set or series of bars is fixed
a horizontal dead plate on a level with the horizontal parts of the fire-bars.
At the end of the furnace nearest the bridge there is a set of ordinary fire-
bars, which are preferred to be horizontal, but this may be varied. This set
of fire-bars is at a lower level than the ends of the lowest of the sets or
series of fire-bars before described, and between them there is a vertical set of
fire-bars mounted on axes so that they may, when desired, be opened outwards
into the ash-pit.
And in order that my Invention may be most fully understood and
furnaces. For these purposes a series or succession of sets of fire-bars is
employed one below the other, the lower sets or series projecting more and
more into the fire-place or furnace, so that the surface of the burning fuel
inclines from the upper to the lower parts of the interior of the furnace. It
is preferred that the fire-bars at their inner ends should be bent or formed
with elbows so that their inner ends may incline from the horizontal line
downwards, and so that their lower ends may come within a short distance of
the horizontal parts of the next set or series of fire-bars below, leaving,
however, a space to admit of coal being pushed forward between the inclined
parts of the upper set or series of bars and the horizontal parts of the set or
series of bars next below them. In front of each set or series of bars is fixed
a horizontal dead plate on a level with the horizontal parts of the fire-bars.
At the end of the furnace nearest the bridge there is a set of ordinary fire-
bars, which are preferred to be horizontal, but this may be varied. This set
of fire-bars is at a lower level than the ends of the lowest of the sets or
series of fire-bars before described, and between them there is a vertical set of
fire-bars mounted on axes so that they may, when desired, be opened outwards
into the ash-pit.
And in order that my Invention may be most fully understood and
readily carried into effect, I will proceed to describe the Drawings hereunto
annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shews a longitudinal vertical section of a steam boiler. furnace
constructed according to my Invention; Figure 2 is a horizontal section; and
Figure 3, an end viow of the same. a, b, c, are three sets of fire-bars one
below the other, the lower sets projecting more and more into the fire-place or
furnace. The inner ends of these fire-bars are formed with elbows, as shown,
so that their inner ends incline downwards towards the horizontal parts of the
series of bars below them, and a space is left between the lower ends of the
inclined portions of the sets of bars and the sets of bars below. In front of
cach set of bars is a horizontal dead plate d, d, on a level with the horizontal
parts of the fire-bars; on these plates the coals rest before they are pushed
forward through the openings between the sets of bars. e is a set of horizontal
bars at the end of the furnace nearest the bridge; this set of bars is, as is
shown, at a lower level than the ends of the lowest of the sets of bars a, b, c,
and between them there is a vertical set of fire-bars f mounted on axes f¹,
so that the vertical bars may, when desired, be opened outwards into the ash-
pit, in order that the coals on the fire-bars may be raked out into the ash-pit.

page_text: These fire-bars are moved into or out of their vertical position by means of
rods g, g, attached to arms f projecting from the set of bars f. Figure 4
shews a side view and plan of the tool I employ for pushing forward the coal
resting on the plates d, d, through the openings between the sets of bars; and
Figure 5 shews a hook for clearing the spaces between the fire-bars.
In witness whereof, I, the said Eugen Langen, have hereunto set my
hand and seal, this Thirteenth day of July, in the year of our Lord
One thousand eight hundred and sixty.
EUGEN LANGEN. (L.S.)