IMPROVEMENTS IN STEAM BOILERS AND FURNACES AND IN FIRE-PLACES TIIEREFOR FOR PRODUCING SMOKELESS COM- BUSTION
Year: 1882

page_text: LETTERS PATENT to Peter Jensen of 33 Chancery Lane in the County of
Middlesex for an Invention of "IMPROVEMENTS IN STEAM BOILERS AND
FURNACES AND IN FIRE-PLACES TIIEREFOR FOR PRODUCING SMOKELESS COM-
BUSTION." A communication from abroad by Wilhelm Wilmsmann of Hagen,
Westphalia German Empire
PROVISIONAL SPECIFICATION left by the said Peter Jensen at the Office
of the Commissioners of Patents on the 27th January 1882.
PETER JENSEN of 33 Chancery Lane in the County of Middlesex "IMPROVE-
MENTS IN STEAM BOILERS AND FURNACES AND IN FIRE-PLACES THEREFOR FOR
PRODUCING SMOKELESS COMBUSTION." (A communication from abroad by Wilhelin
Wilmsmann of Hagen, Westphalia German Empire)
Among the smoke preventing or consuming fire-places for steam boilers and
furnaces the more-prominent are those in which the gases from the raw coals aro
made to pass through a layer of glowing coals and generally down through the
grate, which latter in consequence even when made of fireproof material is speedily
destroyed. The frequent renewals required thus make such constructions expensive
wherefore they are soon abandoned and none of them has become generally
applied.
As further by the aforesaid passage of the gases aud smoke through the already
glowing fuel a chemical decomposition and partial production of carbonic oxide
takes place it is important that additional air aud by preference heated air should
be supplied in order that the carbonic oxide may be burnt so as to produce carbonic
acid. This has heretofore generally been lost sight of.
The aforesaid disadvantages are remedied by this present Invention.
As applied to an underneath fired steam boiler and to a brick furnace say for
rebeating iron plates or for other heating or smelting purposes a hanging bridge or
arch made of fireproof material is arranged over the grate at or near the back end
of same so as to compel the gases from the raw coals thrown on the top of the fire
to pass under the said bridge, and the firing or stoking should be so that the fuel is
heaped up towards the back of the grate so high that the gases there pass through
Price G1

page_text: it. Immediately behind the hanging bridge air flues are arranged these supply
heated air from the side walls of the boiler setting or sides of the furnace; by this
supply of hot air to the gases immediately as they emerge from under the hanging
brick bridge a complete and smokeless combustion is effected of the still unconsumed
gases.
In order that the smoke and gases may not strike out into the stoke hole when
the fire door is opened lateral flues are provided by which the smoke and gases can
pass off to the side near the front or door end and emergo into the fuel close to and
below the hanging bridge.
The hanging bridge may be hollow for the passage of air and water through, in i
the former case it may act as a hot air supply flue or flues and by this means it is
kept from getting overheated and preserved against burning away too soon
The ash pit may be made with a close fitting door to check or stop steam or heat
production out of working hours.
As applied to a Cornish boiler a brick arch fire-place may be arranged in front of 1
it, and the grato may be partly or wholly a slanting or step grate. The hanging
bridge is just in front of the internal boiler flue and the laternal escape flues are
arranged similarly to those described. The hot air flues may terminate below the
hanging bridge.
By cutting away the lower part of the shell and of the internal flue of a Cornish
boiler at the front end the brickwork fire-place may be placed below the front end
instead of in front of it. The banging bridge may in that case be formed as a
bulged down part of the top of the internal fluo of the boiler.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Peter Jensen in the Great Seal Patent Office on the 27th July
1882.
PETER JENSEN of 33 Chancery Lane in the County of Middlesex "IMPROVE-
MENTS IN STEAM BOILERS AND FURNACES AND IN FIRE PLACES THEREFOR FOR
PRODUCING SMOKELESS COMBUSTION." (A communication from abroad by Wilhelm
Wilmsmann of Hagen Westphalia German Empire.)
Among the smoke preventing or consuming fire places for steam boilers and
furnaces the more prominent are those in which the gases from the raw coals are
made to pass through a layer of glowing coals and generally down through the
grate which latter in consequence even when made of fireproof material is speedily
destroyed The frequent renewals required thus make such constructions
expensive wherefore they are soon abandoned and none of them has become
generally applied.
As further by the aforesaid passage of the gases and smoke through the already
glowing fuel a chemical decomposition and partial production of carbonic oxide
takes place it is important that additional air and by preference heated air should
be supplied in order that the carbonic oxide may be burnt so as to produce
carbonic acid This has heretofore generally been lost sight of.
The aforesaid disadvantages are remedied by this present Invention
As applied to an underneath fired steam boiler and to a brick furnace say for
reheating iron plates or for other heating or smelting purposes a hanging bridge or
arch made of fire proof material is arranged over the grato at or near the back end
of same so as to compel the gases from the raw coals thrown on the top of the fire
to pass under the said bridge and the firing or stoking should be so that the fuel
is heaped up towards the back of the grate so high that the gases there pass
through it. Immediately behind the hanging bridge air flues are arranged these
supply heated air from the side walls of the boiler setting or sides of the furnace;
by this supply of hot air to the gases immodiately as they emerge from under the
hanging brick bridge a complete and smokeless combustion is effected of the still
unconsumed gases
In order that the smoke and gases may not strike out into the stoke hole when
the fire door is opened lateral flues are provided by which the smoke and gases can
pass off to the side near the front or door end and emerge into the fuel close to
and below the hanging bridge
The hanging bridge may be hollow for the passage of air and water through, in
the former case it may act as a hot air supply flue or flues and by this means it is
also kept from getting overheated and preserved against burning away too soon
The ash pit may be made with a close fitting door to check or stop steam or
heat production out of working hours.
Figure 1 is a longitudinal section of an underneath steam boiler Figure 1ª a
vertical section on line a band Figure 1b a vertical section on line c d. f is a
hanging arch or bridge made of fireproof material arranged over the grate at or
near the end of same so as to compel the gases from the raw coals thrown on the
top of fire to pass under the said bridge, and the firing or stoking should be so
that the fuel is heaped up towards the back of the grate so high that the gases
there pass through it. Immediately behind the hanging bridge the air flues ↑ ↑ ↑ª
are arranged, these supply heated air from the descending flues in the side walls
of the boiler setting; by this supply of hot air to the gases immediately as they
emerge from under the hanging brick bridge fa complete and smokeless combustion
is effected by the still unconsumed gases.
In order that the smoke and gases may not strike out into the stoke hole when