IMPROVEMENTS IN STEAM GENERATORS
Year: 1885

page_text: I, THORSTEN NORDENFELT of 53, Parliament Street in the City of Westminster
Civil Engineer do hereby declare the nature of my invention for "IMPROVEMENTS
IN STEAM GENERATORS" to be as follows:-
This Invention has for its object improvements in steam generators; and it
relates especially to generators in which air is forced into a fire box and from
which products of combustion thence issue into water thereby generating steam
which together with the gaseous products of combustion passes to the engine or
motor.
The invention consists in the employment of two separate boilers connected by
a steam pipe; one of these is a boiler with the usual fittings and containing the fire
box; the other is a vessel into which the products of combustion are led by a pipe
which dips down into the water contained in the vessel. The products of com-
bustion are thus thoroughly washed as they rise up through the water. This
second vessel is so constructed as not to be corroded by the products which become
condensed by the water; it may be of iron lined with lead or it may be of copper,
or other suitable substance.

page_text: *
I, THORSTEN NORDENFELT of 53 Parliament Street in the City of Westminster
Civil Engineer 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:-
This invention has for its object improvements in 'steam generators, and it
relates especially to generators in which air is forced into a fire box and from
which products of combustion thence issue into water thereby generating steam
which together with the gaseous products of combustion passes to the engine or
inotor.
The invention consists in the employment of two separate boilers, one of these is
a boiler with the usual fittings and containing the fire box; the other is a vessel
into which the products of combustion are led by a pipe which dips down into the
water contained in the vessel. The products of combustion are thus thoroughly
washed as they rise up through the water. This second vessel is so constructed as
not to be corroded by the products which become condensed by the water; it may
be of iron lined with lead or it may be of copper or other suitable substance.
The drawing annexed shews steam generator apparatus arranged as above
described.
Figure 1 is a vertical longitudinal section and Figure 2 a plan view.
A is a steam boiler of ordinary type-B is a pipe through which air can be forced
into the fire box of this boiler-C is a door by which the front of the fire box can
be closed in air tight. D are the fire bars and E return flue tubes-F is a door by
which the ordinary chimney or outlet flue can be closed in air tight-H is a flue by
which the products of combustion can be led to the bottom of a vessel K partly
filled with water and into which the products of combustion can pass through a
perforated sieve or grating I-M is a steam pipe passing from the vessel K and
O a steam pipe passing from the boiler A-P is a valve for closing the flue H-
this valve must be closed before opening the door C for the purpose of firing.
When the doors C and F are closed and air forced into the fire box through the
tube B the air must rise up between the fire bars and after passing through the
tubes E and flue H escape through the grating I into the water at the bottom of
the vessel K.
In thus passing through the water the products of combustion will be cleansed of
their solid matters and they will pass off through the pipe M together with the
steam arising from the water and can be utilised for working any ordinary high
pressure engine.
The steam escaping from the pipe O being unmixed with non-condensable gases
can be used in the cylinders of any surface or other condensing engine.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1.—The combination in a steam generator of two separate boilers, one a steam
boiler of ordinary type with inner furnace flues and in which steam is generated in
the ordinary manner-the other a vessel partly filled with water into which the
products of combustion from the furnace of the first boiler are allowed to escape
substantially as described.
2. The construction of steam generators substantially as herein before described
and illustrated in the drawing annexed.