Year: 1887

page_text: Date of Application, 1st Dec., 1837
Specification Accepted, 6th Jan., 1888
I, OTTO LILIENTHAL of Möckerustrasse 135 Berlin in the Empire of Germany
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 consists in a tubular boiler or steam generator substantially as herein-
after described and illustrated in the accompanying drawings, in which water or liquid
introduced is first warmed by radiation from the furnace and afterwards brought
more directly under the heat of the flames thereof.
In the drawings, Fig. 1 is a vertical section through the boiler and furnace showing
the inclined position preferred for the former Fig. 2 is cross section through the
boiler, Fig. 3 is a section of one of the side walls-Fig. 4 is a rear elevation and
Fig. 5 a plan of the boiler.
The boiler or generator is preferably mounted in an inclined manner as shown, on
the ash box A, and the opposite side walls B B of the generator are formed of cast plates
having or containing the parallel tubes a bed efg and a²bcdefg' respectively-
The said side walls are connected by the rear wall C, provided also with tubes il n―
When fixed together the tube i connects the tubes bb, the tube connects the
tubes c c' and the n connects the tubes d d-The tube i is provided with the inlet k for
junction with the supply pipe, the tubes and n are in connection by the perforation
or tube m-Furthermore the tubes e and fare connected by the elbow or curved joint o
and the tubes e¹¹ of the other wall are connected together in a similar manner by
the elbow or curved joint o¹—The tubes g g' are closed at their terminations towards
the wall C.
At the edges of the wall B and B the tubes b and c, d and e, f and g, are connected
together respectively by the joints p q and s, and the tubes b and c, d and e¹
and gl are similarly connected respectively by equivalent joints pg and s (not shown
in drawings). The tubes a and a are likewise connected at this side by a pipe t,
having the outlet u for the steam or heated liquid the opposite ends of the pipes a
and a are closed at the wall C-The tubes and a are connected by a suitable number
of parallel pipes bent in the manner shown in Figs. 4 and 5, the tubes g' and a are
"

page_text: likewise connected by similar parallel pipes
the pipes aforesaid, as indicated in Fig. 4.
preferably interposed alternately with
The lowermost coil or bend of the tubes r and is contrived so as to leave free a
space the same being for the firing, the fuel is introduced through the door V in the
front plate, and the ashes etc. emptied through the door W in the rear wall-The lower
parts of the pipes may be utilized as grating for supporting the fire, or firebars
may be supported upon or over said pipes-The flues are contrived by the spaces
divided off by plates aa arranged within the windings of the pipes as shown
in Figs. 1 and 2, and by plates y. arranged outside said windings-The furnace
gases thus pass in the direction indicated by arrows 1, 2, 3, 4 and eventually into the
chimney in the wall z.
7"
Water or liquid entering into the steam generator at , or forced therein by a pump
circulates through the tubes bc d e ƒ and b¹ c¹ d'e¹ fand eventually arrives in the
tubes gg by this time it will have become heated almost to boiling by the heat
radiated from the fire, and passing up through the pipes will be evaporated therein,
issuing from them into the tubes a a¹ in form of steam-The sediment contained in
the water will be deposited in the tubes b c d e f and g and b¹¢¹ d'e¹ f¹and g¹ and
may be removed by cleaning the said tubes after removal of the back wall C and pipe
joints p. q. s.
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. A tubular boiler or steam generator having a series or series of bent pipes
arranged in parallel planes, and so bent as to define spaces suitable one for reception
of firing, others for flue or flues, said pipes being connected at one end alternately to
two feed pipes and at the other end alternately to other two pipes substantially as and
for the purpose set forth.
2. A tubular boiler or steam generator comprising in combination a series of bent
pipes arranged in parallel planes and defining spaces substantially as and for the
purpose set forth, together with walls enclosing said series, said walls having tubes
connected in series and communicating by the last two tubes of the series, with one
end of each pipe, alternately, of the aforesaid pipe series the other ends of said pipes
being connected alternately with tubes likewise contrived in said walls, said tubes being
in communication with an outlet for the purpose set forth.
Dated this 1st dovre of Dona 1907
OTTO LILIENTHAL.
By Herbert & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.