Improvements in Fixed Tubular Steam Boilers.
Year: 1890

page_text: `Date of Application, 26th Apr., 1890—Accepted, 31st May, 1890
drg A
COMPLETE SPECIFICATION.
Improvements in Fixed Tubular Steam Boilers.
I, ERNEST GOTTHELF VONHOF, Manufacturer of Sachsenburg near Heldrungen in
the Empire of Germany 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 -
The present invention refers to a multitubular steam boiler in which a regular
carry-off of the smoke and other products of combustion is attained by fixing a fire-
chamber in the upper water-space, and connecting same on the one hand with the
fire-box by central pipes and on the other hand by peripheral pipes with an opening.
or chamber for carrying off the smoke centrally situated at the bottom of the
boiler.
A steam boiler made in accordance with the invention is illustrated in fig. 1 of the
accompanying drawing in vertical section, and in fig. 2 in horizontal section.
As will be seen from the drawing, the steam boiler A is fitted with an inner
furnace b, the gaseous products of combustion from which are led through central
vertical fire pipes, c, into a fire chamber, a, placed in the upper water space of the
boiler. From the fire chamber, c, pipes, d, arranged peripherially around the pipes, c,
are led down through the bottom of the boiler and carry off the products of
combustion into a chamber provided under the ash-chamber f. From the
chamber the products of combustion escape through a central opening e into the
chimney, g.
By the arrangement above described it is rendered possible not only to obtain
the greatest conceivable fire contact in small space but also, in consequence of the
central carry-off of the heating gases, to make full use of each fire-pipe; so that with
the thinnest possible wall material the most profitable effect can be obtained from
the fuel.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In fixed tubular steam boilers, the combination of the fire-box with a fire
chamber and means for connecting the latter with a smoke carry-off arranged
centrally in the boiler substantially as herein before set forth.
2. In fixed tubular steam boilers, the combination of the fire-box with a fire
chamber placed in the upper water space, and means to connect said fire chamber
with a smoke carry-off arranged centrally in the boiler, substantially as hereinbefore
set forth.
3. In fixed tubular steam boilers, the combination of a central fire-box with a fire
chamber placed in the upper water space, and means to connect said fire chamber
with a smoke carry-off arranged centrally in the boiler, substantially as herein before
set forth.
4. In fixed tubular steam boilers, the combination of a central fire box with a fire
chamber placed in the upper water space, central connecting pipes between said
fire chamber and the fire-box, and means to connect the fire chamber with a smoke
carry-off arranged centrally in the boiler substantially as herein before set forth.
5. In fixed tubular steam boilers, the arrangement of a fire chamber, in the upper
water space, which is connected with the fire-box by central pipes and by the pipes
encircling these central pipes as a border with the centrally arranged smoke carry-off,
substantially as herein before set forth.

page_text: 6. In fixed tubular steam boilers, the combination of the fire-box with the fire
chamber a central pipes c the pipes d encircling the central pipes as a border,
chamber and central smoke carry-off e substantially as hereinbefore set forth.
Dated this 22nd day of Anril 1890.
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.