Improvements in Circulating Devices for Boilers with Great Water Room.
Year: 1898

page_text: Date of Application, 8th Feb., 1898-Accepted, 6th Aug., 1898
COMPLETE SPECIFICATION.
Improvements in Circulating Devices for Boilers with Great
Water Room.
We, HEINRICH SILLER, Boiler Manufacturer, and PAUL HALFMANN, Engineer, of
the City of Barmen, in the German Empire, 10, Bockmuhlstrasse, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
:
Our invention has reference to an improved apparatus for steam boilers with
great water space, which is arranged for the purpose of insuring a rapid steam
generation and a sufficient and steady water circulation.
The accompanying drawing represents some modifications of boilers fitted with
our new device:
Figure 1 is a cross section of a Cornwall-boiler,
Figure 2 is a longitudinal section.
The device consists generally of a vessel or receptacle which is placed into the
water space near the fire grate. For this purpose around the fire box a of the
Cornwall boiler Figures 1 and 2, are laid round two rings b and fixed thereto in
a distance, which nearly corresponds with the length of the grate and
which are made of angle iron or such of any other convenient form, c being a
shell of thin sheet iron, which surrounding said rings are connected therewith by
screwing the corresponding ends together or fixing the shell to the rings by
U shaped irons as it is shown in the drawing. From this it will be understood
that round the fire grate is formed an annular space by the rings and the shell.
The latter is now provided at the lowest part with one or more apertures d' through
which water flows into the receptacle and at the top it is fitted with a mouth-
piece e, which is shaped like a blast pipe and which reaches with its orifice into
the steam space of the boiler.
In the drawing we have shown the mouth piece e having the same length as
the shell, but it may be also made tubular and arranged on one or more points at
the top of the shell.
The working of this apparatus is as follows:
The receptacle is filled with water, which surrounding the most heated part of
the fire box will be rapidly heated and converted into steam. The steam ascends
through the mouth piece into the steam space taking with it particles of water and
causing thus a continuous and steady ascending current of water mixed with
steam.
In this manner a sufficient circulation of the water will be gained and the genera-
tion of steam will be exceedingly supported, so that no incrustations on the fire
box within the shell can take place.
The examination and cleaning of a boiler fitted with the apparatus may be easily
done as the shell after removing the irons can be withdrawn from its supporting
rings. The shape of the steam generator and circulating device depends of the
system of the boiler. A Lancashire boiler that is a boiler with two fire boxes
has arranged around each fire box the described device.

page_text: Old boilers can be also provided with the generator.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare-that what
we claim is :-
In a-steam boiler with great water room the arrangement and use of a steam
generating and water circulating device consisting of a vessel or receptacle, the
form of which depending of the type of the boiler, which being placed into the
waterspace of the boiler near the fire grate is provided with apertures at the bottom
for being filled with water and a mouthpiece through which steam and water escapes
as described and for the purpose set forth.
Dahi Ond low of Webruary 1898
HEINRICH SILLER.
PAUL HALFMANN.
Per A. Daumas,
Agent for Applicants.