Improvements in Boiler Furnaces and Feeders therefor.
Year: 1898

page_text: Date of Application, 31st Aug., 1898-Accepted, 23rd Dec., 1898
COMPLETE SPECIFICATION.
Improvements in Boiler Furnaces and Feeders therefor.
I; JULIUS WEZEL, of Dresdenerstrasse, 17, Leipzig, in the Empire of Germany,
Manufacturer, 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 purpose of the present invention is to prevent the introduction of outside
air to the fire when feeding the furnace and to utilise the warmth of the heating
gases as much as possible for the boiler.
By this arrangement the fuel is from time to time put in by a slide closing
the section of the feeding space whilst in its return the closing valve of the
feeding space closes automatically. The enclosure for the fire and heating
gases can be composed of parts of the boiler.
In the annexed drawings:-
Fig. 1 is a front elevation of the feeder.
Fig. 2 is a side view with slide pushed in.
Fig. 3 the same with slide pulled out.
Fig. 4 is a plan view.
Fig. 5 a longitudinal section through the feeder.
Fig. 6a longitudinal section of a boiler with feeder and enclosure of the
fires and heating gases composed of boiler parts.
Fig. 7 a front view of the same.
Fig. 8 a modification applied to another form of boiler.
In the feeding hopper C the slide A is so arranged as to close the hopper
entirely by moving tightly therein.
In order to guide the slide the latter is provided with lugs
grooves in the hopper walls.
sliding in
These grooves run to the outside of the hopper, see, Fig. 5, in such a way as
to guide the slide A from standing to lying position. Motion is given to the
slide by means of toggle jointed rods, the rods g of which are articulated to
the slide and the rod pivoted on brackets d on the hopper. The rods h are
provided with handles in order to swing slide upwards and then move it
along the hopper. But in order that the closing valve S, in order to prevent
the hurtful introduction of air, may close the hopper C before the slide A in
going back opens it, the valve S is closed automatically by means of gear con-
nected with the moving gear of the slide A.
The balance weight J of the valve S is so chosen that the slide closes itself.
Moreover, the balance weight is provided with a handle at the end of a guide
rod having a slot m by means of which the valve S is held up by hooking
the slot m on a lug n fastened on the wall.
A suitable guided sliding bar 2, the end of which is elastic and formed as
catch nose o, is connected by the draw rod r to lever hats and in feeding the
furnace with fuel the action is as follows:-
The valve S is down and the slide A pulled back, see Figs. 3 and 5, whereby
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page_text: the bar is not engaged by nose o or lug n, the hopper C is filled between the
slides A and S, the valve S is drawn up by hand, and the bar is hooked on
the lug n.
To feed the furnace with fuel the slide A is lifted and pushed in, pushing
in also the rod p which pushes the nose behind the bar 1, see Fig. 2, so that
it catches the bar again when slide A is pulled back past the valve S where-
upon on further pulling out the slide A, nose o advances, drawing the bar / with
it and setting it free from the lug n so that the valve S goes down, see Fig. 3,
and the introduction of outside air is in all cases avoided.
This apparatus can be used under different conditions and in different forms
also it is more suitable for use with means for utilizing the fuel to the fullest
possible extent in heating the walls of the combustion chamber and boiler parts
as shown in Figs. 6 to 8.
Therefore all the enclosure walls are made of box like parts T. Between
them the furnace crown R, the bridges and O' and the back wall M are made
so that they all have their inner spaces in connection with the side spaces on
the side walls of the parts T.
In water tube boilers the back wall M is used at the same time as a water
space and the front space N is also put between the side pieces T and communi-
cates laterally with them, like the other parts and connected as it may be also
with the furnace crown R as shown in Fig. 1.
In cylindrical boilers the respective outside pieces T and M leaving space for
the proper draught, can be brought into communication with the water and
steam space in any manner required.
This method also can be employed to enclose only the furnace as shown in
Fig. 8 in order not to enclose the whole boiler flues by parts connected with
the interior of the boiler.
The methods of junction vary according to the system of boiler, the chief
feature being that the space ordinarily occupied by masonry and the heat taken
up by them are used for the boiler and such boiler envelopments may receive
independent inlets and outlets.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what
I claim is:-
1. For the profitable heating of boilers an air tight fuel feeder comprising a
slide A closing the feed hopper and guided by grooves f and lugs and moved
by means of lever gear ghh, the said slide lying flat before the hopper for
receiving fuel and swings up on entering the hopper in order to carry the fuel
into the furnace, and a valve S adapted to automatically drop down when set
free by means of the nose o, moved by the lever releasing the bar 7 from a
detent lug n, for the purpose set forth.
2. For the purpose and means claimed under 1 the formation of the furnace
and flues of boilers with hollow side walls, T, furnace crown R, the bridges 0, 0¹,
walls NM and the like with cross pieces connecting them together so that all
their interior spaces communicate and also with the boiler or not, as desired.
Dated this 31st day of August 1898.
HERBERT HADDAN & Co.,
Agents to Applicant, 18, Buckingham Street, Strand, W.C., London.