Improvements in Stoking Apparatus for Furnaces.
Year: 1895

page_text: Date of Application, 26th Apr., 1895--Accepted, 29th June, 1895
Improvements in Stoking Apparatus for Furnaces.
A communication by WILHELM RUHL, of 162 Yorkstrasse, Berlin, in the Empire
of Germany, Engineer.
1, WILLIAM PHILLIPS THOMPSON F.C.S. M.I.M.E. of The Agency for
Foreign Patent Solicitors 6, Lord Street, Liverpool and 6, Bank Street,
Manchester both in the County of Lancaster, 118 New Street Birmingham in
the County of Warwick, and 31 High Holborn in the County of Middlesex,
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 an improved stoking apparatus for furnaces,
which is characterized by the fuel, which has been suitably disintegrated according
to the required extent for the kind of fuel employed, being continuously supplied
to the furnace chamber by means of one or more conveying worms, which may
extend over several adjacent stoke holes, the fuel being directly mixed in front of
the place where combustion takes place with the necessary quantity of air driven
in under pressure, and conveyed by air pressure into the furnace chamber which is
suitably lined with refractory materials, where a complete and smokeless
combustion of the fuel takes place.
In the accompanying drawings
Figure 1 is a front view of the stoking apparatus partially in section ;
Figure 2 is a plan view partly in section; and
Figure 3 is a cross section.
Figures 4 and 5 are details of the same.
a is the combustion chamber which is closed by means of a plate 6 provided with
an opening c in front of which a door d is arranged. This door d has a large
opening through which the fuel mixed with air enters into the furnace
chamber a, and a number of smaller openings a capable of being closed and
regulated by means of slides, through which openings a current of air may be
admitted to the lowest part of the furnace chamber a in order to effect a thorough
combustion of any fuel settling down on the front of the floor of the chamber.
A mixing chamber is connected with the door d or with the opening of the
same, in front thereof, the size of which chamber h may be altered by means of a
movable cover e. For this purpose the cover e is suspended on a chain i or the like
running over pulleys, said chain being so connected with a regulating wheel i, so
that by revolving the latter the chain, or the like is wound up or let down and the
cover e is thus moved up or down.
One, or if necessary more, conveying worms kk' operated by hand or by
mechanical means, are arranged in a suitably large chamber or trough above the
mixing chamber h. The holders or troughs of this worm receive the fuel, conveyed
to them in a suitably disintegrated condition, and are provided over each stoke hole
with one, or if desired also more, openings g, Figure 3, which may be so regulated
by means of an adjustable slide m or the like operated by means of a hand wheel m',
or in other suitable manner, that the material conveyed over the opening 9 by the
worm may be supplied to the mixing chamber h in any desired quantity by means
of feed pipes.n and n'. In the form of construction shown on the drawing, the

page_text: same.
The fuel is thus maintained in a constant circulation in the troughs of the
conveyor worms.
If both the worms be employed for the feeding of the furnace, each worm trough
need only be provided at a suitable point with an opening g, with charging
pipes n n arranged underneath.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is : —
1. A stoking apparatus for furnaces in which the fuel, disintegrated if desired
even to the form of dust, is conveyed, by means of one or more conveyor worms.
arranged in troughs having one or more openings (9) which can be closed and
regulated in size, to a mixing chamber (h) adjustable as to size, and from this
latter is driven into the furnace chamber (a) by means of the current of air passing
in for the combustion under natural or forced draught, substantially as described
and illustrated.
2. In a stoking apparatus such as described in Claim 1, the arrangement of two
conveying worms (kk) conveying the fuel in opposite directions, and provided at
opposite ends with vanes or scoops q q', which receive the surplus fuel brought by
the one worm, and throw it into the track of the other adjacent worm in order that
may be again conveyed to the furnaces along with a supply of fresh fuel if
necessary, substantially as described and illustrated.
3. In a stoking device such as described in the preceding claims, the arrangement
of brushes (o) on the worms (k k¹) so as to lie over the fuel opening (g) and sweep
this latter for the purpose of freeing or brushing therefrom any fuel or dirt
adhering there, substantially as described and illustrated.
Dated this 25th day of April 1895.
WM. P. THOMPSON & Co.,
Agents.