A New or Improved Furnace for Burning Town and other Refuse.
Year: 1892

page_text: Date of Application, 7th Sept., 1892
Complete Specification Left, 7th June, 1893-Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
A New or Improved Furnace for Burning Town and other Refuse.
We, GEORGE HARRY BIDDLES, Engineer, of 7 Holland Road, Leicester, and
JOHN HEWES, Builder, of 4 East Street, London Road, Leicester, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to a new or improved furnace for burning and destroying
town and other refuse such as is generally stored in ash pits, dust bins and
the like.
Our improved furnace consists of two side walls connected by an arched top
furnished with a central opening which is closed by a suitable lid and use for
loading the refuse into the furnace. This opening leads into a combustion chamber
containing a hearth terminating at the rear with a fire bridge extending some
distance into the combustion. chamber which is thus divided into two parts. In
front of the hearth are placed fire bars on which the combustible is placed, the
burnt parts or clinkers issuing therefrom falling through the ash pit below upon a
rocking plate which conveys them into barrows outside the furnace. Beneath the
hearth is arranged the main flue leading into any suitable stack, this flue being
provided as well as the rear part of the combustion chamber which extends between
the flue and the hearth with doors for convenience of cleaning. The arch of the
main flue is sprung on the pillared rear wall, and on the front vertical wall, carrying
the hearth; and, furnished below this arch with a door also used for cleaning
purposes. An inclined flue extends from the ash pit to horizontal flues formed on
each side through a portion of the top of the furnace, and leading to a hood inside,
and in front of the same, whence the gases and dust or soot are conveyed into the
combustion chamber. The front of the furnace is closed by three arched doors, the
centre of which has the form of a hinged flap, and is operated by means of a
weighted lever fixed to a wall plate, while the side doors swing on hinges, and are
self closing. Openings are formed in front through the top of the main flue for the
entrance therein of the products of combustion, proceeding from the front part of
the combustion chamber.
;
.
Dated
2000
JAMES STEVENSON,
Gray's Inn Chambers, 20, High Holborn, W.C., Agent for Applicants.
COMPLETE SPECIFICATION.
A New or Improved Furnace for Burning Town and other Refuse.
We, GEORGE HARRY BIDDLES, of 7 Holland Road, Leicester, Engineer, and
JOHN HEWES, of 4 East Street, London Road, Leicester, Builder, 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.:—
Our invention relates to a new or improved furnace for burning and destroying
town and other refuse such as is generally stored in ash pits dust bins and the like.
The top of the said' furnace is furnished with a central opening, closed by a sliding
lid, for loading the refuse into the combustion chamber: This chamber contains a
hearth terminating at the rear with a fire bridge dividing the said chamber into two
parts. In front of the hearth are the fire bars the clinkers from which fall into an
ash pit below upon a rocking plate which conveys them into barrows outside the
furnace. Beneath the hearth. is the main flue leading to any suitable stack which

page_text: .
flue and the rear part of the combustion chamber are provided with doors for
convenience of cleaning. Inclined flues extend from the ash-pit to horizontal flues
running through the upper part of the furnace and leading to a hood in front by
means of which the gases and dust or soot are conveyed to the combustion
chamber.
.
The front of the furnace is closed by three hinged doors the centre one of which
is operated by a weighted lever and overlaps the side ones so as to automatically
close them. Openings in the top of the main flue allow of the passage of the
products of combustion from the front of the combustion chamber.
Referring to the accompanying sheet of drawings
Figure 1 represents a central longitudinal section of my improved furnace and
Figure 2 is a plan thereof.
Figure 3 is a cross section on the line X, X of Figure 1, and Figure 4 is a front
elevation of the lower portion of the said furnace.
Like letters of reference represent similar parts throughout the views.
a, a are the two side walls of the furnace joined together by an arched top a¹.
is a feed opening in the top a closed by a lid or cover c sliding in guides c¹ and
connected by a rod to a pivoted lever whereby the said lid is opened or
closed. dis the combustion chamber and e the hearth terminating at the rear
in a fire-bridge f extending up some distance in the combustion chamber so as
to practically divide the latter into two parts. g. are the fire-bars in front of
the hearth on which the combustible is placed, and the clinkers from which fall
into the ashpit below upon a rocking plate for conveying them into barrows
for removal. The said bars oscillate on a central shaft and are operated by
cams, bell-cranks connected by bars 12, and pivoted arms actuated by any
suitable motor, or other equivalent mechanism may be employed. The front
cams or cranks are also connected to the rocking plate so as to elevate
and depress the front end thereof for tipping the clinkers into barrows beneath.
kis the main fluc built beneath the hearth and leading to a stack or chimney.
This flue is provided with doors k', k for cleaning purposes it also has a door ³
at the end. The rear part of the combustion chamber has also a door k for a
similar purpose. 1, 1 are horizontal flues formed in the upper part of the furnace
so as to meet at a point in the front thereof as shown in Figure 2 their open
ends being covered by a hinged flap or valve operated by a rod 12. An inclined
flue extends downwards from each of the flues to an opening on each side
of the ash-pit below the fire-bars. In front of the flues is a hood m extending
across the front of the furnace and serving in combination with the said flues, to
conduct the dust and gases, caused by the operation of clinkering from the ash-
pit into the combustion chamber when the flap or valve is opened. n, n' and n²
are three doors in front of the furnace, the centre one n¹ of which is hung from a
shaft o carried in bearings o' so as to be opened and closed by means of a handle
and arm p' connected by a rod to an arm of fixed to the shaft o, the system of
levers and balance weight o³ keeping the said door in its open or closed position.
The two side doors n, n² are hinged to the two wall plates 9, 9 and are kept in
their closed position by means of the centre door whose edges overlap the outer
edges of the side doors so that when the centre door is closed it also closes the
side doors.
P
The refuse is fed into the furnace by means of a rotating hopper r mounted
on a shafts and provided with separate chambers closed by hinged flaps or
doors the said doors being secured by pivoted catches taking underneath
projections when in their locked positions. The hopper is rotated by means of
a hand wheel t and worm t' gearing into a worm-wheel u fixed to the shaft s.
The combustible gases pass from the chamber d underneath the hearth e and
through openings into the main flue k, thus drying the refuse on the hearth
and destroying the gases generated.
The advantages obtained by the use of this improved furnace are a reversionary
action of the fire and gases as shown by the arrows in Figure 1 whereby the hearth

page_text: is heated for drying the refuse, the combustion chamber being placed between the
refuse cell and the main flue; also the improved arrangement of doors for cleaning
out the flues and the means of conducting the dust and gases caused in the
operation of clinkering into the combustion chamber; also the improved arrange-
ment of furnace doors whereby the heat is more confined in the cell during
the operation of clinkering; also in conveying the ashes from the grate bars.
directly into a barrow by means of a rocking plate, and the main fluc being built
under the hearth and combustion chamber greatly reduces the space and brickwork
required in building the furnace.
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.
First The improved construction of refuse-burning furnaces consisting of the
combustion chamber d, the hearth e fire-bridge f main flue k and doors k¹, k², k³-
and arranged and combined substantially as described and shown in the accom-.
panying drawings and for the purposes specified.
Second-The improved arrangement of flues for conducting the dust and gases.
from the ash-pit to the combustion chamber substantially as described and shown.
Third The improved arrangement of furnace doors n, n', and n² substantially
as described and for the purpose specified.
-
Fourth-The improved arrangement of rocking plate for conveying the
ashes falling from the fire-bars into a barrow substantially as described and shewn..
Fifth The improved refuse-burning furnace, substantially as described and.
shown and for the purposes specified.
2 T
1000
JAMES
STEVENSON,
Gray's Inn Chambers, 20, High Holborn, London, W.C.,.
Agent for Applicants.