Year: 1887

page_text: Date of Application, 28th Dec., 1887
Complete Specification Left, 26th Sept.. 1888
Complete Specification Accepted, 2nd Nov., 1888
I, JAMES GEORGE GALLEY, of Forest Gate, in the County of Essex, Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to furnaces of all kinds but more especially to the furnaces of
boilers in which a forced draught is used.
It has for its object a novel method of construction by which the bars
upon which
the fuel is supported are kept free from clinker and stoppage, so that the air has free
and constant access to the fuel, and economy and perfect combustion of the latter are
effected whilst the bars are durable.
Supposing that my invention is to be applied to a boiler having an internal flue in
which the furnace is situated, I-arrange in such flue somewhat below the position
ordinarily occupied by the firegrate, two longitudinal shafts or axles, preferably
square in section and revolving in bearings at the front of the flue and at the back of
the fire. I make these shafts parallel and preferably square in cross section and
upon them I fit freely a number of discs or wheels of iron or other suitable material,
of such diameter that their edges or circumference overlap each for a sufficient
distance so that the edges of the discs upon each shaft revolve between those upon
the other shaft.
I make a sufficient number of openings through the discs, or I make arms connect-
ing their circumference with the centre, and I arrange a sufficient number of
projections upon the side of each disc at such a distance from the circumference as to
allow the edge of the discs upon the other shaft to revolve outside them, a space for
the passage of air being left between the discs.
I arrange these sets of discs so that their outer edges are close to the sides of the
flue, and I cause them to revolve slowly, continuously or at intervals by any convenient
power applied to the outer end of one or both shafts, and the shafts may also be
geared together by means of suitable wheels, outside the end of the fluc.
The fuel is supplied to the upper sides of the two revolving sets of wheels or discs,
and the space between their upper parts and the sides of the flue may if desired be
partly filled with firebricks or other suitable material.

page_text: As the discs revolve, the spaces between their edges are kept clean and the forma-
tion of clinker is prevented.
The lower part of the discs or wheels may if desired be made to revolve in a vessel
containing water by which they are cooled."
Air, cold or heated, is admitted or forced in through the front of the flue or through
the central shafts, which in such case are made hollow and are provided with a sufficient
number of holes through which the air passes out.
Instead of projecting pieces at the side of the discs or wheels, fixed scrapers or
distance plates may be used arranged between them in the lower part of the flue.
Apparatus constructed according to my invention is simple and durable, and it may
be modified more or less so as to be applicable to any kind of furnace.
EDWARDS & Co.,
35, Southampton, Buildings, London, W.C.,
Agents for the Applicant.

page_text: I, JAMES GEORGE GALLEY, of Forest Gate, in the County of Essex, 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, and accompanying drawing (that is to say) :-
My invention relates to furnaces of all kinds, but more especially to the furnaces
of boilers, and its use is greatly advantageous in such furnaces where a forced draught
is used.
It has for its object a novel method of construction by which the bar upon which
the fuel is supported are kept free from clinker and stoppage, so that the air has
free and constant access to the fuel, whilst great economy and perfect combustion of
the latter are effected, and the bars are durable and inexpensive.
The accompanying drawing is in illustration of my invention. Figure 1 is a
longitudinal section through a boiler having an internal flue in which the furnace is
situated. Figure 2 is a horizontal section and Figure 3, a transverse section through
the same. Figures 4 and 5 are detailed views of somewhat modified forms of
arrangement of the discs which serve as firebars.
a is the internal flue of the boiler, b representing the furnace door, c the deadplate,
and d shewing a suitable firebridge.
I arrange somewhat below the position ordinarily occupied by the firegrate (as
shewn in figures 1 and 3) two or more longitudinal shafts e, e, e, e, the number of
which will be varied according to the size of the furnace, four being shewn in the
drawing, preferably square in section and revolving in bearings f at the front of the
furnace and g at the back of the firegrate. I arrange these shafts so that they are
parallel and upon them I fit freely a number of discs or wheels i, i i, i, of iron or
other suitable material, which when the shafts e revolve are carried round with them.
These discs or wheels may be arranged upon the parallel shafts e, as shewn in
figure 4, their diameter being such that their edges or circumference overlap each
other for a sufficient distance as shewn, so that the edges of the discs upon each
shaft revolve between those upon the other adjoining shafts. I make cylindrical
projections upon one or both sides of each disc, these projections being of such
diameter that a small space is left between them and the edge of the discs upon the
adjoining shafts, and openings may be made through the discs as shewn in figure 5,
the cylindrical projections / being divided into separate projections between which
air can pass.
In figures 1, 2, and 3, the discs i upon the several shafts are shewn opposite to each
other, instead of their edges extending between the discs upon the adjoining shafts
as shewn in figure 4. They are made of such diameter that a small space is left
between the edges of the opposing discs, and a cylindrical projection h is shewn
formed upon the side of each disc i, so that the discs are all kept in their proper
relative positions.

page_text: As shewn in figure 3, the edges of the outer sets of discs are arranged so as to be
close to the sides of the flue a, and I cause all the discs to revolve slowly, either
continuously or at intervals, by means of any convenient power applied to the outer
end of one of the shafts, as indicated in figure 2 in which represents a suitable
toothed wheel or pulley upon the shaft, and all the shafts aro also geared together
by toothed wheels m, so that the whole of the discs are made to revolve
simultaneously.
Fuel is supplied to the upper side of the revolving sets of wheels or discs i which
serve as a firegrate, and as the latter revolve the air spaces between their sides and
edges are kept clean, the formation of clinker is prevented, and the perfect combustion
of the fuel is effected.
The lower part of the discs may, if desired, be made to revolve in a vessel containing
water by which they are kept cool.
Where forced draught is to be used the entire front of the flue is closed in the
usual way, pipes or channels being suitably arranged through which air is forced in.
Air, cold or heated, is admitted or forced in through the front of the flue, or
through the shafts, e, which in such case are made of sufficient size and hollow and
are provided with a number of holes through which the air passes out.
Instead of projections at the side of the discs or wheels i fixed scrapers. or distance
plates may be used, arranged between them in the lower part of the flue.
Apparatus constructed according to my invention is simple and durable and not
liable to get out of order.
I do not confine myself to the precise form, arrangement, and proportions, of the
several parts of the apparatus, which may be varied more or less so as to make it
applicable to any kind of furnace, but having now particularly described and
ascertained the nature of my said invention and in what manner the same is
to be performed, I declare that what I claim is :-
1. The firegrate consisting of the combination of two or more revolving shafts
carrying parallel discs or wheels, arranged and operating substantially as described
and shewn.
2. In combination with the revolving shafts e, discs i, and projections h, the toothed
wheels m, or equivalent devices by which they are made to revolve, substantially as
described and shewn.