Year: 1895

page_text: Date of Application, 14th Aug., 1895
Complete Specification Left, 14:h May, 1896-Accepted, 20th June, 1896.
I, EDWIN FAULKNER PADDON, of 36, Walbrook, in the City of London,
Engineer, do hereby declare the nature of this invention to be as follows:-
My present invention relates to firebars for the furnaces of steam boilers, or for
other purposes, and more especially to that form of transverse firebar in which an
angled plate or feather is attached to the lower edge of the firebar, and a series of
projections are made upon the front and back of the bar, those in front being
arranged opposite to spaces left between those at the back, and those upon each bar
being arranged so as to enter the spaces between those upon the adjoining..bars,
whilst the bars themselves turn upon pivots at their ends and are connected so that
the whole of the bars can be made to turn or rock more or less simultaneously upon
their pivots in either direction.
In such firebars it is, found that the upper part of the transverse bars and the
projections upon the front and back. of the bars, burn and wear-away much more
quickly than the transverse bars themselves with their pivots and the parts
connected with them; and my present invention has for its object a novel method
of construction by which the parts so becoming burned, and wearing, can be very
simply, easily, and cheaply, replaced and renewed. when necessary, whilst the
remaining parts continue in use for a much longer time than the renewable parts.
For this purpose, I make the: body.of the transverse bar of sufficient depth and
nearly rectangular in cross-section but somewhat wider at its upper edge than
at the lower edge upon which the plate extending downward and forward is
formed.
.
I make the bar of uniform section from end to end, and I form upon its ends the
pivots which carry it, and which turn in notches in bars or fraines at the sides of
the furnace.
The upper edge of the bar, upon which the fire rests is formed of a series of
separate pieces, adjoining each other and of sufficient width and depth, their lower
edges resting upon the upper edge of the transverse bar,-which is preferably
somewhat convex in transverse section the lower edge of the pieces being similarly
concave to fit it.
Upon each of the pieces described I form a projection. both in front and at the
back, these projections being of considerably less width than that of the separate
pieces, so that when the latter are adjusted against each other on the bar a
considerable space is left between the projections, into which spaces the projection
upon the adjoining bars fit freely. :
The projections may be of any desired length, the distance between the
transverse bars being arranged to correspond, and where they fit upon the bars they
are preferably of sufficient depth to reach nearly to the bottom of the latter, a
notch being made at the centre of their lower-edge to enable them to pass down
and fit over the bar. This notch is made wider at its upper end so that it may fit
the bar sufficiently well, and in order to enable it to be fitted upon the latter, I
prefer to make the parts of the bar for a sufficient length inside the end pivots
parallel from top to bottom (in cross section) so that the separate pieces with their
projections may be there fitted upon the bar and then moved endways along it to
their proper positions.

page_text: In the same way they can be readily removed and others substituted when
necessary.
The outer ends of the projections are of less depth than their centre parts, and
may be brought up to a point or nearly a point.
The whole of the angle-plates below the bars are connected together by a bar
pivotted to them, and worked when required by a lever so that the whole of the
bars are simultaneously rocked backward and forward, the projections upon
the separate pieces moving up and down in the spaces between those upon the
adjoining bars.
The outer projections upon the end firebars of the furnace work preferably
between similar fixed ones upon the dead plate and bearer at the ends, or they may
be omitted from the outer sides of such end firebars which will then be adjusted
close to the fixed ends of the furnace.
By my invention, firebars of the most effectual kind for use in furnaces of all
kinds are provided, whilst the parts most liable to become burned and worn out
can be readily and easily replaced without interfering with the remaining more
durable parts.
The whole is very simple, cheap, and effective, and not liable to get out of order.
I do not confine myself to the precise form and details of the improved apparatus,
which may be varied more or less as may be found advisable in varying
circumstances.
Dated this 14th day of August 1805
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.
I, EDWIN FAULKNER PADDON, of 36, Walbrook, in the City of London,
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 present invention relates to firebars for the furnaces of steam boilers, or for
other purposes, and more especially to that form of transverse firebar in which an
angled plate or feather is attached to the lower edge of the firebar, and a series of
projections are made upon the front and back of the bar, those in front being
arranged opposite to spaces left between those at the back, and those upon each
bar being arranged so as to enter the spaces between those on the adjoining bars,
whilst the bars themselves turn upon pivots at their ends and are connected so that
the whole of the bars can be made to turn or rock more or less, simultaneously,
upon their pivots in either direction, in order to keep them clean and free them
from clinker.
In such firebars it is found that the upper part of the transverse bars and the
projections upon the front and back of the bars, upon which the burning fuel rests,
burn and wear away much more quickly than the transverse bars themselves, with
their pivots and the other parts connected with them; and my present invention
has for its object a novel method of construction by which the parts so becoming
burned, and worn away, can be very simply, easily, quickly, and cheaply, replaced
aud renewed when necessary, whilst the remaining parts continue in use for a much
longer time than the renewable parts.
The
accompanying drawing is in illustration of my present invention, Figure 1
being a general view of one of the improved bars. Figure 2 is a plan, shewing
part of several adjoining bars. Figure 3 is a transverse section through such bars.

page_text: Figure 4 is a perspective view shewing the separate, renewable part of the bar';
and Figure 5 is a transverse section shewing a slight modification in the shape of
the bar.
I make the body a of the transverse bar of sufficient depth, and rectangular in
cross-section (as shewn in Figures 1, 2, and 3), the plate b, extending downward
and forward, being formed upou its lower edge.
I make the bar a of uniform section from end to end, and
the pivots c, c, which carry it, and which rest in notches in
sides of the furnace, (not shown in the drawing) so that the
upon their pivots.
I form upon its ends
bars or frames at the
bars can turn or rock
The upper edge of the bar a, upon which the fire rests, is formed of a series of
separate pieces d, (shewn separately in Figure 4), adjoining each other and of
sufficient width and depth, their lower edges resting upon the upper edge of the
transverse bar which may be flat as shewn, or somewhat convex in transverse
section, the lower edge of the pieces being similarly concave to fit it.
Upon each of the pieces d described, I form a projection e both in front and
at the back, these projections being of considerably less width than the length of
the separate pieces d, so that when the latter are adjusted against each other on the
bar a considerable space is left between the projections e, into which spaces the
projections upon the adjoining bars fits freely, as shewn in Figures 2 and 3.
The projections e may be of any desired length, the distance between the
transverse bars a being arranged to correspond, and in plan they may taper towards
their outer ends instead of being rectangular as shewn. Where they fit upon the
bars they are preferably of sufficient depth to reach nearly to the bottom of the
latter, a notch at f, Figure 4, being made at the centre of their lower edge to
enable them to pass down and fit over the bar a. The separate pieces with their
projections may be therefore fitted upon the bar, and adjusted against each other
upon it, and one or more of them can be readily removed and others substituted
when necessary.
Guides, slightly projecting from the bars d, guide and hold the
lower ends of the projections e.
The outer ends of these projections are preferably of less depth than their centre
parts, and may be brought up to a point, or more or less nearly to a point, as
shewn in Figure 4.
The whole of the angle-plates b below the bars are connected together in the
well-known way by a bar pivotted to them at g, and worked when required by a
lever so that the whole of the bars are simultaneously rocked backward and forward,
the projections e upon the separate pieces moving up and down during such rocking,
in the spaces between those upon the adjoining bars.
The outer projections upon the end firebars of the furnace work preferably
between similar fixed ones upon the dead plate and bearer at the ends, or they may
be omitted from the outer sides of such end firebars which will then be adjusted
close to the fixed ends of the furnace.
In order that the separate moveable pieces may be prevented from any liability
to rise from the bar a upon which they are fitted, the latter may be in cross section
somewhat wider at its upper than at its lower edge, as shewn in Figure 5, the
notch fin the separate pieces (Figure 4) being made of corresponding shape so
that it fits freely upon the bar a but cannot be lifted off the latter. In order that
the notel ed pieces may be fitted upon the bar so formed, I make the parts of the
bar a adjoining the pivots c, for a sufficient part of their length, parallel from top
to bottom, (as shewn in dotted lines in Figure 5). The notched pieces are dropped
upon the bar at these points and are then moved endways upon it into their
positions, (the projecting guides h being omitted).
It will be seen that my invention consists substantially in making the parts of
the firebars which are subjected to the greatest heat, separate from the body of
the bar, and so that they can be readily removed, replaced, or fresh oues substituted
when necessary.
In this way firebars of the most effectual kind for use in furnaces of all kinds

page_text: are provided, whilst the parts most liable to become burned and worn out can be
readily and easily replaced without interfering with the remaining more durable
parts. It is not absolutely necessary, that the bars should rock, as the method of
construction may be applied to fixed as well as to rocking bars.
The whole is very simple, cheap, and effective, and not liable to get out of
.order.
I do not confine myself to the precise forin and details of the improved apparatus,
which may be varied more or less as may be found advisable in varying
circumstances.
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
claim is:-
1. In firebars for furnaces, the combination with the body of the firebar of
separate loose and interchangeable pieces at the parts which are exposed to the
greatest heat, substantially as described and illustrated.
2. The combination of the transverse bar a having pivots c, c, at its ends, with
separate removeable pieces d fitting upon the bar a and having projections e at their
sides, which projections enter the spaces between the similar projections upon
adjoining bars, substantially as described and illustrated.
3. The method of holding the separate pieces d upon the bar a, by making the
cross section of the latter and the corresponding notches in the former, taper, one
or both ends of the bar a adjoining the pivots c, being made rectangular, to enable
the separate pieces d to be fitted upon it, substantially as described and illustrated
in Figure 5.
Dated this 14th day of May 1806
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.