IMPROVEMENTS IN FURNACES."
Year: 1855

page_text: LETTERS PATENT to John Juckes, of 18, Baker Street, Lloyd Square,
Islington, for the Invention of "IMPROVEMENTS IN FURNACES.""
Sealed the 22nd February 1856, and dated the 30th August 1855.
PROVISIONAL SPECIFICATION left by the said John Juckes at the Office
of the Commissioners of Patents, with his Petition, on the 30th August
1855.
I, JOHN JUCKES, of 18, Baker Street, Lloyd Square, Islington, do hereby
declare the nature of the Invention for "IMPROVEMENTS IN FURNACES" to be
as follows:-
This Invention consists of improvements in arranging the fire bars of
furnaces where continuous or endless chains of fire bars are used. Heretofore
in constructing such descriptions of furnaces, the separate bars of which a
furnace has been composed have been so connected that the chain of bars is
necessarily broken, when some of the bars have to be removed, which arrange-
ment is consequently open to objections.
Now, my improvements consist of constructing an endless chain of the
desired length of parallel plates, connected together at each end by bolts, and
kept separate by washers or projections. And in order to attach the fire bars
to this chain, the fire bars (which are short) have each a descending projection

page_text: with a hole through it, and there is a hole through each of the plates of which
the chain is composed, through which holes in the chain, and through holes in
each of the projections of the bars, bolts pass, which retain the short bars
parallel to each other, and attach them to the chain, so as to make up a
complete endless chain of short bars, and so also that any of the short bars
may be removed and replaced without separating the endless chain.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Juckes in the Great Seal Patent Office on the 29th
February 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
JUCKES, of 18, Baker Street, Lloyd Square, Islington, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirtieth day of August, in the year of our Lord One
thousand eight hundred and fifty-five, in the nineteenth year of Her reign, did,
for Herself, Her heirs and successors, give and grant unto me, the said John
Juckes, Her special licence that I, the said John Juckes, my executors, adminis-
trators, and assigns, or such others as I, the said John Juckes, my executors,
administrators, and assigns, should at any time agree with, and no others, from
time to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the United
Kingdom of Great Britain and Ireland, the Channel Islands, and Isle of Man,
an Invention for "IMPROVEMENTS IN FURNACES," upon the condition (amongst
others) that I, the said John Juckes, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Juckes, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say:-
This Invention consists of improvements in arranging the fire bars of
furnaces where continuous or endless chains of fire bars are used.

page_text: Heretofore in constructing such descriptions of furnaces, the separate bars
of which a furnace has been composed have been so connected that the
chain of bars is necessarily broken, when some of the bars have to be removed,
which arrangement is consequently open to objections.
Now, my improvements- consist of constructing an endless chain of the
desired length of parallel plates, connected together at each end by bolts, and
kept separate by washers or projections. And in order to attach the fire bars
to this chain, the fire bars, which are short, have each a descending projection
with a hole through it, and there is a hole through each of the plates of which
the chain is composed, through which holes in the chain, and through holes
in each of the projections of the bars, bolts pass, which retain the short bars
parallel to each other, and attach them to the chain so as to make up a
complete endless chain of short bars, and so also that any of the short bars
may be removed and replaced without separating the endless chain.
Having thus stated the nature of my said Invention, I will proceed more
fully to describe the manner of performing the same.
DESCRIPTION OF THE DRAWING.
Figure 1 is a plan of part of a set of fire bars, and Figure 2 is an edge
view thereof. a, a, are the short bars, which are arranged to break joint. Each
of these short bars is made with a projection a¹ with a hole through it, as
shown; b, b, is a chain, consisting of short plates, connected by pins or axes b¹.
Hence it will be seen that the bars a are independent of the chain, and the
combination is such, that any of the bars a may be removed and replaced by
fresh ones without separating the chain b, b, which carries the bars a; at the
same time the bars a, a, are independent of each other, and they are only con-
nected when the bars a, a, are attached to the chain b, b.
which the chain is formed, I prefer to be of wrought iron,
bars a, a, to be of cast iron, but this is not essential.
or axes 6', which make the plates 6 into a continuous chain, the pins or axes
c, c, are used to retain the bars a, a, in their places, so that by withdrawing
one of pins or axes c, the bars a across the chain will all be released, and be
readily changed. Each of the plates b is formed with projections 62, or washers
are used to keep the parts sufficiently apart to admit of the passage of air
through between the bars a to the fuel placed on them.
The plates b, of
and the short fire
In addition to the pins
Having thus described the nature of my said Invention, and the manner of
performing the same, I would remark that I do not confine myself to the precise
forms of the parts or to the details described and shown, so long as the short

page_text: bars used, and the chain employed to carry them, are made in such manner
that the short bars a may be taken out, replaced, and fixed to the chain
without separating the chain.
In witness whereof, I, the said John Juckes, have hereunto set my
hand and seal, this Twenty-ninth day of February, in the year of our
Lord One thousand eight hundred and fifty-six.
Witness,
B. GOBEY,
4, Old Square, Lincoln's Inn.
JNO. JUCKES. (LS.)