IMPROVEMENTS IN FURNACE BARS
Year: 1856

page_text: PROVISIONAL SPECIFICATION left by the said John Juckes at the
Office of the Commissioners of Patents, with his Petition, on the
22nd March 1856.
I, JOHN JUCKES, of Dame Street, Islington, do hereby declare the nature of
the Invention for "IMPROVEMENTS IN FURNACE BARS," to be as follows:-
Heretofore furnace bars, when they have been in short lengths, and mado
into a continuous chain, have not without considerable inconvenience admitted
of one bar being readily replaced by another, but the chain of bars has had to
be divided across in order to take out one or more bars when broken, worn, or
injured, in order that it or they might be replaced by another or others, and
this was by reason of the transverse pins or axes (which couple the short bars
into a chain) being of a cylindrical form passing through circular holes in the
bars. Now, my improvements consist of making the circular holes in the bars
with narrow outlets below, and to employ transverse pins or axes with the sides
reduced or cut away, so that the diameter of each in one direction may be less
than in the other direction; the larger diameter agreeing with the diameter of
the holes through the bars, and the smaller diameter agreeing with the outlet;
hence, admitting of a bar being removed when such axes are placed and held'
in one direction, but not admitting of the bars being removed from the axes or
pins when such axes or pins are turned in the other direction. And in order
to keep the parts at proper distances apart, I sometimes insert into and fix
within the holes through the short bars tubes of the proper length required for
this purpose.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Juckes in the Great Seal Patent Office on the
22nd September 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
JUCKES, of Dame Street, Islington, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent bearing date the Twenty-second day of March, in the year of our
Lord One thousand eight hundred and fifty-six, 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
exccutors, 'administrators, 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 FURNACE BARS,"
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 performed,
to be particularly described and ascertained in and by the following statement
thereof, that is to say :-
Heretofore furnace bars, when they have been in short lengths, and made
into a continuous chain, have not without considerable inconvenience admitted
of one bar being replaced by another, but the chain of bars has had to be divided
across in order to take out one or more bars when broken, worn, or injured, in
order that it or they might be replaced by another or others, and this was by
reason of the transverse pins or axes (which coupled the short bars into a chain)
being of a cylindrical form passing through circular holes in the bars. Now, my
improvements consist of making the circular holes in the bars with narrow
outlets below, and to employ transverse.pins or axes with the sides reduced or
cut away, so that the diameter of each in one direction may be less than in the
other direction; the larger diameter agreeing with the diameter of the holes

page_text: through the bars, and the smaller diameter agreeing with the outlet; hence,
admitting of a bar being removed when such axes are placed and held in one
direction, but not admitting of the bars being removed from the axes or pins
when such axes or pins are turned in the other direction.
And in order that my said Invention may be most fully understood, and
readily carried into effect, I will proceed to describe the Drawing hereunto
annexed.
DESCRIPTION OF THE DRAWING.
Figure 1 is a side view, Figure 2 a plan, and Figure 3 a section of part of a
chain of furnace bars constructed according to my Invention. A, A, are the
furnace bars of which the body of the chain is made up; B, B, are the furnace
bars, such as are used for the outside of the chain; C, C, are the pins or axes
by which the bars are connected together into a chain. These pins or axes are
not circular in section as heretofore, but they have two flat sides, as shewn by
the separate views of one of the pins C, seen at Figure 4. In the furnace
bars A, A, B, B, are holes through which the pins C pass as heretofore, and
these holes are of such a size as to allow the bars to turn freely on the pins.
.
c, c, are
From the lower part of the holes in the bars A are passages or outlets of less
width than the diameter of the holes, but sufficiently wide to allow the bar to
be dropped on to or removed from the pin or axis C, when such pin or axis is
turned with its longer diameter upwards; but when the pin or axis is turned
in the other direction the furnace bars are perfectly secured thereon.
keys passing through the ends of the pins C, and fitting into notches in the
bosses of the outside bars B. These keys prevent the pins C turning while
the chain of furnace bars is at work; but when it is wished to remove a furnace
bar it is easily done by taking out the keys c, c, of two of the pins C, C, and
turning them oue quarter round; when in this position they will allow of the
bar being lifted off.
In witness whereof, I, the said John Juckes, have hereunto set my
hand and seal, this Twenty-second day of September, in the year of
our Lord One thousand eight hundred and fifty-six.
Witness,
GEO. PITT,
4, Old Square.
JNO JUCKES. (L.S.)