IMPROVE- MENTS IN FURNACE BARS
Year: 1875

page_text: LETTERS PATENT to Thomas Samuel Dobson, of the Town and
County of the Town of Nottingham, for the Invention of "IMPROVE-
MENTS IN FURNACE BARS,"
PROVISIONAL SPECIFICATION left by the said Thomas Samuel
Dobson at the Office of the Commissioners of Patents, with his
Petition, on the 25th May 1875.
I, THOMAS SAMUEL DOBSON, of the Town and County of the Town of
Nottingham, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN FURNACE BARS," to be as follows:-
I employ straight, curved, or reticulated bars, having their ends of
such shape that the edges, curves, or reticulations will be held at the
requisite distance from the reverse edges, curves, or reticulations of the
next adjoining bars; in section each bar is thicker on the upper or fuel
bearing side than the under side, each bar being likewise pierced with
a number of holes, cach such hole being larger on the lower side than

page_text: the top side, thus causing a considerable amount of air to pass into the
furnace in addition to that which passes between the spaces formed by
the edges, curves, or reticulations of the bars.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Samuel Dobson in the Great Soal Patent {
Office on the 13th November 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
SAMUEL DOBSON, of the Town and County of the Town of Nottingham,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fifth day of May, in the year
of our Lord One thousand eight hundred and seventy-five, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Thomas Samuel Dobson, Her special
licence that I, the said Thomas Samuel Dobson, my executors, admini-
strators, and assigns, or such others as I, the said Thomas Samuel Dobson,
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 "In-
PROVEMENTS IN FURNACE BARS," upon the condition (amongst others) that
I, the said Thomas Samuel Dobson, 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 Thomas Samuel Dobson, do hereby :
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in
and by the following statement, reference being had to the accom-
panying Drawings forming a part of this Specification :-

page_text: I employ straight, curved, or reticulated bars having their ends of
such shape that the edges, curves, or reticulations will be held at the
requisite distance from the reverse edges, curves, or reticulations of the
next adjoining bars; in section each bar is thicker on the upper or fuel
bearing side than the under side, each bar being likewise pierced with a
number of holes, each such hole being larger on the lower side than the
top side, thus causing a considerable amount of air to pass into the
furnace in addition to that which passes between the spaces formed by
the edges, curves, or reticulations.
'
My Invention consists in forming curves or reticulations upon one or
both edges of each furnace bar. The ends of each bar are formed of
such shape that the edges, curves, or reticulations will be held the
requiste distance from the edges, curves, or reticulations of the next
adjoining bar or bars. Each bar is likewise pierced with a number of
-holes, which with the spaces between the bars, cause a greater amount
of air to pass into the furnace than is possible with the furnace hars
heretofore employed.
Figure 2 is a side elevation of portion of one such bar.
Figure 3, a view of the under side of portion of one of the central
.bars B.
At Figure 1 A and C are the outer bars, each of which may have lugs
or projections on one side, as seen on the bar A, the opposite side being
; curved or reticulated to correspond with the curves or reticulations of
the central bars B, the number of which will depend upon the width of
the furnace in which they are employed.. The bars are shown one half
the full size as to width, but the number of curves or reticulations will
depend upon the length of the bars employed. The ends of each bar
determine the space between it and the next adjoining bar or bars, each
of which are pierced with a number of holes F, which are bevilled
outwards on their lower side, the edges, curves, or reticulations being
_bevilled inwards, thus forming the upper or fuel bearing side larger than
the under side, the grooves E-formed by such-bevilling-are-seen in the...
5 side elevation at Figure 2, and the-under side view at Figure 3,

page_text: For the purpose of readily fitting my improved bars to furnaces having
irregular shaped sides I form one or both of the outer bars with studs or
projections D upon one side, which studs gradually increase in length.
Such studs can be readily broken off so as to fit the bar to the irregular
side of the furnace.
Having thus fully described the nature of my said Invention, and the
manner of performing the same, I wish it understood that I claim the
general arrangement and combination of furnace bars, substantially as
herein-before described and illustrated in the accompanying Drawings.
In witness whereof, I, the said Thomas_Samuel Dobson, have here- 1
unto set my hand and seal, this Second day of November, in
the year of our Lord One thousand eight hundred and seventy-
five.
Witness,
H. W. Gough, C.E.,
Nottingham.
THOMAS SAMUEL DOBSON. (L.S.)