AN IMPROVED ARRANGEMENT OF FIRE-BARS
Year: 1874

page_text: LETTERS PATENT to William Arena Martin, of No. 80, Fleet Street,
in the City of London, Engineer, for the Invention of "AN IMPROVED
ARRANGEMENT OF FIRE-BARS."
Sealed the 4th September 1874, and dated the 11th March 1874.
"
PROVISIONAL SPECIFICATION left by the said William Arena
Martin at the Office of the. Commissioners of Patents, with his
Petition, on the 11th March 1874.
•
I, WILLIAM ARENA MARTIN, of No. 80, Fleet Street, in the City of
London, Engineer, do hereby declare the nature of the said Invention
for "AN IMPROVED ARRANGEMENT OF FIRE-BARS," to be as follows:-
+
I use fire-bars of square wrought iron a few inches longer than the
furnace in which they are placed, so that the ends of them project out-
side the front of the furnace below the dead plate.
Each alternate fire-bar is made slightly longer than its fellow, and
may be turned round crosswise by means of a key spanner, so as to
detach any dross or clinker that may be clinging to it, and to free the
spaces between the said fire-bars for the admission of air into the
furnace.

page_text: The said fire-bars are supported underneath by cross bearing bars
having a sharp edge at the top, or by bearing bars of square iron fixed
anglewise, so that the edge of them only comes in contact with the
fire-bars.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Arena Martin in the Great Seal Patent
Office on the 9th September 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ARENA MARTIN, of 80, Fleet Street, in the City of London, Civil
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of March, in the year of our
Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Arena Martin, Her special
licence that I, the said William Arena Martin, my executors, admini-
strators, and assigns, or such others as I, the said William Arena
Martin, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times there-
after 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 "AN IMPROVED ARRANGEMENT OF FIRE-BARS," upon the condition (amongst 2
others) that I, the said William Arena Martin, my executors or admini-
strators, 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 3
calendar months next and immediately after the date of the said Letters
Patent.
{
:
NOW KNOW YE, that I, the said William Arena Martin, do hereby.
declare the nature of my said Invention, and in what manner the same

page_text: is to be performed, to be particularly described and ascertained in and
and by the following statement:—
This Invention has for its objects the more perfect developement of
combustion in steam boiler and other furnaces, increased facilities in the
working and management of the same, and economy in the consumption™
of fuel.
For effecting these purposes I use fire-bars of square wrought iron a
few inches longer than the furnace in which they are placed, so that the
ends of them project outside the front of the furnace below the dead
plate.
Each alternate fire-bar is about one or two inches longer than the next
one to it, and the end of it projects an equal distance further, as before
described, so that the said fire-bar may be turned round or over cross-
wise by means of a "key spanner" provided for that purpose. By this
operation the dross, clinker, or other matter that may be clinging to the
said fire-bar and to the fire-bars next to it is detached and the spaces
between the said fire-bars are rendered free for the admission of air to
the furnace.
The said fire-bars are supported underneath by cross bearing bars
having a sharp edge at the top, or by bearing bars of square wrought
iron fixed on their angles, so that the edge of them only comes into
contact with the said fire-bars.
The said fire-bars are not fixed or fastened, and are not supported at
the ends but lie loosely on the aforesaid cross bearing bars, and are
perfectly free for expansion & contraction.
Owing to the shallowness and plainness of the said fire-bars and their
peculiar arrangement a flat stoking iron or poker can be introduced
into the body of the fuel for the purpose of rousing or stirring the fire,
as shown in the appended Drawings. By this means the fire can be
roused or stirred without the necessity of opening the fire-door for that
purpose.
In order that the nature of the said Invention and the means by
which I effect the same may be clearly understood and described I
append to this Specification a Sheet of Drawings having figures and
letters of reference marked thereupon, the same letters being used to
denote similar parts in each Figure.

page_text: In these Drawings Figure 1 represents a front elevation of a Cornish
boiler having a set of square wrought-iron fire-bars fitted therein
according to my said improved arrangement; Figure 2 is a longitudinal
section at A, B, Figure 1; Figure 3 is a transverse section at C, D,
Figure 2: Figure 4 is a plan.
bare the cross bearing bars.
c represents the flat stoking iron or poker and the manner of using it
in connection with the said fire-bars, as herein-before described.
d shows the said "key spanner" and the manner of applying it to 1
the ends of the said fire-bars, for the purpose aforesaid.
My said Invention is applicable to and may be used in furnaces where
various kinds of fire-doors are employed, but I propose chiefly to use it
in connection with my improved fire-door, as shown in appended
Drawings.
I am aware that square wrought-iron fire-bars are publicly known and
used, but I wish it to be distinctly understood that what I claim as my
Invention is, an improved arrangement of such fire-bars as herein in this
Specification described, and in the appended Drawings illustrated.
I also claim the said "key spanner," and the afore-mentioned "flat
stoking iron," when used in connection with my "Improved Arrange-
ments of Fire-bars."
In witness whereof, I, the said William Arena Martin, have here-
unto set my hand. & seal, this Eigth day of September, in
the year of our Lord One thousand eight hundred and seventy-S
four.
:
Witness,
WILLIAM ARENA MARTIN. (L.s.)
WILLIAM WILBERFORCE VERRALL,
45, Arlington Square,
Islington,
London..