IMPROVEMENTS IN THE CONSTRUCTION AND ARRANGEMENT OF MARINE AND OTHER BOILER FIRE-PLACES OR FURNACES.
Year: 1873

page_text: LETTERS PATENT to John Martin Stanley, of Sheffield, in the County
of York, Ironfounder, for the Invention of "IMPROVEMENTS IN THE
CONSTRUCTION AND ARRANGEMENT OF MARINE AND OTHER BOILER FIRE-PLACES
OR FURNACES.
"
PROVISIONAL SPECIFICATION left by the said John Martin Stanley
at the Office of the Commissioners of Patents, with his Petition, on
the 29th May 1873.
I, JOHN MARTIN STANLEY, of Sheffield, in the County of York, Iron-
founder, do hereby declare the nature of my said Invention for "IMPROVE-
MENTS IN THE CONSTRUCTION AND ARRANGEMENT OF MARINE AND OTHER BOILER
FIRE-PLACES OR FURNACES," to be as follows:-
This Invention relates to a peculiar construction and arrangement of
the fire-places or furnaces of marine and other boilers, whereby economy

page_text: of fuel is effected and the stoke hole is kept much cooler than when the
ordinary furnaces are employed, which is a great desideratum on board
ship.
My improvements have special reference to the arrangement for
admitting air into the furnace, and to the construction of the furnace
itself.
In carrying out my Invention I make the furnace bottom solid, and
close up the front with a tight fitting fire-door, the lower part of which
is made to open for facilitating the removal of the ashes from time to
time. In the sides of this furnace I form a number of air passages or
inlets, communicating freely with the external atmosphere through one
or more funnel or trumpet-shaped induction pipes. A jet of steam is
caused to enter each pipe, and to induce along with it a current of air,
as is well understood, the air thus induced entering the before-mentioned
passages and escaping therefrom directly into and amongst the fuel, so
as to mingle with the gases evolved therefrom, the resulting flame
passing at once under the boiler, or through the tubes or flues therein.
As the air is thus forced into the furnace a certain amount of pressure
will be maintained therein, rendering the furnace less dependent on the
chimney for its draught. The spaces between the several air inlots
inside the furnace may form water chambers or tubes in communication
or not with the boiler, and thus assist in the direct generation of steam,
or in the heating of the feed water.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Martin Stanley in the Great Seal Patent 24
Office on the 27th November 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MARTIN STANLEY, of Sheffield, in the County of York, Ironfounder, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her 30
Letters Patent, bearing date the Twenty-ninth day of May, in the year of
our Lord One thousand eight hundred and seventy-three, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors, give

page_text: and grant unto me, the said John Martin Stanley, Her special license
that I, the said John Martin Stanley, my executors, administrators,
and assigns, or such others as I, the said John Martin Stanley, my
executors, administrators, or 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 "Im-
PROVEMENTS IN THE CONSTRUCTION AND ARRANGEMENT OF MARINE AND OTHER
BOILER FIRE-PLACES OR FURNACES," upon the condition (amongst others)
that I, the said John Martin Stanley, my executors or administrators, by
an instrument in writing under my hand and seal, 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 Martin Stanley, 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 accompanying
Drawings, and to the letters and figures marked thereon, that is to
say :-
My said Invention relates to a peculiar construction and arrangement
of the fire-places or furnaces of marine and other boilers, whereby
economy of fuel is effected, and the stoke hole is kept much cooler
than when the ordinary furnaces are employed, which is a great
desideratum on board ship.
My improvements are based on a peculiar mode of supplying air to a
steam boiler furnace of peculiar construction.
may
In carrying out my Invention I make the furnace bottom solid, and
close up the front with a tight fitting fire-door, the lower part of which
be made to open for facilitating the removal of the ashes from time
to time, or a separate ash door may be provided. In the sides of this
furnace I form a number of air passages or inlets, communicating freely
with the external atmosphere through one or more bell-mouthed induc-

page_text: Figure 3 is a section of the furnace at 1, 2, but shewing the sides of
the furnace, which form also the air chambers B, B, as composed of
suitable shaped fire-brick blocks i, i, in lieu of being composed of cast-
iron plates, covered with silica, as previously described, the air nozzle c, c,
being simply openings made through the blocks themselves. In all
other respects the arrangement is the same as that described with
reference to Figures 1 and 2.
In Figure 4 I have shewn in longitudinal vertical section my improved
furnace as constructed with a water fire-box; Figure 5 is a transverse
vertical section of the same, taken along the line 3, 4; and Figure 6 is
a front elevation thereof. The actual fire-box k is of copper, and between
it and the bottom of the flue and the side plates a, which form the air
chambers B, B, there is left a water space 1, 1, ferrule stays m, with stay
bolts inside, serving to connect the closed bottom of the fire-box with the
bottom of the flue A and side plates a of the air chambers. The air
nozzles c, c, consist of copper tubes screwed or otherwise secured into
the two plates k and a. n, n, are holes for the free circulation of the
water in the boiler under the bottom and behind the sides of the fire-box.
The bridge is composed of fire-brick blocks e, e, as before described.
ff, are the bell mouths opening into the air chambers B, B; g, the jet
nozzles; and h, the steam pipes. The fire-door is shewn at O, the ash
door at D, and the mud hole door and bridle at E in Figure 6.
Figure 7 is a transverse section through 3, 4, which differs only from
Figure 5 in the construction of the air chambers and nozzles, the air
chambers in this modification being composed of cast-iron pipes B, having
branch nozzles c cast thereon, rivetted or otherwise secured by flanges to
the sides of the copper fire-box k.
Having now described and particularly ascertained the nature of my
said Invention, and the manner in which the same is or may be used or
carried into effect, I would observe in conclusion that I lay no claim
separately to the construction or use of a boiler furnace with a closed or
solid bottom, neither do I claim separately the inducing of air into a
furnace by the aid of steam jets, but what I consider to be novel and
original, and therefore claim as the Invention secured to me by the
herein-before in part recited Letters Patent is, the peculiar construction
and arrangement of steam boiler furnaces, supplied with air substantially

page_text: In witness whereof, I, the said John Martin Stanley, have to this
my Specification set my hand and seal, this Twenty-sixth day of
November, One thousand eight hundred and seventy-three.
Witness,
WM. CHARLTON.
JOHN M. STANLEY. (L.S.)