IMPROVEMENTS IN MARINE STEAM *BOILERS AND IN SETTING THE SAME.
Year: 1874

page_text: LETTERS PATENT to Thomas Ridley Oswald, Alfred Oswald, and
William Rudd Oswald, all of Sunderland, in the County of
Durham, for the Invention of "IMPROVEMENTS IN MARINE STEAM
*BOILERS AND IN SETTING THE SAME. "
BOILERS AND IN SETTING THE SAME. "
Sealed the 28th August 1874, and dated the 2nd July 1874.
PROVISIONAL SPECIFICATION left by the said Thomas Ridley Oswald,
Alfred Oswald, and William Rudd Oswald at the Office of the
Commissioners of Patents, with their Petition, on the 2nd July
1874.
We, THOMAS RIDLEY OSWALD, ALFRED OSWALD, and WILLIAM RUDD
OSWALD, all of Sunderland, in the County of Durham, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN MARINE STEAM
BOILERS AND IN SETTING THE SAME," to be as follows:-
The boiler we construct is of a round or other form fitted with small
flame tubes similar to those used in ordinary tubular boilers. The
boiler is fired underneath externally, and has two separate fires to each
boiler. The flame after leaving the furnace travels right along under-

page_text: hole on account of the intense heat, the advantages of this boiler will
be invaluable, for the stoke hole will be comparatively cool on account.
of the prevention of extreme heat from useless and wasteful radiation.
12thly. Blocks and all other woodwork over and adjacent to the boiler
space will be much more preserved when these boilers are used than.
when the ordinary ones are, as no lost heat escapes from the surface of
same.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Ridley Oswald, Alfred Oswald, and
William Rudd Oswald in the Great Seal Patent Office on the 2nd
January 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
RIDLEY OSWALD, ALFRED OSWALD, and WILLIAM RUDD OSWALD, all
of Sunderland, in the County of Durham, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent bearing date the Second day of July, in the year
of our Lord One thousand eight hundred and seventy-four, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said Thomas Ridley Oswald;
Alfred Oswald, and William Rudd Oswald, Her special license. that
we, the said Thomas Ridley Oswald, Alfred Oswald, and William
Rudd Oswald, our executors, administrators, and assigns, or such.
others as we, the said Thomas Ridley Oswald, Alfred Oswald, and
William Rudd Oswald, our 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 MARINE STEAM BOILERS
AND IN SETTING THE SAME," upon the condition (amongst others) that we,
the said Thomas Ridley Oswald, Alfred Oswald, and William Rudd
Oswald, our executors or administrators, by an instrument in writing
under our or their hands and seals, or under the hand and seal of one
of us or them, should particularly describe and ascertain the nature

page_text: of the said Invention, and in what manner the same was to be per-
formed, 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 Ridley Oswald, on behalf
of myself and the said Alfred Oswald and William Rudd Oswald, do
hereby declare the nature of the said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof, that is to say':—
C
The boiler we construct is of a round or other form fitted with small
flame tubes (as shewn in the Drawings annexed) similar to those used
in ordinary tubular boilers. The boiler is fired underneath externally,
and has two separate fires to each boiler. The flame after leaving the
furnace travels right along underneath the boiler, and returns to the
front of the boiler from the back combustion chamber through the small
tubes to the front combustion chamber, from thence it travels along
flues at the sides of the boiler to the chimney or uptake. The boiler is
supported or built in with brickwork, cement, fire-clay, or other slow
heat conducting materials encased in a wrought or cast iron ribbed or
other casing.
-
In the Drawings the boiler is marked A, the slow heat conducting
material B, and the iron casing C. The casing shewn in the Drawings
encloses two boilers set in the manner above described; but this may
be varied, as a separate casing may be used for each boiler and
setting, or a greater number of boilers may be enclosed by a single
casing.
Other boilers may be used with a similar setting, such as a boiler fired
internally by means of two or more fire tubes to cach boiler with
chamber at end of these fire tubes (or furnaces), and with small tubes
at the end of the chamber. The flame to travel from furnace to
chamber, then through tubes and back again underneath boiler to side
flues through which it returns to back of boiler, and from thence to
chimney or uptake.
The advantages derived from the above construction are,-

page_text: 2. The combined arrangement of setting for steam boilers, substan-
tially as herein described.
In witness whereof, I, the said Thomas Ridley Oswald, have here-
unto set my hand and seal, this Thirtieth day of December, in
the year of our Lord One thousand eight hundred and seventy-
four.