IMPROVEMENTS IN MEANS FOR PROMOTING ECONOMY IN FUEL IN STEAM GENERATORS
Year: 1873

page_text: LETTERS PATENT to John Oldham, junior, of Chorlton-upon-Medlock,
in the County of Lancaster, Mechanic, for the Invention of
"IMPROVEMENTS IN MEANS FOR PROMOTING ECONOMY IN FUEL IN STEAM
GENERATORS."
Sealed the 24th October 1873, and dated the 28th April 1873.
PROVISIONAL SPECIFICATION left by the said John Oldham, at the
Office of the Commissioners of Patents, with his Petition, on the
28th April 1873.
I, JOHN OLDHAM, junior, of Chorlton-upon-Medlock, in the County of
Lancaster, Mechanic, do hereby declare the nature of the said In-
vention for "IMPROVEMENTS IN MEANS FOR PROMOTING ECONOMY IN FUEL
IN STEAM GENERATORS," to be as follows:-
My Invention relates more particularly to Cornish or internal flued
boilers or steam generators, but is or may be also applicable to other
descriptions of boilers or steam generators.
When carrying my said Invention into practical effect, I, in the first
place, dispense with the ordinary brickwork bridge, and I substitute
therefor an arrangement of water pipes or tubes, which communicate
with the water space of the boiler and through which the feed water is

page_text: forced. The said pipes or tubes are preferably arranged in a vertical or
nearly vertical position and form, or may form a continuous passage
for the flow of water into the boiler, the said water becoming highly
heated, and thereby promoting economy in the consumption of fuel.
In the second place I fix a curved water chamber, or two or more of
such water chambers, to the rearward end of the boiler, the said
chamber or chambers being situated above the exit end or ends of the
internal flucs, and assisting in the heating of the feed water or in the
generation of steam, as the case may be.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Oldham, in the Great Scal Patent Office
on the 28th October 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
OLDHAM, junior, of Chorlton-upon-Medlock, in the County of Lancaster,
Mechanic, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of April, 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 and
grant unto me, the said John Oldham, junior, Her special license that I,
the said John Oldham, junior, my executors, administrators, and assigns,
or such others as I, the said John Oldham, junior, my executors, admini-
strators, 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 MEANS
FOR PROMOTING ECONOMY IN FUEL IN STEAM GENERATORS," upon the condition,
amongst others, that I, the said John Oldham, junior, 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.

page_text: NOW KNOW YE, that I, the said John Oldham, junior, 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 (and accompanying Drawings), that is
to say:
""
My Invention relates more particularly to "Cornish or internal flued
boilers or steam generators, but is or may be also applicable to other
descriptions of boilers or steam generators.
When carrying my said Invention into practical effect, I, in the first
place, dispense with the ordinary brickwork bridge, and I substitute
therefor an arrangement of water pipes or tubes, which communicate
with the water space of the boiler and through which the feed water is
forced. The said pipes or tubes are preferably arranged in a vertical or
nearly vertical position, and form or may form a continuous passage for
the flow of water into the boiler, the said water becoming highly
heated, and thereby promoting economy in the consumption of fuel.
And in order that my said Invention may be fully understood I have
supplied a Sheet of Drawings to accompany this Specification, to which
Drawings I will now refer.
Fig. 1, drawn about one sixteenth of the full size, represents a vertical
longitudinal section of the front portion of a cylindrical "Galloway"
boiler with my Invention applied thereto, Fig. 2 being a plan,
Fig. 3 a cross section, and Fig. 4 a front elevation of the same. In the
said Figures, or in some of them, a is the brickwork foundation, which
in ordinary cases is extended upwards to form the fire bridge, and b, b,
are the water tubes. The said tubes are formed by connecting together
short pieces of straight tubing by means of bends, so as to produce a
pipe of the surpentine form, represented in Fig. 3, or of a form similar
thereto, or such form may be obtained by bending a tube of copper or
other suitable material. In the example illustrated two serpentine pipes
are arranged in a vertical position, one behind the other; the straight
or nearly straight parts of the front pipe being opposite to the spaces
between the corresponding parts in the back pipe. The feed water is
conveyed from the feed pump or feeding apparatus through the pipe c
to the pipes b, b. In the example the water is conveyed by the
horizontal pipe d to the left-hand end of the front range, through which
range the water flows in the direction of the arrows, and is conveyed
through the bende to the back range, through which it flows into the

page_text: pipe f. The pipe f is connected with a pipe 9, which is in con-
nection with the horizontal perforated pipe situated within the
boiler. The pipe h delivers the heated feed water at or near the surface
of the water in the boiler; but to this arrangement I do not confine
myself. In the example a blow-off cock is fitted at i, and stop valves
at k, k, and in addition to these I prefer to apply a blow-off pipe 1,
which is connected with the pipe h, and is fitted with a valve, whereby
the pipe may be caused to act as a scummer. The manner in
which my Invention may be applied to Cornish and other forms of
boilers will be understood when the said Drawings are examined. In
some cases I fix a curved water chamber over the exit end of the
internal flue, or of each internal flue, as represented at n in Fig. 5, such
chamber being supplied with water from the generator, or the feed
water may pass through the said chamber into the generator.
Having now fully described my said Invention, and the manner in
which I carry the same into practical effect, I would in conclusion have
it to be understood that I claim :-
First. The tubes b, b, fitted and arranged substantially as and for
the purpose herein-before set forth and indicated.
And lastly. The water chamber n formed and arranged substantially
as herein-before set forth and indicated.
In witness whereof, I, the said John Oldham, junior, have here-
unto set my hand and seal, this Twenty-seventh day of October,
in the year of our Lord One thousand eight hundred and seventy-
three.
Signed and sealed by the
said John Oldham, junior,
in the presence of
EDWARD K. DUTTON,
Agent for the Patentec,
3, Princess Street,
Manchester.
JOHN OLDHAM, JUN³. (L.S.)