IMPROVEMENTS IN STEAM GENERATORS STEAM GENERATORS
Year: 1869

page_text: LETTERS PATENT to John Loader, of Finsbury; in the County of
Middlesex, for the Invention of "IMPROVEMENTS IN STEAM GENERATORS."
Sealed the 17th August 1869, and dated the 19th February 1869.
PROVISIONAL SPECIFICATION left by the said John Loader at
the Office of the Commissioners of Patents, with his Petition, on
the 19th February 1869.
I, JOHN LOADER, of Finsbury, in the County of Middlesex, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN STEAM
GENERATORS," to be as follows:-
The main feature of my Invention consists in leading the steam pipe
or tube through the main body of the water in the steam generator or
boiler.
In carrying out my Invention I fit in the generator or boiler a pipe
one end of which is above the water line and open, so that the steam
generated enters therein. This pipe is led through the water in a spiral,
worm, or other desired form, and I prefer that it should occupy as much

page_text: space as possible in the water. The opposite end of the pipe is carried
through the shell of the generator at any convenient part, and is led to
the engine.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Loader in the Great Seal Patent Office on
the 19th August 1869.
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TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
LOADER, of Finsbury, in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Nineteenth day of February, in the year
of our Lord One thousand eight hundred and sixty-nine, in the thirty-
second year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said John Loader, Her special licence that I, the
said John Loader, my executors, administrators, and assigns, or such
others as I, the said John Loader, 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 "IMPROVEMENTS IN STEAM GENERATORS," upon
the condition (amongst others) that I, the said John Loader, my exe-
cutors 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 John Loader, do hereby declare
the nature of the said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement thereof, that is to say
The Invention has for its object improvements in steam generators,
For this purpose I lead the steam pipe or tube through the main body
of the water in the steam generator or boiler.

page_text: In carrying out my Invention I fit in the generator or boiler a pipe
or a series of pipes or steam passages one end of which is above the
water line and open to the steami dome or space, so that the steam
generated in the boiler enters therein. The pipe or pipes or steam
passages are led through the water in a spiral, worm, or other desired
form; and I prefer that they should occupy as much space as possible in
the water, but so as to leave thin films or bodies of water between them.
The opposite end of the pipe is carried through the shell of the generator
any convenient part, and is then led to the engine.
at
And in order that my Invention may be more fully understood, and
readily carried into effect, I will proceed, aided by the accompanying
Drawings, more fully to describe the same.
Figure 1 is a longitudinal section, and Figure 2 is a transverse section
of a Cornish boiler having my improvements applied thereto. a, a, is
the shell of the boiler, and b is the dome or steam space into which
are led the open upper onds of the steam pipes c, e', c². These pipes
after being led to and fro in the main body of water in the boiler are
connected to the steam pipe c³, one end of which is carried through the
shell of the boiler, as shewn.
Figure 3 is a section of a vertical boiler having a single coil of steam
pipe fixed therein, as shewn, one end of such pipe c being open to
the dome or steam space b, whilst the other end of the steam pipe c is
carried through the shell of the boiler. By these means a thorough
circulation of the water in the boiler is maintained and steam is more
rapidly generated than heretofore, whilst the steam passing off from
the boiler or generators is in its passage suitably dried or superheated, and
the evils resulting from the presence of a large body of water in the
boiler are to a great degree obviated.
I would here remark that although I have only shewn and described
the application of my Invention to two descriptions of steam boilers
or generators it is equally applicable to other descriptions of boilers
having large or small water spaces, whilst the form and number of the
steam pipes or tubes and the course they take through the water in the
boiler may be varied as desired.
Having thus described the nature of my said Invention, and the
mode in which I carry the same iuto effect, I would have it understood
that I do not confine myself to the precise details herein shewn and

page_text: described as such may be varied without departing from the nature of
my Invention; but what I do claim is, leading the steam pipe, pipes,
or passages in a circuitous or serpentine course through the main body
of the water in the steam boiler or generator, in manner and for the
purpose substantially as herein shewn and described.
In witness whereof, I, the said John Loader, have hereunto set my
hand and seal, this Twentieth day of May, in the year of our Lord
One thousand eight hundred and sixty-nine.
Witness,
FRED. HARRIS,
Patent Agent,
35, Southampton Buildings.
JOHN LOADER. (L.S.)