IMPROVED MEANS FOR SUPERHEATING STEAM
Year: 1862

page_text: LETTERS PATENT to George Augustus Huddart, of Brynkir, in the County
of Carnarvon, Gentleman, for the Invention of "IMPROVED MEANS FOR
SUPERHEATING STEAM."
Sealed the 18th November 1862, and dated the 26th May 1862.
PROVISIONAL SPECIFICATION left by the said George Augustus Huddart
at the Office of the Commissioners of Patents, with his Petition, on the
26th May 1862.
I, GEORGE AUGUSTUS HUDDART, of Brynkir, in the County of Carnarvon,
Gentleman, do hereby declare the nature of the said Invention for "IMPROVED
MEANS FOR SUPERHEATING STEAM," to be as follows:-
The object of this Invention is to effect the superheating of steam in a more
efficient and economical manner than heretofore, the amount superheated
being regulated according to the requirements of the engine to be driven.
To this end I withdraw from an ordinary steam boiler, by the aid of a force
pump, the steam to be superheated, and discharge it into a superbeating
chamber or suitable receptacle, which receives its heat from a furnace or flues into

page_text: which it is built. The superheater may conveniently be fitted with a serpen-
tine pipe or a range of parallel pipes for receiving the steam from the boiler,
as this arrangement will allow of the flame and heated gases of the furnace
playing round an extended heating surface; by cutting off from the boiler the
steam to be superheated I am enabled to raise its temperature very rapidly,
and while dealing with comparatively small quantities, to give the engine to
be driven an ample supply; moreover, a high initial force imparted to the
superheated steam will not necessitate a corresponding power of resistance in
the boiler, the duty of resisting that force being confined to the super-
heater.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Augustus Huddart in the Great Seal Patent
Office on the 26th November 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
AUGUSTUS HUDDART, of Brynkir, in the County of Carnarvon, Gentleman,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-sixth day of May, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-fifth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said George Augustus Huddart, Her special license, that I, the said
George Augustus Huddart, my executors, administrators, and assigns, or such.
others as I, the said George Augustus Huddart, 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 "IMPROVED MEANS FOR SUPERHEATING STEAM," upon the con-
dition (amongst others) that I, the said George Augustus Huddart, 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 George Augustus Huddart, 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 (that is to say) :-
This Invention relates to the use of certain means for effecting the super-
heating of steam more efficiently and economically than heretofore, the object
being greatly to increase the motive force of the steam after leaving the boiler
and before introducing it to the engine. The amount of steam superheated
will be regulated according to the requirements of the engine to be driven.
Instead of conducting the steam as it leaves the boiler where it is generated
through a coil, or pipe, or steam passages situate in the flues of an ordinary
steam boiler, and thus superheating it in its passage to the engine, which is the
plan generally adopted, I withdraw the steam from the boiler by the aid of a
force pump, aud discharge it under pressure into a superheating chamber or
oven which receives its heat from a furnace or furnace flues into which it is
so built that the flame and heated gases may play around it. This super-
heater I propose to fit with a series of parallel copper tubes somewhat like
those in a locomotive engine, through which the gases of combustion will pass.
Thus the volume of steam pumped into the superheater will be brought into
contact with an extended heating surface, whereby the temperature and elastic
force of the steam will be rapidly and economically increased. By cutting off
from the boiler given quantities of steam to be superheated and acting upon it
while thus isolated, I not only raise its temperature very rapidly, but am
enabled to impart to it a high initial force without requiring a corresponding
power of resistance in the steam generator, the duty of resisting that force
being confined to the superheater or surcharging chamber, which, as compared
with the boiler will be of small capacity. Thus for example, supposing I am
employing a boiler suitable for generating steam at the low maximum pressure
of twenty-five pounds, I may throw this steam by means of a force pump into
the superheater at a rate about equal to its required consumption by the
engine to be driven, and raise it rapidly to say, fifty pounds or more, at which
pressure it may be used without putting any increased stress upon the boiler.
In general the waste heat from the steam boiler furnace will suffice to heat
the superheating chamber, which may be of any approved construction provided
it is capable of resisting the expansive force of steam when superheated.
Ilaving now set forth the nature of the Invention of "Improved Means for
Superheating Steam," and explained the manner of carrying the same into
effect, I wish it to be understood that under the above in part recited Letters

page_text: Patent I claim increasing the initial force of steam in the manner and for the
purpose above described.
In witness whereof, I, the said George Augustus Huddart, have hereunto
set my hand and seal, the Twenty-second day of November, in the
year of our Lord One thousand eight hundred and sixty-two.
Witness,
G. A. W. HUDdart,
Brynkir,
Carnarvonshire.
GEO. A. HUDDART. (L.s.)