AN IMPROVED MODE OF HEATING WATER FOR THE SUPPLY OF BOLLERS AND POR OTHER DUDDOSTS
Year: 1866

page_text: LETTERS PATENT to Thomas Prideaux, of Sheffield, in the County of
York, Hotel Keeper, for the Invention of "AN IMPROVED MODE OF
HEATING WATER FOR THE SUPPLY OF BOLLERS AND POR OTHER DUDDOSTS"
Sealed the 20th July 1866, and dated the 23rd January 1866.
PROVISIONAL SPECIFICATION left by the said Thomas Prideaux at the
Office of the Commissioners of Patents, with his Petition, on the 23rd
January 1866.
I, THOMAS PRIDEAUX, of Sheffield, in the County of York, Hotel Keeper,
do hereby declare the nature of the said Invention for "AN IMPROVED MODE
OF HEATING WATER FOR THE SUPPLY OF BOILERS AND FOR OTHER PURPOSES," to be
as follows:-
My Invention relates more particularly to the heating of the water which
is supplied to the boilers of steam engines, but is applicable in any case in
which a supply of heated water is desirable. It is well known that the
supplying of water to boilers in a cold state has an injurious effect upon the
production of steam, and I propose to heat such water by forming a chamber
or receptacle into which steam is admitted, a coil or series of pipes passing
through this chamber or receptacle, and the water for the supply of the boiler

page_text: flowing through such pipes in its way to the boiler from the cistern or other
source from whence it is derived. The steam admitted to the chamber or
receptacle heats the coil or series of pipes therein, and the water passing
through such pipes in its way to the boiler thus becomes heated also. The
steam introduced into the chamber or receptacle may consist of what is
termed the waste steam of a bigh-pressure engine, or that from a steam
hammer or other machine, or any machine or apparatus. from which steam is
discharged; or a pipe might be carried to the chamber or receptacle from
that which conveys the steam from the cylinder of a condensing engine to
the condenser, a portion of such steam thereby passing to such chamber; or
the steam may be supplied from a boiler. The chamber or receptacle is
furnished with a suitable outlet for the escape of steam therefrom, in order
that when using the waste steam from a high-pressure engine or other
machine no obstruction may be offered to the due passage of such steam from
such engine or machine.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Prideaux in the Great Seal Patent Office on the
23rd July 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, J, THOMAS
PRIDEAUX, of Sheffield, in the County of York, Hotel Keeper, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-third day of January, in the year of our Lord
One thousand eight hundred and sixty-six, in the twenty-ninth year of er
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Thomas Prideaux, Her special licence that I, the said Thomas Prideaux,
my executors, administrators, and assigns, or such others as 1, the said
Thomas Prideaux, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times there-
after 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 "AN IMPROVED
MODE OF HEATING WATER FOR THE SUPPLY OF BOILERS AND FOR OTHER PURPOSES,"
upon the condition (amongst others) that I, the said Thomas Prideaux, my
executors or administrators, by an instrument in writing under my, or their,
or one of their hands and seals, should particularly describe and ascertain the

page_text: nature 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 Prideaux, do hereby declare the.
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and, by the following
statement, reference being had to the Drawing hereunto, annexed, and to
the letters and figures marked thereon (that is to say):
-
My Invention relates to the heating of the water which is supplied to the.
boilers of steam engines, but is applicable to other apparatus in which a supply
of heated water is desirable. It is well known that the supplying of water to
boilers in a cold state has an injurious effect upon the production of steam,
and I propose to heat such water by forming a chamber or receptacle into.
which steam is admitted, a coil or series of pipes passing through this chamber,
and the water for the supply of the boiler flowing through such pipes in its
way to the boiler from the cistern or other source from whence it is derived.:
The steam admitted to the chamber or receptacle heats the coil or series of
pipes therein, and the water passing through such pipes in its way to the
boiler thus becomes heated also. The steam introduced into the chamber.or
receptacle may consist of what is termed the waste steam of a high-pressure.
engine, or that from a steam hammer or other machine or apparatus. from
which steam is discharged; or a pipe might be carried to the chamber or.
receptacle from that which conveys the steam from the cylinder of a condensing.
engine to the condenser, a portion of such steam thereby passing to such.
chamber. The chamber or receptacle is furnished with a suitable outlet for
the escape of steam therefrom, in order that when using the waste steam
discharged from a high-pressure engine or other machine no obstruction may
be offered to the due passage of the steam from such engine or machine.
In the accompanying Drawing, Fig. 1 shews in side elevation an arrange-
ment of beating apparatus such as I intend to apply to a high-pressure boiler
in carrying out the above-mentioned object; Fig. 2 is a longitudinal section
of the same, shewing the internal arrangement of the heating pipes and the
course of circulation of the steam and water supply; Fig. 3 is an end view of
the heating apparatus with the dome and cover removed; and Fig. 4 is a
transverse section taken in the line 1, 2, of Fig. 2.
This apparatus which I propose to place when convenient on the top of the
boiler that is to be fed is composed of a horizontal cylinder A, fitted at its ends
with tube plates, into which is fitted a series of tubes B, B. The ends of the

page_text: cylinder are closed by dome-shaped covers C, C, the spaces enclosed by which
communicate the one by a pipe D with an elevated water supply cistern E, or
it may be with a lift or force pump, and the other by a pipe F with the bottom
of the boiler that is to be supplied with heated water. Exhaust steam is
admitted into the cylinder A by a pipe G, and after circulating around and
between the tubes B, B, it escapes at the open pipe H. For ruuning off the
condensed steam and preventing its accumulation in, the cylinder a discharge
pipe I is provided. It will now be understood that as water is passed through
the apparatus at a pressure that will ensure its discharge into the steam boiler
and as the exhaust steam-(whether from a steam engine or steam lammer)
circulates in the cylinder A, the temperature of the water flowing through the
pipes B will be quickly raised, and thus a great economy in the raising of
steam will be effected. When applying the heating apparatus to low-pressure
engines, instead of allowing the exhaust steam to escape and be lost I conduct
it from the cylinder A to any approved condenser, and thus utilize the water
thereby obtained. The water thus recovered may be returned to the boiler
for re-heating, or if on board ship used for culinary purposes. To ensure the
greatest possible economy I propose to pass the heated water from the
condenser through the heating cylinder A before admitting it to the boiler.
Having now set forth the nature of my Invention of "An Improved Mode
of: Heating Water for the Supply of Boilers and for other Purposes, and
explained the manner of carrying the same into effect, I wish it to be understood
that under the above in part recited Letters Patent I claim causing the exhaust
steam from the cylinders of steam engines and steam hammers to circulate
around tubular heating surfaces, through which water passes from a pump or
cistern to a boiler or other vessel for the purpose above set forth.
In witness whereof, I, the said Thomas Prideaux, have hereunto set my
hand and seal, the Eighteenth day of July, in the year of our Lord
One thousand eight hundred and sixty-six.
Witness,
THOMAS MAWER,
EDWARD WESTON.
(L.S.) THOMAS PRIDEAUX.