AN IMPROVEMENT OR IMPROVEMENTS IN APPARATUS FOR ECONOMISING STEAM AND FOR OTHER PURPOSES, AND THE APPLICATION THEREOP TO THE BOILERS OF STEAM ENGINES EMPLOYED ON BOARD PACKET BOATS AND OTHER VESSELS
Year: 1831

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, SAMUEL
SEAWARD, of the Canal Iron Works, in the Parish of All Saints, Poplar, in the
County of Middlesex, Engineer, send greeting.
WHEREAS His most Excellent Majesty King William the Fourth, did, by
His Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Fifteenth day of
January, in the first year of His reign, give and grant unto me, the said Samuel
Seaward, my exors, adiñors, and assigns, His especial licence, full power, sole
privilege and authority, that I, the said Samuel Seaward, my exors, admors,
and assigns, or such others as I, the said Samuel Seaward, my exors, adñiors,
and assigns, should at any time agree with, and no others, from time to time
and at all times, should and lawfully might make, use, exercise, and vend, within
that part of His Majesty's United Kingdom of Great Britain and Ireland called
England, His Dominion of Wales, and Town of Berwick upon Tweed, my Inven-
tion of "AN IMPROVEMENT OR IMPROVEMENTS IN APPARATUS FOR ECONOMISING STEAM
AND FOR OTHER PURPOSES, AND THE APPLICATION THEREOP TO THE BOILERS OF STEAM
ENGINES EMPLOYED ON BOARD PACKET BOATS AND OTHER VESSELS;" in which said
Letters Patent there is contained a proviso obliging me, tho said Samuel Sea-
ward, particularly to describe and ascertain the nature of my said Invention, and
in what manner the same is to he performed, and to cause the same to be en-
rolled in His Majesty's High Court of Chancery within six calendar months
next and immediately after the date of the said in part recited Letters Patent,
as in and by the same (reference being thereunto had) will more fully and at
large appear.

page_text: NOW KNOW YE, that in. compliance with the said proviso, I, the said
Samuel Seaward, do hereby declare that my improvement or improvements
in apparatus for economising steam and for other purposes are fully ascer-
tained and described as follows, reference being had to the Drawing hereunto
annexed:-
I construct a vessel, Z, of iron or other suitable material, and capable of with-
standing the heat of the steam contained in the boiler Y, and of resisting the
pressure of the atmosphere, and of a capacity equal to one-twentieth of the
water chamber of the boiler or thereabouts. This vessel I call a receiver, and
it is to be placed on the said boiler Y, as shown in the Drawing, or anywhere
near the boiler, of a sufficient height that any fluid contained in the said receiver
will-descend by its own gravity into the steam boiler Y: To this vessel I attach
four cocks or valves, and as many pipes, in the following order, viz*, one pipe A
from the top of the receiver Z to the steam chamber of the steam boiler, one
pipe B from the bottom of the said receiver Z to the water chamber of boiler,
one pipe C from the bottom of the said receiver to the water outside the ship,
and one pipe D. from the top of the said receiver to the well or lowest part of
the ship in which the boiler is placed, each of which cocks is supplied with a
cock or valve. The first operation of this apparatus for the effecting the saving
of fuel is as follows: when the steam is so high as to raise the safety valves and
escape, either in consequence of the engines standing still or the too great
quantity of fire, the cock A is to be opened and the receiver Z filled with
steam, the air rushing out by a small cock E, placed at the top. The receiver
being full, the cock A is to be shut, and also the cock E, and the cock C opened.
The steam contained in the said receiver will by this operation be condensed,
and a partial vacuum thereby formed; the water will then rush from outside
the ship and fill the receiver. The cock C being, then shut, and the cock B
opened, the water will descend slowly by its own gravity into the water chamber
of the boiler Y; and this can be accelerated by again opening the cock A, by
which means the water will descend at a heat not much below that of boiling
water. The saving of fuel will be evident, because at all times the boiler may
be completely filled, and the water itself raised to a high temperature by the
steam, which would otherwise escape at the safety valves and be completely lost.
The second operation is that of pumping or drawing the water from the hold
of the ship. To effect this, the cock A is again opened, and the receiver thereby.
filled with steam. Upon closing the cock A, the cock D is opened, and the
water will rush from the hold of the ship and fill the receiver. The cock D.
being shut and the cock C opened, the water contained in the receiver will
run overboard, by, opening the small air cock E in the top. This operation

page_text: can be repeated till the ship is perfectly dry. Fifty or sixty tons of water per
hour can be discharged with great facility in a boat of one hundred horses
power by simply employing the spare steam while the engines are at rest. If
on opening the cock B or the cock D, as described in the two foregoing opera-
tions, it is found that the steam contained in the receiver Z does not condense
with sufficient rapidity, the effect may be accelerated by throwing in a small jet
of water, by means of a force pump or otherwise.
Now, having described my improved apparatus, I do hereby declare that I
claim the same when applied to the boilers of steam engines employed on board
packets boats, and other vessels, for economising steam, and for the other pur-
poses herein-before mentioned, but not when employed for any other purpose.
In witness whereof, I, the said Samuel Seaward, have hereunto set my
hand and seal, this Thirteenth day of July, 1831.
SAMUEL (L.B.)
AND BE IT REMEMBERED, that on the Thirteenth day of July, in the
year of our Lord 1831, the aforesaid Samuel Seaward came before our said
Lord the King in His Chancery, and acknowledged the Specification aforesaid,
and all and every thing therein contained and specified, in form above written.
And also the Specification aforesaid was stamped according to the tenor of
the Statute made for that purpose.
Inrolled the Thirteenth day of July, in the year of our Lord One thou-
sand eight hundred and thirty-one.