IMPROVEMENTS IN MARINE ENGINES
Year: 1863

page_text: LETTERS PATENT to Charles Arthur Day, Andrew Lamb, and Thomas
Summers. Engineers, in the Town and County of Southampton, for tho
Invention of "IMPROVEMENTS IN MARINE ENGINES."
Sealed the 2nd November 1868, and dated the 7th May 1863.
PROVISIONAL SPECIFICATION left by the said Charles Arthur Day,
Andrew Lamb, and Thomas Summers at the Office of the Commissioners
of Patents, with their Petition, on the 7th May 1863.
We, CHARLES ARTHUR DAY, ANDREW LAMB, and THOMAS SUMMERS,
Engineers, in the Town and County of Southampton, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN MARINE ENGINES,"
be as follows:—
Our Invention consists in the employment of the ordinary suction air pumps
of marine steam engines for the purposes of surface condensation, whereby we
avoid the employment of additional pumps. The accompanying Drawing shows
one manner in which our Invention may be carried into effect.
We apply the two ordinary suction air pumps A, A, to the surfaco

page_text: condensers B, B. The air pump A' draws from the condensers B, B, the con-
densed or fresh water for the supply of the boiler, and the other air pump A
draws from them the sea water or condensing water, which it discharges
overboard by the pipes C, C.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Arthur Day, Andrew Lamb, and Thomas Summers
in the Great Seal Patent Office on the 7th November 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, CHARLES
ARTHUR DAY, ANDREW LAMB, and THOMAS SUMMERS, Engineers, in the
Town and County of Southampton, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventh day of May, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-sixth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
us, the said Charles Arthur Day, Andrew Lamb, and Thomas Summers, Her
special licence that we, the said Charles Arthur Day, Andrew Lamb, and
Thomas Summers, our executors, administrators, and assigns, or such others
as we, the said Charles Arthur Day, Andrew Lamb, and Thomas Summers,
our 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 MARINE
ENGINES," upon the condition (amongst others) that we, the said Charles
Arthur Day, Andrew Lamb, and Thomas Summers, or one of us, our exe-
cutors or administrators, by an instrument in writing under our, or one of
our, or their, or one of their hands and seals, should particularly describo 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 Offico within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that we, the said Charles Arthur Day, Andrew Lamb,
and Thomas Summers, do hereby declare the nature of our said Invention,
and in what manner the same is to bo performed, to be particularly described

page_text: and ascertained in and by the following statement thereof, reference being
had to the Drawings hereunto annexed, that is to say :-
Our Invention consists in the employment of the ordinary suction air pumps
of steam engines either for screw or paddle steam vessels for the purposes of
surface condensation in manner hereafter stated.
We apply the two ordinary suction air pumps of steam engines to surface
condensers in such manner that one pum draws from them the condensed
or fresh water for the supply of the boil, and that the other pump draws
from them the sea water or condensin water, which it discharges over-
board.
The accompanying Drawings shew our Invention applied to a pair of
paddle wheel engines with oscillating cylinders.
Figure 1 is a transverse section of the engines through the centre line of the
air pumps; Figure 2 is an end elevation of the engines; Figure 8 is a plan of
the engines, one half in horizontal section on the line A, B, of Figure 2 through
the air pumps and bed plate, and the other half on the line B, C, Figure 2.
The same letters refer to similar parts in all the Figures.
A, A, are the cylinders; B, B, represent the surface condensers which stand
on the engine bed plate and discharge the fresh or condensed water by the
passages C, C, into the ordinary suction air pump D, which lifts this fresh or
condensed water into its hot well, from whence it is forced by feed pumps into
the boiler, or it may be forced by the air pump itself into the boiler without
any additional feed pump; E, E, are pipes for the discharge of water and air
overboard from the air pump D, which can be used in case of leakage from the
surface condenser tubes, or if sea water be purposely admitted for injection;
F is the other ordinary air pump of steam engines which pumps sea water
through the ship's sides by the pipe G, and this sea water, after circulating
amongst the tubes of the surface condensers, passes through the pipes, H, H,
into the air pump F, which discharges it overboard through the pipes J, J;
K, K, are valves for regulating the flow of the sea water through the surface
condensers B, B; L, L, are valves or cocks fitted to the surface condensers
for admitting sea water as injection water for condensing the steam in case
the tubes of the surface condensers become defective, or to make up the
loss of feed water in the boilers.
And having now described the nature of our said Invention, and in what
manner the same is to be performed, we declare that wo claim the employ-
ment in marine engines fitted with surface condensers of one of the air pumps
to draw the condensed water from the surface condensers to supply the builers,

page_text: and of the other to draw the sea or condensing water through the same, in
manner herein-before described.
In witness whereof, we, the said Charles Arthur Day, Andrew Lamb,
and Thomas Summers, have hereunto set our bands and seals, this
Fifth day of November, One thousand eight hundred and sixty-
three.
CHARLES ARTHUR DAY. (L.S.)
ANDREW LAMB.
THOMAS SUMMERS.
(L.S.)
(L.B.)