IMPROVEMENTS IN PROPELLING VESSELS WHEN SCREWS OR SUBMERGED PROPELLERS ARE USED
Year: 1856

page_text: LETTERS PATENT to William Hamond Bartholomew, of 15, Brunswick
Terrace, Leeds, for the Invention of "IMPROVEMENTS IN PROPELLING
VESSELS WHEN SCREWS OR SUBMERGED PROPELLERS ARE USED"
PROVISIONAL SPECIFICATION left by the said William Hamond Bar-
tholomew, at the Office of the Commissioners of Patents, with his
Petition, on the 14th February 1856.
I, WILLIAM HAMOND BARTHOLOMEW, of 15, Brunswick Terrace, Leeds, do
hereby declare the nature of the Invention for "IMPROVEMENTS IN PROPELLING
VESSELS WHEN SCREWS OR SUBMERGED PROPELLERS ARE USED," to be as follows:-
This Invention has for its object a peculiar combination or arrangement of
the steam machinery for giving motion to a screw or submerged propeller.
For this purpose two high-pressure steam cylinders are used, and they are
fixed on either side of the vessel, and incline at about right angles to each
other. The piston rods work through the lower covers of the steam cylinders,
and by means of connecting rods give motion to the crank shaft of the screw
or submerged propeller. The boiler, which is of a peculiar construction, is
placed and fixed to the vessel between the two steam cylinders, the propeller
shaft being below the boiler; by which combination, considerable convenience
and compactness of arrangement is obtained. The boiler is cylindrical, having
a horizontal cylindrical fire box surrounded by a cylindrical water space, at
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page_text: the back end of which fire box tubular flues pass to the smoke box, which
is at the other end of the boiler. The section of the boiler is larger through
the fire box than where the tubular flues pass through the other part of the
boiler, and the back and front ends of the boiler are stayed to each other by
suitable rods. The cylindrical fire box is strengthened by hoops or belts on
its outer surface. Over the fire box is a steam chest, and below the fire box
is a well to receive sediment. The hand lever or gearing is placed over the
boiler. The valves of the steam cylinders are governed by a link motion.
The valves used are piston valves, two to each cylinder. The exhaust is
between the two piston valves, the steam being admitted on the outer sur-
faces of the piston valves. The valves are each packed with an elastic metal
strap, having a tendency to expand in diameter, and, in order to prevent
steam passing (where the ends of a spring strap meet,) by notching one end,
and forming the other end of a strap with a projection suitable to enter and
fill the notch of the other end. The edges of these elastic straps are ground
to fit the covers or plates of the piston valves.
SPECIFICATION in pursuance of the conditions of the Letters l'atent, filed
by the said William Hamond Bartholomew in the Great Seal Patent
Office on the 9th August 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
HAMOND BARTHOLOMEW, of 15, Brunswick Terrace, Leeds, send grecting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourteenth day of February, in the year of our
Lord One thousand eight hundred and fifty-six, in the nineteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said William Hamond Bartholomew, Her special licence that I, the said
William Hamond Bartholomew, my executors, administrators, and assigns,
or such others as I, the said William Hamond Bartholomew, 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 PROPELLING VESSELS
WHEN SCREWS OR SUBMERGED PROPELLERS ARE USED," upon the condition (amongst
others) that I, the said William Hamond Bartholomew, my executors, or
administrators, by an instrument in writing under my, or their, or one of

page_text: their hands and seals, should particularly describe and ascertain the nature
of the said Invention, aud 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 William Hamond Bartholomew, 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 :-
This Invention has for its object a peculiar combination or arrangement of
the steam machinery for giving motion to a screw or submerged propeller.
For this purpose two high-pressure steam cylinders are used, and they are fixed
on either side of the vessel, and incline at about right angles to each other.
The piston rods work through the lower covers of the steam cylinders, and by
means of connecting rods, give motion to the crank shaft of the screw or sub-
merged propeller. The boiler, which is of a peculiar construction, is placed.
and fixed to the vessel between the two steam cylinders, the propeller shaft
being below the boiler; by which combination considerable convenience and
compactness of arrangement is obtained. The boiler is cylindrical, having a
horizontal cylindrical fire box surrounded by a cylindrical water space; at the
back end of which fire box tubular flues pass to the smoke box, which is at
the other end of the boiler. The section of the boiler is larger through the
fire box than where the tubular flues pass through the other part of the boiler,
and the back and front ends of the boiler are stayed to each other by suitable
rods. The cylindrical fire box is strengthened by loops or belts on its outer
surface. Over the fire box is a steam chest, and below the fire box is a well to..
receive sediment. The hand lever or gearing is placed over the boiler.
The valves of the steam cylinders are governed by a link motion. The valves
used are piston valves, two to each cylinder. The exhaust is between the two
piston valves, the steam being admitted on the outer surfaces of the piston
valves. The valves are each packed with an elastic metal strap having a
tendency to expand in diameter, and in order to prevent steam passing (where.
the ends of a spring strap meet,) by notching one end, and forming the other
end of a strap with a projection suitable to enter and fill the notch of
the other end. The edges of these elastic straps are ground to fit the covers
or plates of the piston valves.
Having thus stated the nature of my said Invention, I will proceed more
fully to describe the manner of performing the same.

page_text: Figures 1 and 2 of the Drawings annexed hereto, exhibit my Invention and
its application. For this purpose two high-pressure steam cylinders a and a
are used, and they are placed on either side of the vessel, and incline at about
right angles to each other. The piston rods band b work through the lower
covers c and c of the steam cylinders, and by means of connecting rods d and d,
give motion to the crank shaft e of the screw or submerged propeller. The
boiler, which is of a peculiar construction adapted for the use or employment
of high-pressure steam, is placed and fixed to the vessel between the two steam
cylinders a and a, the propeller shaft e being below the boiler; by which
combination considerable convenience and compactness of arrangement is
obtained. The boiler is cylindrical, having a horizontal cylindrical fire boxf,
surrounded by a cylindrical water and steam space, at the back end of which
fire box tubular flues g, g, pass to the smoke box h, which is at the other end
of the boiler. The section of the boiler is larger at the fire box than where
the tubular flues pass through the other part g, g, of the boiler or at the smoke
box ; the back and front ends of the boiler are stayed to each other by rods
or other suitable means. The cylindrical fire box fis strengthened by rings or
hoops or belts i around its outer surface, which receives its support therefrom by
the stay belts j. Upon the upper part of the boiler and over the fire box is a
steam chest k, and on the under side of the boiler beneath the fire box is a
well to receive sediment. The regulator and its handle m, the reversing or
hand lever or gearing n, is placed over the boiler in such a position as to be
both at the same time under control. The valves o of the steam cylinders
a and a are governed by a link motion worked by two excentrics. The valves
o used are piston valves, two to each cylinder. The exhaust is between the
two piston valves, the steam being admitted on the outer surface of the piston
valves, or it may be arranged vice versa. The valves are each packed with an
elastic metal strap, having a tendency to expand in diameter, and, in order to
prevent steam passing (where the ends of the spring strap meet,) by notching
one end, and forming the other end of the strap with a projection suitable to
enter and fill the notch of the other end. The edges of these elastic straps are
ground or faced to fit the covers or plates of the piston valves.
Having now described the nature of my Invention, and the manner in which
it is to be performed and carried into effect, I desire it to be understood that I
do not claim any of the parts of my Invention separately considered, such parts
being not entirely new, nor do I confine myself to the precise details which I
have had occasion to describe or referto, as many variations may be made there-

page_text: from without deviating from the principle or main features of my said Inven-
tion; but what I claim as my Invention is, the mode hercin-described of
combining the several parts.
In witness whereof, I the said William Hamond Bartholomew, have here-
unto set my hand and seal, this Twenty-fifth day of July, in the year
of our Lord One thousand eight hundred and fifty-six.
WILLIAM HAMOND BARTHOLOMEW. (L.S.)
Witness,
THO. FISHER,
Dock Street, Leeds.