IMPROVE- MENTS IN TWIN SHIPS
Year: 1876

page_text: LETTERS PATENT to Angelo James Sedley, of Sedley Place, Oxford Street,
in the County of Middlesex, Civil Engineer, for the Invention of " IMPROVE-
MENTS IN TWIN SHIPS."
Sealed the 30th June 1876, and dated the 19th January 1876.
PROVISIONAL SPECIFICATION left by the said Angelo James Sedley at the
Office of the Commissioners of Patents on the 19th January 1876.
ANGELO JAMES SEDLEY, of Sedley Place, Oxford Street, in the County of Mid-
dlesex, Civil Engineer. "IMPROVEMENTS IN TWIN SHIPS."
This Invention has for its object to enable twin ships to be propelled at greater
speed than heretofore, and to improve the arrangements for steering such ships.
To enable twin ships to be propelled at greater speed than heretofore, the after
part of each hull commencing amidships, or preferably at about 3/4ths. or more from
the stem, is tapered both on the outside and inside, and the floor from this distance
to the so-called stern is curved upwards to allow a free passage for the water to flow
away from the paddle wheels without friction.
The paddle wheels work in the central channel at or in rear of the part where
the floor of the hulls commences to taper upwards.
The sectional arca of each hull at 3/4ths or thereabouts from the stem, has a
slightly larger immersed sectional area to provide for the upward taper of the floor
of the stern.
The position of the main shaft of the paddle wheels being, as above stated, some-
what abaft the cross sectional line where the taper or upward curve of the floors of
the hulls commences, the engines will be abaft the centre of the vessel, and it will
be necessary to place the boilers suitably forward in the hulls.
This arrange-
ment will leave the whole of the midship section of boat available for cargo or
passengers.
For the purpose of steering twin vessels in place of providing the hulls with
rudders at their ends, a rudder is employed which acts centrally in the channel
between the hulls, either near the bow or at other suitable position before or abaft
the paddle wheels. This rudder is made free to turn round, so that the boat can be
propelled forwards or backwards as may be desired without any trouble. The blade
is also mounted upon a pin joint, so that it may be raised or lowered as required,
and either be allowed to project below the bottom of the boat or be raised above the
water level.

page_text: An additional rudder is also provided in a casing on the upper deck over the
central channel. Ordinarily, this additional rudder is out of action, but in case of
accident arising to the other rudder it may be lowered down into the central
channel and thus be at once brought into action.
.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Angelo James Sedley in the Great Seal Patent Office on the 19th
July 1876.
ANGELO JAMES SEDLEY, of Sedley Place, Oxford Street, in the County of Mid-
dlesex, Civil Engineer. "IMPROVEMENTS IN TWIN SHIPS."
This Invention has for its object to enable twin ships to be propelled at greater
speed than heretofore, and to improve the arrangements for steering such ships.
To enable twin ships to be propelled at greater speed than heretofore, the after
part of each hull commencing amidships, or preferably at about 3/4ths or more
from the stem is tapered, both on the outside and inside, and the floor from this
distance to the so-called stern is curved upwards to allow a free passage for the
water to flow away from the paddle wheels without friction.
The paddle wheels work in the central channel at or in rear of the part where
the floor of the hulls commences to taper upwards.
The sectional area of each hull at 3/4ths or thereabouts from the stem, has a
slightly larger immersed sectional area to provide for the upward taper of the floor
of the stern.
The position of the main shaft of the paddle wheels being, as above stated, some-
what abaft the cross sectional line where the taper or upward curve of the Hoors of
the hulls commences, the engines will be abaft the centre of the vessel, and it will
be necessary to place the boilers suitably forward in the hulls. This arrange-
ment will leave the whole of the midship section of boat available for cargo or
passengers.
For the purpose of steering twin vessels in place of providing the hulls with
rudders at their ends, a rudder is employed, which acts by preference centrally in
the channel between the hulls, either near the bow or at other suitable position
before or abaft the paddle wheels. This rudder is made free to turn round, so that
the boat can be propelled forwards or backwards as may be desired, without any
trouble. The blade is also mounted preferably upon a pin joint, so that it may be
raised or lowered as required, and either be allowed to project below the bottom of
the boat or be raised above the water level.
An additional rudder is also provided in a casing under or on the upper deck
over the central channel. Ordinarily this additional rudder is out of action, but in
case of accident arising to the other rudder it may be lowered down by suitable
means into the central channel, and thus be at once brought into action.
In order that my said Invention may be most fully understood and readily
carrried into effect, I annex a Drawing of a twin ship constructed in accordance
therewith.
DESCRIPTION OF THE DRAWING.
Figure 1 is a longitudinal section taken on the centre line.
יד
1

page_text: Yaam is,
The construction of twin ships, substantially as shown and described.
I also claim the arrangement of the rudders of twin ships, substantially as
described.
In witness whereof, I, the said Angelo James Sedley, have hereunto set my
hand and seal, this Nineteenth day of July, in the year of our Lord One
thousand eight hundred and seventy-six.
ANGELO JAMES SEDLEY. (L.S.)