Improvements in the Construction of Navigable Vessels.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Construction of Navigable Vessels.
I, HENRY FREDERICK SWAN, of North Jesmond, Newcastle on Tyne, in the
County of Northumberland, Shipbuilder, do hereby declare the nature of my
said invention to be as follows:-
The object of my invention is to effect improvements in the construction of
navigable vessels, so as to provide for the carriage of liquid cargoes, ordinary
cargoes and cargoes of exceptional weight, such as ores etc., in one and the same
vessel.
I construct vessels of the usual shipbuilding materials and sub-divide them by
means of longitudinal and transverse bulkheads into numerous compartments,
each of which may or may not be watertight.
In most cases there would be two longitudinal bulkheads which would extend
above the main deck of the vessel, so as to form a trunk to provide capacity for
the expansion of the liquid cargoes as provided in my Patents Nos. 140808 157118
or the vessel may be constructed with a flush deck and expansion be provided for
according to my Patent No. 48989.
The series of compartments within these longitudinal bulkheads is specially
arranged for the carriage of exceptionally heavy cargoes such as ores and
facilitating the cleaning of the compartments by making the internal surfaces
free from obstruction.
1000
GEORGE DOWNING & SONS,
8, Quality Court, London, W.C., Agents.
Improvements in the Construction of Navigable Vessels.
I, HENRY FREDERICK SWAN, of North Jesmond, Newcastle-upon-Tyne, in the
County of Northumberland, do hereby declare the nature of my said invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The objects of my invention are, first, to construct new vessels propelled by steam,
sails or any other means, or to alter existing navigable vessels so that they may
be capable of carrying liquid cargoes in bulk; and, secondly, that they shall at
the same time be of such a construction as shall enable them to carry dry or
other cargoes of exceptional weight, such as mineral ores, without unduly straining
the structure or increasing the metacentric height to an excessive extent.

page_text: In carrying out my invention I construct vessels of the usual shipbuilding
materials, and sub-divide them by means of longitudinal and transverse bulk-
heads into compartments of convenient size.
In most cases there would be two longitudinal bulkheads extending the full
Jength of that part of the vessel, which is intended for the reception of liquid
or other cargoes. These bulkheads are not carried down to the bottom of the
ship as usual, but are connected to a flat which is arranged at a convenient height
above the bottom of the ship.
Suitable valves may or may not be arranged to allow of the liquid cargoes.
passing from the central to the wing compartments in each tank should it be
necessary to move them.
The two or more longitudinal bulkheads are carried up above the deck of the
vessel in some cases, to provide for the expansion, due to increase of temperature,
in the liquid cargo.
When it is not convenient to carry the longitudinal bulkheads to such a height
as is necessary to provide sufficient space for both the aforesaid objects, I con-
struct expansion tanks in the manner set forth in my Patents Nos 1408083 and
157118, or the vessel may be constructed with a flush deck and expansion tanks
arranged as described in my Patent No. 48984.
In carrying heavy cargoes the space between the longitudinal bulkheads only
is used, and the wing compartments are left empty. This raises the centre of
gravity of the cargo considerably, and the spaces are so proportioned that the
metacentric height shall not be excessive in any condition of loading.
And in order that my said invention may be particularly described and ascer
tained, reference is hereby made to the accompanying drawings, in which similar
letters of reference indicate corresponding parts.
Fig. 1 is a longitudinal sectional elevation and Fig. 2 a transverse section of
a navigable vessel, showing one method of carrying out my invention.
Fig. 3 is a longitudinal sectional elevation and Fig. 4 a transverse section
showing the application of my invention to a vessel with a flush deck.
aa are the central cargo spaces, enclosed by the longitudinal bulkheads bb,
the transverse bulkheads cc, and the raised floor or flat d. ce are the wing
spaces, which are also divided by transverse bulkheads which may or may not
correspond with those dividing the central cargo spaces a a.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
In the construction of navigable vessels for the purposes aforesaid, the combina-
tion and arrangement of bulkheads and subdivisions, substantially as described
and illustrated by the drawings.
GEORGE DOWNING & SONS,
8, Quality Court, London, W.C.,
Agents for the Applicant.