Improvements in or relating to Watertight Doors.
Year: 1899

page_text: Date of Application, 31st Oct., 1889
Complete Specification Left, 31st Aug., 1900-Accepted, 31st Oct., 1900
PROVISIONAL SPECIFICATION.
Improvements in or relating to Watertight Doors.
We, PETER PHORSON and JAMES MARE, both Shipbuilders, of the North Sands
Shipbuilding Yard, Sunderland, in the County of Durham, do hereby declare
the nature of this invention to be as follows..
Our invention relates to watertight doors, especially ships' watertight doors.
By the usual practice, it is very difficult and expensive to obtain absolute
tightness, and even when tightness 18 obtained, it is often only temporary
It 18 with the object of obviating the existing difficulties in obtaining pei-
manent tightness that we have devised our invention, which consists in providing,
as an auxiliary to the ordinary door, a door arranged to shut watertightly upon
a face furnished within the tank or compartment to be closed
According to a convenient way of carrying our improvements into effect, suit-
able for a ship's deep hold tauk, we fix to the inside of the tank or compartment-
that is to say, at the side of the wall or bulkhead remote from the side where
the customary door 18 aanged--and about the opening therein, a frame of zed,
angle or other suitable cross section.
On the inner end oi side of this frame, we apply, in any appropriate manner,
a rubber or other equivalent packing to form a closing tace for a door which
18 made of sufficient size to close the opening in the tank or compartment, and
of ample strength to withstand the pressure of the fluid contamed; thus this
door serves as an auxiliary to the ordinary door
The auxiliary door may be hinged to the frame, or it may be entirely detached,
depending on requirements, but in any case, when closed, it is retained in position
by suitable fastening devices, such as buttons pivoted on the door to engage and
disengage the margin of the frame, or screws disposed to force the door and
closing face into tight contact
In this way it will be seen that the necessity for making the ordinary door
tight is entirely avoided, the auxiliary door giving, in a simple and cheap manner,
the requisite tightness
Of course, it will be understood that the door need only be shut when water
ballast or liquid cargo is being carried in the tank or compartment
Though we have exemplified our invention in reference to one particular
application, yet we wish it understood it is applicable to others, as will be
obvious, the mode of adaptation always being substantially the same as that
described.
Dad h. 20tL
1000

page_text: Improvements in or relating to Watertight Doors.
We, PETER PHOBSON and JAMES MARK, both Shipbuilders, of the North Sands
Shipbuilding Yard, Sunderland, in the County of Durham, do hereby declare
the nature of this invention and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement.-
Our invention relates to watertight doors, especially ships' watertight doors
By the usual practice, it is very difficult and expensive to obtain absolute
tightness, and even when tightness is obtained, it is often only temporary
It is with the object of obviating the existing difficulties in obtaining per-
manent tightness that we have devised our invention, which consists in providing,
as an auxiliary to the ordinary door, a door arranged to shut watertightly upon
a face furnished within the tank or compartment to be closed.
We will now describe our invention in reference to the accompanying drawings
which show a convenient way of carrying our improvements into effect suitable
for a ships' deep hold tank, and of which Fig 1 is a central vertical_section,
Fig 218 an elevation and Fig 3 a horizontal section on the line - in Fig 2
According to the invention, we fix to the inside of the tank or compartment-
that is to say, at the side of the wall or bulkhead A remote from the aide where
the customary doo1 B is arranged for use as usual-and about the opening therein,
a frame C of zed, angle or other suitable cross-section The frame C 18 illustrated
as of zed section
On the inner end or side c of this frame C, we apply, in any appropriate manner,
a rubber or other equivalent packing D to form a closing face for a door E which
18 made of sufficient size to close the opening in the tank or compartment, and of
ample strength to withstand the pressure of the fluid contained; thus this door E
serves as an auxiliary to the ordinary door B
The auxiliary door E may be hinged to the frame C as illustrated, e, e indicating
the hinges, or, it may be entirely detached, depending on requirements; but in
any case, when closed, it is retained in position by suitable fastening devices,
such as buttons F pivoted at f on the door to engage and disengage the margin
of the frame C at or screws disposed to force the door E and closing face into
tight contact
In this way it will be seen that the necessity for making the ordinary door B
tight is entirely avoided, the auxiliary door E giving, in a simple and cheap
manner, the requisite tightness.
Of course, it will be understood that the door E need only be shut when water
ballast or liquid cargo 18 being carried in the tank or compartment.
Though, we have exemplified our invention in reference to one particular
application, yet, we wish it understood it is applicable to others, as will be
obvious, the mode of adaptation always being substantially the same as that
described
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that
what we claim is:-
1. The improvemente in or relating to watertight doors consisting in pro-
viding, as an auxiliary to the ordinary door, a door arranged to shut water-
tightly upon a face furnished within the tank or compartment to be closed,
substantially as described
2. In watertight doors, the combination with the ordinary door, of an auxiliary

page_text: door, a frame fixed to the wall or bulkhead on the side remote from the side
where the ordinary door is arranged and about the opening therein forming a
face upon which the auxiliary door 18 arranged to shut watertightly, and fastening
devices for retaining the auxiliary door in position when closed, substantially
as described
3. The combination of parts constituting the improvements in or relating to
watertight doors arranged and adapted for use substantially as described with
reference to the drawing
Dated this 30th day of August 1900.
For the Applicants,
J. A HARVEY,
Chartered Patent Agent,
3, St Nicholas' Buildings, Newcastle-on-Tyne