TRUVIDIONAL DE MOITIUATION
Year: 1896

page_text: ۵۰
Date of Application, 29th July, 1856
1007
Date of Application, 29th July, 1856
Complete Specification Left, 28th Apr., 1897 Accepted, 5th June 1987
TRUVIDIONAL DE MOITIUATION
Improvements in Ships' Water-tight Doors.
We, WALTER HENRY WILSON and WILLIAM JAMES PIRRIE both of The Ship-
building and Engineering Works, Belfast, in the County of Antrim, Ireland, do
hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide a water-tight door for ships' bulkheads,
through which men can pass and cargo, coal, or other material can be wheeled in
barrows or trucks, or conveyed in other receptacles, without at any time leaving an
opening in said bulkhead which would allow water to flow in sufficient quantity to
endanger the safety of the vessel.
To effect this object, we form the doors with a lock or chamber, which, when
opened on one side of the bulkhead is always closed on the other. For this purpose
we make the doors of metallic plates, stamped, dished, or otherwise set to such a forin
as will give the greatest stiffness to resist lateral pressure. In the single form of
door for men to pass through, the door plate is set to a semi-circular shape, and
hinged or pivotted on a vertical bar placed at the convex side of the plate. The lock
or chamber is formed by fixing a plate vertically at the opposite side of the door to
the hinge, and having its face set to radius equal to about one half the breadth of the
door, and sufficiently clear of the same to allow the door to work freely. The top
and bottom of the lock is formed of flat plates fixed to the bulkhead and to the
circular shaped plate just described. The edge of the door or bulkhead plate is
provided with india-rubber packing secured in place by metallic strips fastened
with screws, and a face or surface is formed on the plating of the chamber or lock
against which this india-rubber bears, thus forming a water-tight joint.
In
The action of the door is as follows:-A man wishing to pass through the
bulkhead enters the lock or chamber, pushes the door before him, thereby closing the
opening through which he has just entered, and forming an opening on the opposite
side of the bulkhead, from which he emerges. The space between the lock and the
edge of the door we make as small as possible, but sufficient to allow clearance for
the door to work easily. In some cases we prolong the spindle of the hinge or pivot
either above or below the lock and fit same with an arm carrying a weight sufficient
to balance the door and prevent slamming about with the motion of the vessel.
doors through which coal or cargo is to be wheeled in barrows, trucks, or other
receptacles, we form the lock of sufficient length to take such barrows or receptacles,
and make two doors; one at each end of the lock. The chamber in which each door
works is arranged similarly to that described for the single doór, and these chambers
are placed a few feet apart, being joined together by a short tunnel, thus forming a
lock of sufficient length to take the man and barrow or other receptacle. The doors
are hinged upon the one side in each case, and connected together with a connecting
bar or rod, which compels the one door to close whilst the other is being opened.
Similar balance weights to those just described may be also provided, and may be
fitted on one or both doors; but as the doors are connected together, one balance
weight if made of sufficient size will answer the purpose.
CT 1
1000
WALTER H. WILSON.
W. J. PIRRIE.

page_text: Improvements in Ships' Water-tight Doors.
We, WALTER HENRY WILSON, and WILLIAM JAMES PIRRIE, both of The Ship-
building and Engineering Works, Belfast, in the County of Antrim, Ireland, 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.
The object of this invention is to provide a water-tight door for ships' bulkheads,
through which men can pass, and cargo, coal or other material can be wheeled in
barrows or trucks, or conveyed in other receptacles, without at any time leaving an
opening in said bulkhead which would allow water to flow in sufficient quantity to
endanger the safety of the vessel.
To effect this object, we form the doors with a lock or chamber, which, when
opened on one side of the bulkhead is always closed on the other.
For this purpose
we make the doors of metallic plates, stamped, dished, or otherwise set to such a form
as will give the greatest stiffness to resist lateral pressure.
Figure 1 is a vertical section of the single form of door for men to pass through.
The upper part is taken on the line 1-1 Figure 2 and the lower part on the
line 11. Figure 2 is a horizontal section on the line 2-2 Figure 1. The
door plate a is set to a semi-circular shape, and hinged or pivotted on a vertical bar b
placed at the concave side of the plate. The lock or chamber is formed by fixing a
plate e vertically at the opposite side of the door to the hinge, and having its face set
to radius equal to about the breadth of one half the door, and sufficiently clear of the
same to allow the door to work freely. The top and bottom of the lock is formed of
flat plates d fixed to the bulkhead e and to the circular shaped plate c. The edge of
the door or bulkhead plate is provided with india-rubber packing a secured in place
by metallic strips a fastened with screws, and a face or surface is formed on the
plating of the chamber or lock against which this india-rubber bears, thus forming a
watertight joint as shown to a larger scale at Figure 3. The back of the door carries
a semi-circular plate a working in contact with strips el of indiarubber fixed to the
bulkhead. a a are handles fixed to the door.
The action of the door is as follows:-A man wishing to pass through the bulkhead
enters the lock or chamber, pushes the door before him, thereby closing the opening
through which he has just entered, and forming an opening on the opposite side of
the bulkhead, from which he emerges. The space between the lock and the edge of
the door we make as small as possible, but sufficient to allow clearance for the door to
work easily.
In some cases we prolong the spindle b of the hinge or pivot either above or below
the lock and fit same with an arm & carrying a weight sufficient to balance the
door and prevent slamming about with the motion of the vessel..
In doors through which coal or cargo is to be wheeled in barrows, trucks, or other
receptacles, we form the lock of sufficient length to take such barrows or receptacles,
and make two doors, one at each end of the lock. This arrangement is shown at
Figures 4 and 5, Figure 4 being a vertical section on the lines 4-4 and 4x-4x
Figure 5 and Figure 5 a horizontal section on the line 5-5 Figure 4. The chamber
in which each door a works is arranged similarly to that described for the single door,
and these chambers are placed a few feet apart, being joined together by
tunnel, thus forming a lock of sufficient length to take the man and barrow or other
receptacle. The doors a are hinged upon the one side in each case, and their tops are
connected together with a connecting bar or rod f (see Figure 5) which compels the
one door to close whilst the other is being opened. Similar balance weights b² to
those just described may be also provided, and may be fitted on one or both doors;
short

page_text: but as the doors are connected together, one balance weight, if made of sufficient
size will answer the purpose.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The combination of the door a and plate e substantially as described with
reference to Figures 1 and 2.
2. The combination of the doors a and plates c c substantially as described with
reference to Figures 4 and 5.
3. Water tight doors substantially as described and shown in the drawings.
Dated this 13th day of April 1897
WALTER H: WILSON.
W. J. PIRRIE.