Improvements in or relating to Ships and Vessels.
Year: 1892

page_text: Date of Application, 19th Dec., 1892
Complete Specification Left, 26th Aug., 1893-Accepted, 30th Sept., 1993
PROVISIONAL SPECIFICATION.
Improvements in or relating to Ships and Vessels.
I, JOHN NEWTON MAPPIN, of 2 Queen Victoria Street in the City of London,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
In order to prevent ships and vessels from sinking they have often been made
with cellular bottoms but when this is done the shock of a collision is apt to so
strain the structure as to cause many of the cells to leak.
According to this invention in place of making the cells an integral part of the
structure they are made separate in the form of boxes which are attached in
suitable places inside the ship, lugs or flanges being provided on the outside for
this purpose.
This method has the advantage of allowing each cell to be
independently tested before being put into place and if afterwards in the course
of time any cell becomes leaky it can readily be removed and replaced by a
sound one.
Dated this 17th day of December 1892.
COMPLETE SPECIFICATION.
Improvements in or relating to Ships and Vessels.
I, JOHN NEWTON MAPPIN, of 2 Queen Victoria Street in the City of London,
Manufacturer, 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 :-
In order to prevent ships and vessels from sinking they have often been made
with cellular bottoms but when this is done the shock of a collision is apt to so
strain the structure as to cause many of the cells to leak.
According to this invention in place of making the cells an integral part of the
structure they are made separate in the form of boxes which are attached in suitable
places inside the ship, lugs or flanges being provided on the outside for this purpose.
This method has the advantages of allowing each cell to be independently tested
before being put into place and if afterwards in the course of time any cell becomes
leaky it can readily be removed and replaced by a sound one.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a longitudinal section of a ship fitted according to this invention.
Figure 2 is a part transverse section to a larger scale of the same and
Figure 3 is a perspective view to a still larger scale of part of one of the boxes.
In the drawings each box is made of four plates, the first a forming the top and
two sides, the second the bottom, and the others c the two ends but other
constructions may be employed. The boxes are provided with flanges as shown
which are secured to the ribs d and decks e of the ship by bolts f. 9 9 are filling

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. Detachable air tight boxes or cells secured to the inside of a ship or vessel
substantially as described.
2. My improvements in or relating to ships or vessels substantially as described
and shown in the drawings.
Dated this 14th day of August 1893.
J. NEWTON MAPPIN.