Improvements in Scuppers especially applicable to Sponsons.
Year: 1898

page_text: COMPLETE SPECIFICATION.
Improvements in Scuppers especially applicable to Sponsons.
I, EDWIN JAMES PRESTON, of the Firm of J. Stone & Co., of Deptford, in the
County of Kent, Engineers, 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 :-
These scuppers are intended to be used in cabins water closets or closed rooms on
the sponsons, or in other parts of a ship where drains opening direct to the sea are
necessary for the purpose of checking the inrush of the sea or spray. The neck of
the scupper is fixed in a hole in the floor and an apertured lid is provided over it.
The neck is continued below into a cup or bell shaped wall within which is provided
a correspondingly formed inner wall an annular space between the two walls forming
a ready outlet while preventing an inrush of water from a striking sea, or wave
or spray.
Fig. 1 is a vertical section of the scupper applied to the floor, Fig. 2 a plan of the
lid, and Fig. 3 a plan of the scupper. The scupper is attached by a flange A with
bolts B fixed in a hole in the floor C the neck A¹ of the scupper entering the said
hole. The bolts B also fix the grated lid D thereto. The scupper terminates below
in a cup or bellshaped outer wall A2, and inner cup or bellshaped wall A³ and ribs A*
which unite the two in one casting. In case of a sea striking upwards it will mostly
or wholly spend its force against the inside of the wall A3 and not at all or not to any
great extent enter the annular space A5 between the rims of the walls A² and A³.
But any water that might enter at this place would mostly enter more on one side
than the other and then rising on that one side would pass down and out on the
other side. At the same time air is free to pass upwards through the grating. The
rim of the inner wall A³ is by preference turned up all round as shewn in order to
divert downwards any spray that may be forced upwards when the ship is going at
a high speed against the wind but it might be so formed as to present a more laterally
directed annular entry space between A² and A³.
Although the form shewn has been found suitable the invention is not confined
strictly thereto. As a matter of manufacture the scupper may be fixed by means of
one central bolt instead of by two or more bolts B or by providing the grate lid with
a screwed rim that screws on to or into the neck piece A¹. The inner wall A³ may
be cast in a separate piece instead of being cast in one with the rest as here shewn.
Instead of the grate openings in the lid D there may be provided a mushroom or
other valve, which is normally pendant and open but which would be forced upwards
and close if a sea of sufficient force could so act upon it.
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. A scupper adapted to be fixed in a sponson or other floor and consisting
accentially of a nook which ontown the Amy on nextured
mated
on
volved HJ

page_text: it, lower outer wall splayed downwardly from the neck and an inner cup or bellshaped
wall so arranged that an annular space and inlet are formed between the said outer
and inner wall substantially as and for the purpose set forth.
2. The construction of scupper described with reference to the accompanying
drawing.
Dated this Tanth day of Tab 1
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.