Ship's Pumps.
Year: 1886

page_text: Ship's Pumps.
I, EDWARD EVERDING of Eureka, County of Humboldt and State of California,
one of the United States of America, Book-keeper, 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 :-
My Invention relates to an Engine or attachment for operating pumps on vessels,
buoys, etc, where the rolling or pitching motion can be utilized for the purpose.
It consists of a cylinder having a piston working within it, and a piston-rod
which is connected with the handle of the ordinary ships pump. The cylinder has
a pipe extending from its lower end either directly through the bottom of the
vessel, or otherwise, so as to enter the water, so that the rising and falling of the
vessel in the water operates the piston and through it the pump. In connection
with this are valves and pipes, which will be more fully explained, by reference to
the accompanying drawings, in which ;-
The Figure is a side elevation of a vessel, with section showing the apparatus.
A is the ordinary ships pump, having a pipe B extending down into the hold
of the vessel in the usual manner, and the handle C, by which it is worked.
This handle has its end connected by a link or yoke D with the piston-rod E,
which extends upward from the piston F working within the cylinder G. H is a
guide, through which the piston-rod passes so as to preserve its axial line as it
moves up and down. I is a pipe extending out from the bottom of the cylinder,
which may pass directly through the bottom of the vessel, as shown, or it may
lead over the side and extend downward, or in other suitable way be carried down
so that its lower end is continually below the surface of the water.
The cylinder being open at the top, it will be manifest that as that portion of
the vessel where the pump and cylinder are situated, rises and falls by the rolling
or pitching of the vessel, the water in the pipe I will seek its level with that upon
the outside of the vessel.
The action will then be as follows:-
When that portion of the vessel rises, the water in the pipe will sink, and the
atmospheric pressure within the cylinder forces the piston downward. When that
portion of the vessel sinks or settles down into the water, the water will rise in
the pipe and thus force the piston with its rod and connected pump-handle up
again, and the movement is thus continued as the vessel rises and falls. If the

page_text: vessel rolls or pitches so heavily as to draw the piston down to the bottom of the
cylinder, the piston will pass below the mouth of the pipe J, which connects with
the side of the cylinder and also with the pipe I below the cylinder, and air will be
allowed to pass through the pipe J, and the check valve K, which is fixed in the
pipe, thus relieving the pressure on the piston by admitting air from above to
the pipe I below.
.
This will allow the water in pipe I, to fall as far as it will, and when the
vessel again begins to settle, the valve K will close and the water rising in the
pipe I, will force the piston to the upper end of the cylinder.
If it passes above the check-valve L, at the upper end of the cylinder, the air
below the piston will be allowed to escape through this valve, and thus relieve the
pressure upon the piston in its upward stroke.
When it is desired to stop the attachment, it can be done by simply opening a
valve at M, which allows air to pass freely into and out of the pipe I, as the water
rises and falls in the pipe.
It will be manifest that the length of stroke may be regulated by the position
of the check valve L, which may be placed lower down in the cylinder, if it is
desired to shorten the stroke.
The sizes of the cylinder and the pipe I, will depend upon the size of the pump,
depth of hold of the vessel, and the power required to operate the pump.
As the attachment is automatic in its operation, it may be employed upon vessels
or upon buoys, to keep them clear of water, and will need no attention.
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 :-
A cylinder fixed upon a floating vessel or buoy, and having a piston and piston
rod connected with the operating-lever of a pump, a pipe extending into the water
from the lower end of the cylinder, so that the piston may be operated by atmo-
spheric pressure, caused by the rise and fall of the water within the pipe, relief-
valves at the lower and upper ends of the cylinder, and a second pipe connecting 3
with the water-pipe below the cylinder, and provided with a relief-valve for the
admission of air to its upper end.
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