IMPROVEMENTS IN AND CONNECTED WITH PITMDS
Year: 1877

page_text: LETTERS PATENT to Edwin Paul, of Liverpool, in the County of Lancaster,
Consulting Engineer, for the Invention of "IMPROVEMENTS IN AND CONNECTED
WITH PITMDS
"
Sealed the 9th November 1877, and dated the 22nd June 1877.
PROVISIONAL SPECIFICATION left by the said Edwin Paul at the Office of
the Commissioners of Patents on the 22nd June 1877.
EDWIN PAUL, of Liverpool, in the County of Lancaster, Consulting Engineer.
"IMPROVEMENTS IN AND CONNECTED WITH PUMPS."
This Invention relates,-
First. To pumps for use more especially on ships or vessels employed for salvage
purposes.
In
And, Second. To pumps which are required to have an intermittent motion.
Under the first part of the Invention the object is to provide a pump capable of
being used either for raising or forcing water or liquids or for compressing aeriform
fluids, thereby obviating the necessity of having and using two separate pumps.
carrying this part of my Invention into effect, I construct the cover or covers of the
pump cylinder or barrel so that it or they can be caused to slide within the said pump
cylinder or barrel. Any convenient means may be used for moving the said cover
or covers, and for retaining it or them in position. When the said cover or covers
is or are at or near the end or ends of the cylinder or barrel, the pump operates for
raising and forcing liquids through valves of the ordinary construction, but when
the cover or covers is or are moved some distance into the cylinder or barrel, so as
to bring the said cover or covers close to the piston or plunger at each end of its
The valves in this case are
stroke, the pump acts for compressing aeriform fluids.
placed in the cover or covers, and are of similar construction to those ordinarily
used in appliances for compressing aeriform fluids.
Under the second part of my. Invention the object is so to construct the operating
parts of a pump, say, a feed pump, that although the motion of the pump rod is
constant, the pump can be thrown into or out of work at pleasure. For this purpose

page_text: I attach the pump piston or plunger to a sleeve placed around the pump rod, and
provide a screw and nut, or the like, whereby the said sleeve and the pump rod can
be rigidly connected together, so as, when desired, to partake of the same motion as
the pump rod.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Edwin Paul in the Great Seal Patent Office on the 22nd December
1877.
EDWIN PAUL, of Liverpool, in the County of Lancaster, Consulting Engineer.
"IMPROVEMENTS IN AND CONNECTED WITH PUMPS."
This Invention relates,-
First. To pumps for use more especially on ships or vessels employed for salvage
purposes.
'
And, Second. To pumps which are required to have an intermittent motion.
Under the first part of the Invention the object is to provide a pump capable of
being used either for raising or forcing water or liquids or for compressing aeriform
fluids, thereby obviating the necessity of having and using two separate pumps.
In carrying this part of my Invention into effect, I construct the cover or covers of
the pump cylinder or barrel so that it or they can be caused to slide within the
said pump cylinder or barrel. Any convenient means may be used for moving the
said cover or covers, and for retaining it or them in position. When the said cover
or covers is or are at or near the end or ends of the cylinder or barrel, the pump
operates for raising and forcing liquids through valves of the ordinary construction,
but when the cover or covers is or are moved some distance into the cylinder or
barrel, so as to bring the said cover or covers close to the piston or plunger at each
end of its stroke, the pump acts for compressing aeriform fluids. The valves in this
case are placed in the cover or covers, and are of similar construction to those
ordinarily used in appliances for compressing aeriform fluids.
Under the second part of my Invention the object is to so construct the operating
parts of a pump, say, a feed pump, that although the motion of the pump rod is
constant, the pump can be thrown into or out of work at pleasure. For this purpose
I attach the pump piston or plunger to a sleeve placed around the pump rod, and
provide a screw and nut, or the like, whereby the said sleeve and the pump rod can
be rigidly connected together, so as, when desired, to partake of the same motion as
the pump rod.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a sectional elevation illustrative of a pump constructed under the first
part of my Invention.
1 is the pump cylinder or barrel; 2, piston operated by any convenient power
through the rod 3; 4, 4¹, covers free to slide to and fro in the said cylinder or barrel,
and capable of being retained in any desired position by the screws and nuts 5, 5!,
although other means may be used; 6, 61, are ports leading to the water or liquid
suction and delivery valves; 7 are aeriform fluid suction valves; 8 are aeriform fluid
delivery valves, through which aeriform fluid is delivered to the pipes 10, 10¹, 11.

page_text: The operation of the pump, which, with the covers in the position shown, is
adapted for pumping aeriform fluid, is as follows:-When the piston is moving in
the direction shown by the arrow, air is drawn in to fill the cylinder or barrel
through the valves 7 in the cover 4, whilst on the reverse stroke the said air is
expelled through the valves 8 into the pipes 10, 11. The other cover 4¹ is also
provided with suction and delivery valves, and the action is similar to that above
described.
When the covers 4, 41, are moved so as to rest against and make joint with the
shoulders 12, and the air suction and delivery valves are screwed down by the
nuts 13, or otherwise secured to their seats, the pump is ready for pumping water
and other liquids through the ports 6, 61, and the construction and arrangement of
the valves and passages is of any desired kind used in liquid pumps.
The pipes 10, 10', from the covers are arranged to work or slide in and out of the
pipe 11 through stuffing boxes 14, so that it is not necessary to disconnect the air
delivery passages when moving the covers.
It will be evident that in a single-acting pump only one cover will require to be
moved.
Fig. 2 is a sectional view of apparatus illustrative of the second part of my
Invention. Here 20 is a rod having a reciprocating motion communicated to it,
say, from the moving parts of a pumping engine; 21 is a sleeve fitting around the
said rod 20, and having secured thereto the piston 22. One end of the sleeve is
fitted with the screwed cap and hand wheel 23. When it is desired that the
piston 22 should work, the rod 20 and sleeve 21 are rigidly connected together by
screwing the cap 23 on to the rod 20, as shown. The motion of the rod 20 is then
communicated to the sleeve 21 and piston 22.
When it is desired to arrest the motion of the piston 22 the cap 23 is disconnected
from the rod 21. The set screw 24 working in the recess 25 keeps the cap 23 in
its place when disconnected from the rod.
The punp last above described may with advantage be employed as a feed pump,
or where intermittent action only is required.
Having now described my Invention in such manner that others will be enabled
to carry my improvements into effect, I claim,―
First. A pump constructed to act either as a liquid or aeriform fluid pump, sub-
stantially as set forth.
Second. A pump constructed or fitted with a movable cover or movable covers
provided with air suction and delivery valves, for the purpose set forth.
Third. A pump constructed or fitted with piston and sleeve so arranged as to be
connected or disconnected at will from the pump rod, substantially as set forth.
Fourth. A pump constructed, arranged, and operating substantially as and for the
purposes set forth.
In witness whereof, I, the said Edwin Paul, have hereunto set my hand and
seal, the Twentieth day of December, in the year of our Lord One thousand
eight hundred and seventy-seven.
JAMES JOHNSON,
Patent Office,
Clayton Square,
Liverpool.
Witness.
EDWIN PAUL. (L.S.)