IMPROVEMENTS IN DOUBLE-ACTION PUMPS
Year: 1878

page_text: LETTERS PATENT to Charles Frederick Amos and Henry Wilson Ringrose
Smith, both of Kingston-upon-Hull, in the County of York, Engineers, for the
Invention of "IMPROVEMENTS IN DOUBLE-ACTION PUMPS."
Sealed the 8th October 1878, and dated the 9th July 1878.
PROVISIONAL SPECIFICATION left by the said Charles Frederick Amos and
Henry Wilson Ringrose Smith at the Office of the Commissioners of Patents
on the 9th July 1878.
CHARLES FREDERICK AMOS and HENRY WILSON RINGROSE SMITH, both of
Kingston-upon-Hull, in the County of York, Engineers. "IMPROVEMENTS IN
DOUBLE-ACTION PUMPS."
The object of this Invention is so to construct double-action pumps as to render
access to the valves easy, without necessitating the displacement or disarrangement
of the pump gear. To this end we so arrange the valves in the pump cylinder or
cylinders that they shall open outwards or towards doors or covers which close the
ends of the cylinders. Thus when the valves require mending, or when any
obstruction occurs to interfere with their efficient action, by simply removing the
doors or covers the interior of the pump may be brought to view; thus any defect
or obstruction may be readily removed.
In carrying out the Invention we may use one cylinder, divided into two by a
transverse partition to receive the valved pistons, or two cylinders may be used set
parallel to each other. When the cylinders are set end to end communication is
made between them by means of a passage leading from the inner end of one
cylinder to the outer end of the other. The piston rods we connect with an arm
pendent from a central rock shaft, which carries a lever for working the pump.
The water will be admitted to the pump through an opening between the two
cylinders, and its course will be through one valved piston, thence through the
Povice 6d1

page_text: passage leading to the 2nd cylinder, through the valved piston of that cylinder, and
then out by the delivery pipe near the outer end of the 2nd cylinder.
This arrangement allows of the cylinders being closed at their outer ends by a
door or cover, the removal of which may be effected without interfering with any
of the working parts of the pump. The like advantages are obtained by placing
two pump cylinders parallel to each other, and connecting them by means of a
passage, which will bring the stuffing box end of one cylinder into communication
with the end of the other cylinder, which is closed by a door. The piston rod
in this case will be connected to a rock lever, which may be actuated by a hand
lever.
In this case, as in the first-described arrangement, the valves of the two cylin-
ders may be examined and adjusted by simply removing the doors which close the
ends of the cylinders.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Frederick Amos and Henry Wilson Ringrose Smith in the
Great Seal Patent Office on the 9th January 1879.
CHARLES FREDERICK AMOS and HENRY WILSON RINGROSE SMITH, both of
Kingston-upon-Hull, in the County of York, Engineers. "IMPROVEMENTS IN
DOUBLE-ACTION PUMPS."
The object of this Invention is so to construct double-action pumps as to render
access to the valves casy, without necessitating the displacement or disarrangement
of the pump gear. To this end we so arrange the valves in the pump cylinder or
cylinders that they shall open outwards or towards doors or covers which close the
ends of the cylinders. Thus when the valves require renewing or when any
obstruction occurs to interfere with their efficient action, by simply removing the
doors or cover the interior of the pump may be brought to view; thus any defect
or obstruction may be readily removed.
In carrying out the Invention we may use one cylinder, divided into two by a
transverse partition to receive the valved pistons, or two cylinders may be used set
parallel to each other.
In the accompanying Drawing both these plans for carrying out our Invention
are illustrated.
Fig. 1 is a longitudinal sectional elevation of a double-action pump with its
cylinders set in line; Fig. 2 is a sectional plan of the same taken in the line 1, 2,
of Fig. 1; and Fig. 3 is a vertical section taken in the line 3, 4, of Fig. 1.
This form of pump is intended to be bolted to a wall, and for this purpose it is
cast with lugs to receive the supporting bolts.
The pump is made preferably of a single casting A, the cylindrical ends A¹, A²,
for receiving the pistons B, B, being closed by swing covers or doors a, and the
central portion As having an open side to admit the gear within the pump. This
open side is closed by a plate or cover a¹, which carries a stuffing box for receiving
the spindle C of the pump. The inner end of this crank spindle works in a socket
provided to receive it on the inner face of the chamber A³. Pendent from the
spindle C is an arm C¹, which enters a slot formed near the middle of the rod B₁,
which carries at its opposite ends the pistons. B.-B... This arm C₁ serves as the
spindle C is rocked to impart a reciprocating motion to the rod and its pistons.
These pistons are made hollow, and are fitted with clack valves, which open out-
wards. The inner end of the pump cylinder A² is closed by a partition a², which
forms part of the casting A, and is fitted with a stuffing box, through which the
piston rod B¹ slides. The inner end of the other cylinder A2 is open to the central
chamber As in which the spindle C and arm C¹ are situate, and in communication
with this central chamber is the feed passage D of the pump. The cylinder A¹
communicates with the cylinder A2 by means of a horizontal passage D', which
thus brings the discharging end of the one cylinder into communication with the
receiving end of the other cylinder. D2 is the discharge passage from the cylin-
der A², it being for convenience led back from the end to the centre of the casting A.
The spindle C is fitted externally with a hand lever C², by the working of which
the pump is kept in action.
As a reciprocating motion is imparted to the pistons water or other liquid
entering by the passage D will flow into the central chamber, thence through the
piston of the cylinder A¹, and by the passage D¹ to the back of the piston in the
cylinder A². The water passed through the piston of this cylinder will at the next
forward stroke of the piston be forced up the passage D², and discharged from the
pump.
It will now be understood that if the pump leathers require renewing, or if the
pump has become clogged, access may be obtained to the interior of the pump by
simply uncovering the ends of the cylinders, which may be readily done by unship

page_text: ping the eye bolt, Fig. 1, and turning the cover on the remaining bolt, which will
act as a pivot pin, and thus by our arrangement all necessity for unshipping the
pump gear is avoided.
Fig. 4 is a sectional elevation of a pump. with its cylinders set parallel to each
other, and arranged to secure the advantages of renewing the pump leathers, and
removing any obstruction to the free action of the pump by the simple uncovering of
the cylinder ends.
As similar letters of reference for like parts are used in this and the above-men-
tioned Figures no detailed description of this pump will be required.
The piston rods it will be seen work through stuffing boxes in the ends of their
respective cylinders, and are connected by links to a beam B², which receives a
rocking motion from a connecting rod B³ leading from gearing which may be
actuated by manual or steam power.
The covers a of the cylinders will in this arrangement be held in place by a
series of bolts and nuts, the removal of which will be required to give access to the
interior of the pump.
Having now set forth the nature of our Invention of "Improvements in Double-
action Pumps," and explained the manner of carrying the same into effect, we wish
it to be understood that under the above in part recited Letters Patent we claim,
the arrangement of double-action pumps, as above described, whereby access is
gained to the valves without displacing or disarranging the pump gear.
In witness whereof, I, the said Charles Frederick Amos, have hereunto set
my hand and seal, this Seventh day of January, in the year of our Lord One
thousand eight hundred and seventy-nine.