Improvements in Valves of Pumps.
Year: 1890

page_text: Date of Application, 11th Sept., 1890
Complete Specification Left, 26th May, 1891-Accepted, 27th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Valves of Pumps.
We, JOHN RICHARDSON of South Park Lincoln Engineer & WILLIAM NORRIS
of 20 Altham Terrace Lincoln Engineer's Draughtsman, do hereby declare the
nature of this invention to be as follows:-
Our invention relates to an improved construction of pump valves and seatings
which presents certain advantages over the arrangements commonly adopted,
and our object is to secure a simpler, more efficient, more compact, and more
accessible combination of suction and delivery valves, than heretofore exists.
Our invention is applicable to all types of pumps; but is specially convenient as
applied to pumps of the duplex type otherwise known as the " Worthington" type.
In such pumps the delivery valves are sometimes secured to a separate plate bolted
between the body of the pump and the top cover; this plate we entirely dispense
with.
In one method of carrying our invention into effect we construct a conical or
taper seating having two seats one for the suction and one for the delivery valve;
The suction
this seating we force into a conical bore in the body of the pump.
valve occupies the lower seat while the delivery valve occupies the upper. The
delivery valve is kept in position by a ring, guides or feathers in any usual manner
and is thrust to its seat by a spring acting between it and the valve box or cover;
the suction valve carries a stem or projection on its upper side, which works in a
bored guide or cylinder formed on the lower side of the delivery valve. The
delivery valve thus forms the guide for the suction valve and also acts as a stop to
regulate the lift to any desired extent. The stem or projection on the suction
valve may be chambered to carry a spiral spring to act between it and the delivery
valve and so force the suction valve to its seat; or the delivery valve may be
chambered to a sufficient extent to carry the spiral spring to thrust against the
suction valve stem. In either case the delivery valve is arranged to form the guide
and stop for the suction valve. When we make the guide in the lower part of the
delivery valve for the suction valve stem, a closed cylinder, we make a suitable
aperture or apertures in the cylinder (towards the pump cylinder passage) in order
to allow the water or other liquid to move freely in and out of the said cylinder so as
to allow the suction valve to rise and fall freely during the operation of the pump.
When it is desired to resist too rapid movement of the suction valve we reduce the
aperture or apertures accordingly.
The conical valve seating which carries the two valves is perforated circum-
ferentially between the two valves in order that the passage or port leading to
Ribs may be
the pump cylinder may freely communicate between the valves.
used to connect the lower and upper parts of the seating in order to allow of a
sufficient area.
When the pump makes its suction stroke the water passes the suction valve to
the cylinder by way of these perforations in the seating, and the valve is guided
When the pump
by the delivery valve and checked by it at the determined lift.
forces, the lower valve seats itself and the delivery valve rises and the water is
forced through the perforations in the seating and escapes by the delivery valve
to the valve,casing.
With the seating and valves arranged in the manner hereinbefore described the
valves are easily accessible either by removing the valve box cover or by removing
small covers above each set of valves.
Dated this 10th day of September 1890.

page_text: COMPLETE SPECIFICATION.
Improvements in Valves of Pumps.
We, JOHN RICHARDSON, of South Park, Lincoln, Engineer, and WILLIAM
NORRIS of 20 Altham Terrace, Lincoln, Engineer's Draughtsman, 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:—
Our invention relates to an improved construction of pump valves and seatings
which presents certain advantages over the arrangements commonly adopted, and
our object is to secure a simpler, more efficient, more compact and more accessible
combination of suction and delivery valves than hitherto exists.
Our invention is applicable to all types of pumps but is specially convenient as
applied to pumps of the duplex type otherwise known as the "Worthington" type.
In such pumps the delivery valves are sometimes secured to a separate plate bolted
between the body of the pump and the top cover; this plate we entirely dispense
with.
In one method of carrying our invention into effect we construct a conical or
taper seating having two seats, one for the suction and one for the delivery valve;
this seating we force into a conical bore in the body of the pump. The suction
valve occupies the lower seat, while the delivery valve occupies the upper. The
delivery valve is kept in position by a ring, guides, or feathers, in any usual
manner, and is thrust to its seat by a spring acting between it and the valve box
or cover; the suction valve carries a stem or projection on its upper side which
works in a bored guide or cylinder formed on the lower side of the delivery valve.
The delivery valve thus forms the guide for the suction valve and also acts as a
stop to regulate the lift, to any desired extent. The stem or projection on the
suction valve may be chambered to carry a spiral spring to act between it and the
delivery valve and so force the suction valve to its seat, or the delivery valve may
be chambered to a sufficient extent to carry the spiral spring to thrust against the
suction valve stem. In either case the delivery valve is arranged to form the guide
and stop for the suction valve.
Referring to the accompanying sheet of drawings which illustrate pump valves
as constructed in accordance with our invention;
Figure 1 is a transverse section through the pump barrel at the suction and
delivery passage showing the novel arrangement of valves.
Figure 2 is a sectional plan on the line ab (Figure 1) and
Figure 3 is a view from below, of the delivery valve.
On the suction stroke the liquid passes from the suction chamber B by the
suction valve C and the passage I to the barrel or cylinder A; and on the discharge
or forcing stroke the valve C closes and the liquid is forced by the passage I to the
space between the two valves C and D and is discharged through the delivery
valve D to the delivery chamber K and the discharge pipe. A conical
hole is bored in the cylinder body and the valve seating E, E is turned to fit
and forced firmly into the position shown in the drawing Figure 1. The upper
ring E connects to the lower ring E' by the bridge pieces L, L1, L2, and L3 (Figure 2)
which bridge pieces are of sufficient strength but so proportioned as to leave a
clear way through from the passage I. The delivery valve D has wings H, H, H,
(Figures 1 and 3) guiding the movement of the valve in the bored upper part E of
the seating. These wings surround a bored tubular or cylindrical projection F
into which fits a corresponding cylindrical projection G from the suction valve C.
A spring O acting between the valves within G and F thrusts the suction valve to
its seat and a stronger spring N around a suitable projection keeps the delivery
valve to its seat. A small hole c is bored in F to allow of free flow of liquid from
within when the valve C is in action.

page_text: The upper valve D thus acts as an efficient guide for the lower valve C and serves
also to limit its lift to any predetermined extent. When the cover M is removed
the valves are at once accessible with their springs, guides and seats. It will be
readily understood that although we illustrate one pair of valves only in connection
with the pump barrel yet any convenient number may be used and instead of a
cover as M covering a group of valves, separate covers for each pair of valves may
also be used. When the guide in the lower part of the delivery valve is made as
herein before described for the suction valve stem we arrange the aperture c or an
equivalent passage or groove in order to allow the water or other liquid to move
freely in and out of the said hollow guide so that the suction valve may rise and
fall freely during the operation of the pump. When it is desired to resist too
rapid movement of the suction valve we reduce the aperture or apertures
accordingly.
Although we prefer to perforate the conical valve seating E, E¹ as hereinbefore
described and illustrated yet instead of ribs and spaces other perforations may be
adopted provided that sufficient area is allowed to permit of free movement of the
liquid pumped. In all arrangements under our invention however, when the pump
makes its suction stroke the water or other liquid passes the suction valve to the
cylinder by way of these perforations in the seating, and the valve is guided by the
delivery valve and checked by it at the predetermined lift. When the pump forces,
the lower valve seats itself and the delivery valve rises, and the water is forced
through the perforations in the seating and escapes by the delivery valve to the
valve casing. With the seating and valves arranged in the manner hereinbefore
described the valves are easily accessible either by removing the valve box cover
or by removing small covers above each set of valves.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
(1.) The arrangement of suction and delivery pump valves in which the lower
valve has a circular or tubular projection working in a similar projection, from the
upper valve, the upper valve serving as guide and stop to the lower substantially
as herein before described and illustrated in the accompanying drawings.
(2.) The arrangement of upper valve as D and lower valve as C with the tubular
projections as F and G together with springs arranged as N and O, the upper
spring N being stronger than the lower spring O and conical valve seating as E, E¹
substantially as and for the purposes hereinbefore described and illustrated in the
accompanying drawings.
Dated this 25th day of May 1891.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicants.