Improvements in Pump Valves.
Year: 1889

page_text: Date of Application, 15th Apr., 1889
Complete Specification Left, 13th Jan., 1890-Accepted, 15th Feb., 1890
3:
PROVISIONAL SPECIFICATION.
Improvements in Pump Valves.
I, DONALD BARNS MORISON, of 8 Albion Terrace, Hartlepool, in the County of
Durham, Engineer, do hereby declare the nature of this invention to be as follows:-
My Invention relates to that class of pump valves which are formed to give a
double opening for the passage of the liquid passing through the pump. The valves,
proper, are circular conical plates with a circular opening in the middle, the metal
round the opening being "flanged" or turned up to give ample guiding surface on.
the central guide, they may be stamped from a sheet of suitable metal such as brass
or delta metal, or they may be cast.
The valves are preferably so placed that the apex of the cone is downwards.
This gives a more easy discharge for the fluid at the circumference of the valve, than
a flat plate would.
The conical shape of the valve also strengthens it considerably, and by retaining
the fluid on its upper surface serves to reduce the shock of the opening of the valve.
The valve guards or stoppers are made to fit the valves, and are formed with a
projection which forms a central guide for the valves, and which fits into a recess
in the valve seat. The lift of the valves is regulated by placing discs or washers
in this recess.
The guards may be secured to the valve. seats in any ordinary manner; but
for feed-pumps and pumps for similar purposes, they are preferably held in place by
a pin passing through the valve chest cover. In circulating and other pumps,
where the valves are in groups, one guard may serve for several valves. The guards
being suitably secured by bolts or studs:
Springs may be fitted between the valves and guards in suitable recesses formed in
the guards.
COMPLETE SPECIFICATION.
Improvements in Pump Valves.
I, DONALD BARNS MORISON, of 8 Albion Terrace, Hartlepool, in the County of
Durham, Engineer 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 improved forms of pump valves, with their seats and guards
and to methods of holding down the same.
"
The valves proper are circular conical plates with a circular opening in the
middle, the metal round, the opening being preferably "flanged or turned up to
give ample guiding surface on the central guide, they may be stamped from a sheet
of suitable metal such as brass or delta-metal or they may be cast.
The valves are preferably so placed that the apex of the cone is downwards.
This gives a 'more easy discharge for the fluid at the circumference of the valve than
a flat plate would.
The conical shape of the valve also strengthens it considerably and by retaining
the fluid on its upper surface serves to reduce the shock of the opening of the valve.
The valve guards or stoppers are made to fit the valves, and are formed with
a projection which forms a central guide for the valves, and which fits into a recess
in the valve seat. The lift of the valves may be regulated by placing discs or washers
in this recess.

page_text: The guards may be secured to the valve seats in any suitable manner; but for
feed-pumps and pumps for similar purposes they are preferably held in place by a pin
passing through the valve chest cover.
In circulating and other pumps where the valves are in groups, one guard
may serve for several valves.
The guards being suitably secured by bolts or studs.
Springs may be fitted between the valves and guards in suitable recesses formed
in the guards.
In order that my invention may be understood, I append four sheets of
explanatory drawings, in which corresponding parts are denoted by the same
numbers.
Figure 1 sheet 1, shews a valve made of cast brass or other suitable alloy,
in accordance with this invention.
Figure 2 sheet 1 shews a stamped valve of similar form.
Figure 3 sheet 1 shews a stamped valve the surface of which is conoidal rather than
conical.
Figure 4 sheet 1 shows a stamped valve without "flanged" central guiding
surface.
Figures 5 and 6 sheet 1, shew one form of seat and guard suitable for these valves,
1 is the seat which is shaped to exactly correspond with the surface of the valve, 2 is
the guard having a central opening 3, to allow of the escape of fluid at the inner
circumference 4. Three screws 5 are provided for holding down the guard, the jam
nuts 12 preventing the screws from working loose. This form of guard is suitable
when the valve chest door is on the side of the chest and not on the top, the screws
then bearing against the metal surface with their points 6 and so causing the guard to
bear upon the valve seat at the points 7 and 8. The guard thus serves the double
purpose of securing the valve seat and of regulating the lift of the valve.
Should an increase of lift of valve be required a disc or washer may be placed
between the guard and the seat at the point 7.
Figure 7 sheet 1 shews an arrangement similar to figures 5 and 6 ; but having a
spiral spring 9 between the valve and guard. A spiral spring may be fitted in a
similar manner to any of the arrangements described and illustrated, if required.
Figures 8 and 9 sheet 2, shew another arrangement of valve, seat, and guard. The
valve chest cover in this case being above the valve and the holding-down pin 11 being
screwed through it, thus holding the valve guard 3 and seat 1 firmly in place. A jam
nut 12 is provided to prevent the screw 11 from working loose.
Figure 10 sheet 2 shews a similar arrangement with two valves one above the
other, as often occurs with the suction and discharge valves of a pump. In this case
the valve chest cover is not above the valve. The valve guards 2 have projecting
pieces 13 which are screwed and fitted with two nuts 14 and 15. These nuts in the
case of the upper valve may bear upon a bridge 16, should the discharge opening be
directly over the valve. In the case of the lower valve the nuts bear against a
suitably formed projection upon the upper valve seat.
It will be easily seen that the arrangement of a pin or its equivalent for holding
down two or more valves may be applied to Figures 5, 6, 7, and 8.
Figures 11 and 12 sheet 3 shew various forms of valve guards arranged upon a
seat suitable for circulating or other pumps.
(a) shews a valve guard screwed into the seat by a projecting screw 17.
shews a valve guard with a projecting screw 17 secured by a nut 18. The
screw may be part of the guard or may be tapped into it.
(c) shews a valve guard secured by a stud 19 screwed into the valve seat.
shews a valve guard secured by a screw or pin 20.
Figure 13 sheet 3 shews an arrangement of valve and guard suitable where it
is not necessary to use the central opening for the passage of fluid. A central stud 19
is screwed into the valve seat 1. The valve guard is screwed to suit this, and secured
in position by a pin 21 passing through the stud.
Figures 14, 15, 16, 17 sheet 4 are views of the valve chest of a duplex pump with
valves, seats, and guards similar to those shewn in Figures 8, 9 and 10. Figure 14

page_text: is a front view with the doors removed. Figure 15 is a plan. Figure 16 is a
sectional elevation shewing suction and delivery valves and method of securing the
same in place. Figure 17 is a sectional plan.
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.) Pump valves, whether cast, stamped or otherwise manufactured of the forms
hereinbefore described and illustrated more particularly with reference to Figures 1,
2, 3, and 4.
(2.) The various arrangements and combinations of valves, seats, and guards,
substantially as described and illustrated.
(3.) The various arrangements for holding down valve guards and seats sub-
stantially as described and illustrated.
(4.) The arrangements for securing two or more valve guards and seats by a pin
or its equivalent which holds down one, substantially as described with reference to
figures 10 and 16.
(5.) The arrangement of valves and seats for duplex pumps substantially as
described and illustrated in Figures 14, 15, 16, and 17.
Dated this 11th day of January 1890.
D. B. MURISON.