Improvements in Pumps.
Year: 1892

page_text: Date of Application, 8th July, 1892
Complete Specification Left, 8th Apr., 1893-Accepted, 27th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in Pumps.
I, JAMES CADOUX HUDSON 75 Upper Ground Street Blackfriars Road London
Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the arrangement of the valves of
pumping engines. In a common form of double acting pump now in
use, 'the
delivery valves and suction valves are in layers one above the other. The delivery
valves are on a plate secured between a cover of the delivery valves and the
body of the pump with a cross partition to seperate the two ends of the pump
barrel in the suction valve chamber. The suction valves are on seatings on the
body of the pump.
For renewal or examination the cover is removed and the delivery valves
are disclosed; when the plate containing the delivery valves has been removed
the suction valves are disclosed. In order to dispense with the joints between
the cover and the delivery valve plate and between this plate and the pump body
.I construct the seatings of the valves in the following manner. The suction valve
is on a grid or seating, screwed on the out side and screwing into a plate formed
in the pump casting. The delivery valve which is immediately above the suction
valve is on a similar grid or seating screwed into a plate formed in the pump
casting and above that of the suction valve, but the hole into which it is screwed,
is large enough to pass through the suction seating and to give ready access to
that valve. When the pump valves are to be examined or renewed the cover over
delivery valves is removed and these valves can be taken off by removing a nut
or guard on the top of valve spindle; the grating or grid of this valve can then be
unscrewed and the suction valve exposed; by removing the nut or guard on the
spindle of suction valves, these valves can be extracted through the screwed hole
of delivery valve grating. It is not necessary to remove the suction valve grating
as this is screwed into the body of pump for convenience of manufacture only.
The valve can be made of metal or of hard or soft rubber or other material and
can be used for pumping air, water, or other liquid. This arrangement of valve
and grating enables a number of valves to be placed in one pump casting as the
latter can be made of comparatively simple form. It also enables the valves to
be used of the same diameter throughout although if found desirable the diameter
of suction or delivery can be either larger or smaller than the other.
screwed seating I can form a collar or flange on which a sound joint can be made.
When the valve is of hard rubber and lifts bodily I insert at its centre a metal
ferrule with collar top and bottom. The spindle works within this ferrule.
Dated this 8th day of July 1892.
On the
JAMES CADOUX HUDSON.
COMPLETE SPECIFICATION.
Improvements in Pumps.
JAMES CADOUX HUDSON Engineer 75 Upper Ground Street Blackfriars S.E.
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 :-
This invention relates. to improvements in the arrangement of the valves of
pumping engines. In a common form of double acting pump now in use the
-delivery valves and suction valves are in layers one above the other. The delivery

page_text: valves are on a plate secured between a cover of the delivery valves and the body
of the pump with a cross, partition to separate the two ends of the pump barrel
in the suction valve chamber. The suction valves are on seatings on the body of
the pump. For renewals or examination the cover is removed and the delivery
valves are disclosed.
When the plate containing the delivery valves has been removed the suction
valves are disclosed. In order to dispense with the joints between the cover and
the delivery valve plate and between this plate and the pump body, I construct the
seatings of the valves in the following manner.
The suction valve is on a grid or seating screwed on the outside and screwing
into a plate formed in the pump casting. The delivery valve which is immediately
above the suction valve is on a similar grid or seating screwed into a plate formed
in the pump casting and above that of the suction valve but the hole into which
it is screwed is large enough to pass through the suction seating and to give ready
access to that valve. When the pump valves are to be examined or renewed, the
cover over delivery valves is removed and these valves can be taken off by
removing a nut or guard on the top of valve spindle. The grating or grid of
this valve can then be unscrewed and the suction valve disclosed.
By removing the nut or guard on the spindle of suction valves, these valves can
be extracted through the screwed hole of delivery valve grating. It is not
necessary to remove the suction valve grating as this is screwed into the body of
pump for convenience of manufacture only. The valve can be of metal or of
hard or soft rubber or other material-and can be used for pumping air, water or
other liquid. This arrangement of valve and grating enables a number of valves to
be placed in one pump casting as the latter can be made of comparatively simple form.
It also enables the valves to be used of the same diameter throughout although
if found desirable the diameter of suction and delivery valves can be either larger
or smaller than the other. On the screwed seatings I can form a collar or flange
on which a sound joint can be made. When the valve is of hard rubber and
lifts bodily I insert at its centre a metal ferrule with collar top and bottom. The
spindle works within this ferrule.
The accompanying drawing is a section through a double acting piston pump
shewing the improved valve seats and valves and the form in which the pump
casting is made to receive them.
(A) are the suction valves, (B) the delivery valves, each valve is on a seating,
(C) being the seating for the suction valves and (D) that of the delivery valves.
Each seat is screwed on the outside and has a flange (C¹ D¹) so that when
the seat is screwed into the plate (E) receiving the suction valves (A) or the
plate (F) receiving the delivery valves (B) a sound joint can be made. The
screwed hole in plate (F) is large enough to allow the flange (C¹) to pass through.
(G) is a cover to the delivery valve chamber.
When the pump valves have to be examined or renewed, the cover (G) is
removed exposing the delivery valves (B), the nut on valve stalk unscrewed and
the valve taken off, the seating (D) unscrewed and the valve (A) immediately
below can be removed in a similar manner to (B). The screwed seating (C) need
not be taken out but it is advisable also to have it moveable for convenience of
manufacture.
The valves (A B) can be of metal or of hard or soft india rubber, when of
rubber I place a ferrule (H) with flange top and bottom to secure ferrule in
position and thus forming a good wearing surface to the centre hole of valve when
working on the spindle or stalk (J). I form a projection or lip (K) on the upper
and outer circumference of the valves (A B) to retain and protect the spring (L).
This arrangement of valve and seat enables a large number of valves to be placed
in one pump casting. The casting being made (the suction and delivery plates
and walls to suction and delivery chambers, pump barrel &c.) without the usual
joint at the upper and lower side of suction and delivery plates and at the cross
joints in the suction valve chamber, and the casting is of a practicable and simple

page_text: form. The suction valves may be larger than the delivery valves, the seats being
arranged accordingly.
Having now described the nature of my said invention and the manner of
performing the same, I would have it understood that I claim-
Firstly The form of suction and delivery valve seat screwed and with flange
and arranged as illustrated and described.
Secondly The flanged ferrule for valve centre as illustrated and described.
Thirdly The projecting lip on upper side of valves to retain and protect the
spring and arranged as illustrated and described.
Fourthly The manner of arranging the screwed seats in series as described in
a simple form of pump casting dispensing with the usual joints and cross joints as
illustrated and described.
April 8th 1893
JAMES CADOUX HUDSON.