Year: 1888

page_text: I, JOHN CHARLES RAYMOND OKES, of 39 Queen Victoria Street, London, in the
County of Middlesex, 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 improvements in valves and valve boxes for pumps, and is
more particularly applicable to that class of pumps which are used for pumping sewage,
sewage sludge, or other fluids of a thick consistency.
-
It consists essentially in constructing and mounting such valves and their seats so
that they form together a removable whole, which may be readily placed in position
in the valve boxes and removed therefrom through a suitable opening provided in the
latter for that purpose. The box is also provided with suitable means for fixing the
valve and its seat in position, and which enable them to be readily released when
required to be removed. It also consists in so shaping the valve plate that the
material being pumped will in its passage through the valve be directed upwards and.
find no obstacles against which it may lodge, whereby the valves will be much less
liable to clog or choke.
.
In the accompanying drawings my invention is shown as applied to a duplex
hollow plunger pump, but it will be readily understood that it may also be applied to
pumps of other construction.
In the accompanying drawings
Fig. 1 is a longitudinal section of the pump.
Fig. 2 a plan view partly in section.
Fig. 3 a transverse section through the suction box.
Fig. 4 an end elevation partly in section..
Fig. 5 a horizontal section through the hollow plunger valve.
Fig. 6 is a vertical section-through the delivery box showing a central spindle valve
annlied thereto

page_text: Fig. 7 is a horizontal section of Fig. 6.
Fig. 8 is a longitudinal section through the valve of the hollow plunger, showing a
modification in the means for securing such valve in position in its box.
Fig. 9 is a horizontal section of Fig. 8.
Fig. 10 shows a further modification of the means for fixing the valve in position.
A are the hollow plungers which are actuated by the steam cylinders B through the
connecting rods C, such plungers working through glands in the suction boxes D and
delivery boxes E, in the usual manner.
F are the valves with which each of the hollow plungers and the suction and
delivery boxes are provided, each of such valves being introduced into its valve
box through a suitable opening therein. The whole of the valves and boxes are of
similar construction, so that the following description of valve will apply equally to
all of them, as far as the principle of my invention is concerned.
Each valve box is provided with an opening G of sufficient area to allow the
valve F. and its plate H and seat I to be readily introduced and removed from the box,
such opening being provided with a suitable cover plate G which is secured in
position by bolts and studs after the valve has been introduced.
The valve F may be either a flap valve as shown in Figs. 1, 2, 3, 5, 8, 9, and 10, in
which case it is pivotted to the valve plate H, or it may be a flexible centre spindle
valve as shown in Figs. 6 and 7, the spindle of same being mounted in valve seat I,
or any other suitable description of valve may be employed.
The valve F, valve plate H, and valve seat I form a removable structure capable of
being inserted or removed bodily from the valve box, and either the underside of the
valve plate H or the surface in the valve box against which it abuts when in position
is preferably provided with a ring of india rubber J to ensure a tight joint.
The valve plate H is dish or saucer shaped as shown, whereby the substance passing
through the valve will be thrown or directed upward through the suction box, or the
plunger or delivery box, as the case may be, and there will consequently be less
chance of the valves choking, as there is nothing for sludge or other thick material to
hang upon.
The valve boxes are provided with external ears or lugs M through which work set
screws N bearing upon the upper edge of the valve plate H so as to securely hold the
latter in its position in the valve box. The tapped holes through which the set
screws N work are preferably at such an inclination as to exert a pressure on the valve
plate in a corresponding direction to the outward curvature of its sides, and thus bring
such pressure within the base of the plate, whereby all chance of the plate tipping up
which might otherwise occur from one screw being screwed too far inward, and the
consequent risk of breaking the plate by screwing home the screw bearing upon the
opposite edge of the plate, will be avoided.
In Figs. 8 and 9 a modification of the means for fixing the valve in the valve box
is shown, the upper surface of the valve plate H being wedge shaped as shown at O
and its lower end engaging under a correspondingly inclined abutment P in the valve
box, while a set screw working through the cover plate G₁ and bearing against the
top end of the valve plate forces it well into position. One or more screws Q₁may
also be provided and work through the valve box in a position to act upon the top
upper surface of the plate H, which is thus securely held in position in the valve box.
Fig. 10 shows a further modification in which the upper circular edge of the valve
plate His made thicker and has a circular groove formed in it to receive the ends of
the set screws N. The metal of the valve box is also made thicker at the part through
which the set screws work, thus avoiding the necessity of making separate bosses for
each screw, and enabling as many screws to be employed as is found desirable..
In all cases all that is requisite when it is desired to remove the valve, valve plate and
valve seat, is to release the valve plate from the pressure of the set screws, and remove
the cover plate G', when the whole structure can at once be pulled out through the
opening G in the valve box, and after being cleaned or repaired can be replaced, or a
new one substituted therefor.

page_text: 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. The improved construction of valve, valve plate, and valve box for pumps,
consisting in mounting the valve, valve plate and valve seat together so as to form a
single structure, and forming the valve box with an opening through which such
structure may be introduced or withdrawn, the opening being provided with a cover
plate to close same, all substantially as specified.
2. The means for holding the valve with its plate in their position in the valve box
after same has been introduced through the opening provided in the latter, in the
manner set forth in the preceding claim, such means consisting either in set screws
alone working through the valve box and bearing upon the valve plate, or in making
the upper surface of such valve plate wedge shaped, and causing it to engage with a
correspondingly shaped abutment in the valve box, in combination or not with set
screws working through the valve box and acting upon the valve plate, all substantially
as described and shown.
3. Making the valve plate of valves for pumps of a dish or saucer shape so as to
throw the material passing through the valve in an upward and outward direction,
substantially as and for the purpose specified.
Dated this 27th day of April 1888
ALLISON BROS.,
Agents for the Applicant.