Improvements in Valve Seats and in Valves suitable for Pumps.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvements in Valve Seats and in Valves suitable for Pumps.
We, SARAH ADAMSON, of Rowlands, Mycenae Road, West Combe Park,
Greenwich in the County of Kent, Widow and Administratrix of Thomas Alfred
Adamson late of Rowlands, aforesaid, and ROBERT BELDAM, of 79 Mark Lane,
in the City of London, Merchant, 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 has reference to improvements in valve seats, and in valves
suitable for pumps.
In the Specification of a former application for Letters
Patent dated 27th October 1892 No. 19297, there is described the use, in
conjunction with a valve so constructed or formed at its under or suction side that
an intermittent rotary motion will be imparted to the valve by the action upon
such side of fluid passing through the pump to which the valve is applied, of a
valve seat formed with upwardly inclined openings through which the fluid being
pumped is caused to flow, and whereby a circular or rotary motion is imparted to
the fluid passing through such openings, such circular or rotary motion of the
fluid assisting in imparting an intermittent or step by step rotary motion to the
said valve.
Now it has been discovered since the date of the said application for Letters
Patent, that a valve seat constructed with upwardly inclined openings such as
referred to, can be advantageously used with valves other than those of the kind
referred to, as for example with valves that are quite flat or smooth at their.
suction or underside, and also that thin or sheet metal valves with a central boss
and outer strengthening and loading ring, but with a flat or smooth suction or
underside can be used with advantage with valve seats of the kind referred to and
the present invention relates inter alia to the construction and use of such valve
seats and valves as we will now proceed to explain with reference to the
accompanying drawings in which,
Fig. 1 is a vertical section of a valve seat and valve constructed according to
this invention, together with the valve guide stem and guard.
Fig. 2 is a plan view of the valve seat alone.
Fig. 3 is an underside view of the improved valve and,
Fig. 4 is a side or edge view thereof.
1 is the valve seat formed with tangentially arranged bars 2 that are of
considerable depth and are inclined to the face of the valve seat so as to form a
number of upwardly inclined openings or passages 3 through which water or other
fluid will ascend at each suction stroke of the pump to which the valve is applied,
and whereby such water or other fluid will, in consequence of such inclination of
the openings or passages, have imparted thereto a circular or rotary motion so
that it will, by acting against the under, or suction side, of the valve above such
seat, impart an intermittent or step by step motion to the valve at successive
strokes of the pump. By this means the wear of the valve seat and valve will
take place in a more uniform manner than has heretofore been usual. The bars 2
instead of being arranged tangentially as shown may be arranged radially.
The valve comprises a disc 4 of metal, for example copper, that is flat or smooth
at its underside, and is secured at its centre to a tubular boss or sleeve 5 and at its
outer circumference to a ring 6. The boss 5 and ring 6 may be of any suitable
material such as lead, or white or other metal, and may be secured to the disc 4 in
any convenient manner, as for example by casting, rivetting or soldering. Or the
sheet metal disc with ring 6 or with boss 5 and ring 6, may be cast in one piece.

page_text: The ring 6 serves as a convenient means of strengthening the thin disc portion of
the valve, and of loading the valve to the required extent.. 7 is a guide stem for
the valve. It is screwed at its lower end in the valve seat, and carries a guard 8
for limiting the upward movement of the valve. This guard may advantageously
be made with an annular groove or chamber at its underside as shown, to contain
fluid to assist in cushioning the valve when opening. In order to cushion the valve
when closing onto its seat, the outer annular surface of the said seat may be formed
with a groove or recess to contain liquid and into which takes a corresponding
ridge or projection on the underside of the valve, when the valve closes, the liquid
laying in the groove or recess then acting as a cushion. This construction is
shown in Fig. 5 which is a cross section of a part of the valve seat and valve,
9 being the groove or recess in the valve seat, (shown in dotted lines in Fig. 2)
and 10 the corresponding ridge or projection on the underside of the valve. The
ridge 10 may in some cases be dispensed with. Valves having their underside
constructed as described in the said former Specification may be cushioned in a
similar manner.
Valves that are flat or smooth at their suction or underside as described, may
also according to this invention, have imparted to them an intermittent or step by
step rotary motion by providing them at their periphery with wings or projections
so arranged that as the liquid at each stroke of the pump issues laterally from
beneath the valve, it will act against the said fins or wings or projections and
partially rotate the said valve.
Fig. 6 shews in vertical section a valve thus constructed together with its seat
and guard.
Fig. 7 shews the valve seat alone in plan.
Figs. 8 and 9 show the valve alone in side elevation and plan respectively.
In this construction the valve seat is of the ordinary kind, that is to say the
bars 2 are not inclined to the vertical and are radial. The valve comprises a
metal disc 4 flat or smooth at its suction or underside and secured as before to a
tubular boss or sleeve 5 and a ring 6. This ring is formed with wings 6ª all of
which project at an angle and in the same direction from the periphery of the
ring 6 below the under surface of the valve as shown. These wings may be
arranged vertically as shewn in full lines in Figs. 8 and 9 in which case the water,
as it issues laterally from beneath the valve will act against them and imparts a
partial rotary motion to the valve at each stroke of the pump, or they may in some
cases be inclined to the horizontal as indicated by the dotted lines in Figs. 8 and 9,
so that the water, in ascending around the valve, will also act against the said
wings and aid in imparting rotary motion thereto.
When the wings are thus inclined to the horizontal they may be arranged
radially with reference to the periphery of the valve. 8 is a guard as before.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A valve seat constructed with bars inclined to the face of the valve seat so as
to form upwardly inclined openings or passages substantially as described and
shown for the purpose specified.
2. A pump valve composed of thin or sheet metal that is flat or smooth at its
underside and is formed or provided at its centre with a guiding boss and at its
outer periphery with a strengthening ring that also serves to load it substantially
as described and shown.
3. The combination of a valve seat constructed with upwardly inclined openings
for passage of water and with a groove or recess such as 9 in the valve face, and a
valve of the kind herein referred to whether constructed at its under or suction
side with a ridge or projection such as 10 adapted to enter the said groove or
recess in the valve seat or not as herein-before described with reference to and
shown in Fig. 5 for the purpose mentioned.

page_text: 4. A pump valve provided at its periphery with wings or blades such as 6ª
arranged substantially as herein described for the purpose specified.
Dated this 28th day of August 1893.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants.