An Improved Circulating or Air Pump Valve for Marine or other Steam Engines.
Year: 1886

page_text: Date of Application, 8th Apr., 1886.
Complete Left, 8th Jan., 1887.
Complete Accepted, 8th Feb., 1887,
PROVISIONAL SPECIFICATION.
An Improved Circulating or Air Pump Valve for Marine or other
Steam Engines.
I, JAMES STAVINGS WYNDHAM, of Ashton House, Clive Road, Cardiff, in the
County of Glamorgan, Engineer, do hereby declare the nature of this invention to be
as follows:-
My invention relates to an improved construction of valve for circulating or air
pumps.
In carrying it into effect, I use a disc of suitable metal capable of sliding freely
upon a vertical pin projecting from the centre of the seat of the valve.
The under face of the valve is packed by fixing to it in any convenient way two
rings of suitable material. Each ring is placed so as to contact with the face of the
seat along the edges of the annular way through the same.
The packing rings are either checked into the face of the valve or sewn thereto,
cement being used if desirable, or all these methods of attachment may be used.
Any suitable stop may be used to limit the play of the valve.
PHILLIPS & LEIGH,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improved Circulating or Air Pump Valve for Marine or other
Steam Engines.
1, JAMES STAVINGS WYNDHAM, of Ashton House, Clive Road, Cardiff, in the
County of Glamorgan, Engineer, do hereby declare the nature of this invention and
in what manner the same is to he performed, to be particularly described and ascer-
tained in and by the following statement:-
My invention relates to an improved construction of valve for circulating or air
pumps for marine or other steam engines, and consists in the combination with a
single rigid metallic lift valve, of two concentric elastic packing rings projecting
from its face and, therefore, bounding the annular space occupied by the way through
the valve seat.
The cutting of the necessary grooves to receive the two packing rings necessitates
the formation of two corresponding annular ridges upon the back of the valve,
bounding an annular channel. This channel becomes filled with water which latter
acts as a cushion between the valve and the guard.
In order that my invention, and the means by which the same may be carried into
practical effect, may be thoroughly understood, I will now describe the same in detail,
referring in so doing to the accompanying drawings which are to be taken as part of
this specification and read therewith, and in which like parts are marked throughout
with the same reference letter.
Fig. 1 is a plan of the back: Fig. 2 is a transverse sectional elevation; and Fig. 3,
a plan of the face of either the foot or head valve of a circulating or air pump, made
according to my invention.
Fig. 4 is a plan, and Fig. 5 a sectional elevation, of the pump bucket of a circu-
lating or air
pump.
A is the valve, and a, a', the two convex annular ridges formed upon its back.
The valve is a rigid plate of metal capable of a reciprocating beat upon a central
guide, B, the axis of which is coincident with that of the cylinder or pipe which the
valve controls.
The central guide, B, is expanded laterally into a valve guard or stop, C, through
which additional guides, c, may pass, for the purpose of keeping the valve, A, always
in a plane at right angles with its axis.
I form two annular grooves in the face of the valve opposite to the aforesaid
ridges, a, a, which grooves receive the two elastic projecting packing rings, b, b'.
These are of any suitable material, and are held in the grooves in any convenient way,
e.g., by being checked in by cement or glue, or by sewing as illustrated in the figures.
I do not confine myself to any particular method of fixing the rings in the valve face.
The two ridges, a, a, form an annular channel, D, between them, which naturally
becomes filled with water. This water acts as a cushion between the valve and the
guard during the work of the former, and prevents it and the guard suffering

page_text: unnecessary wear and tear. Holes, c², c', may be formed in the guard, C, to allow of
the ready escape of the cushioning water.
A valve constructed according to my invention is, therefore, perfectly rigid and
direct acting, and as it is cushioned upon both sides, it not only works noiselessly, but
is prevented from suffering the destructive wear and tear which valves of the construc-
tion in general use undergo.
In Figs. 4 and 5, E is the bucket with the ordinary packing rings, and E, the
piston rod. The way through the bucket is shewn as consisting of an annular band
of holes, e, e.
A is the valve a, a', the two convex annular ridges formed upon its back; B, the
central guide, and b, b, the two projecting elastic packing rings. C is the guard.
and, D, the annular space for the water cushion.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is:-
1. In a valve of the circulating or air pump of a steam engine, the combination of a
single metal disc, a guide or guides, two annular projecting elastic packing rings let
into the face of the valve, two annular ridges on the valve back and a valve guard or
stop, substantially as described with reference to the accompanying drawings.
2. In a valve of the circulating or air pump of a steam engine, the combination of
two concentric elastic packing rings projecting from the face of the valve, with two
corresponding convex ridges in the back of the valve, and the valve guard, substan-
tially as described with reference to the accompanying drawings.
PHILLIPS & LEIGH,
Patent Agents,
thampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.