IMPROVEMENTS IN VALVES
Year: 1882

page_text: LETTERS PATENT to William Jones of Glasgow in the County of Lanark and
John MacLeod of Birkenhead in the County of Chester for an invention of
"IMPROVEMENTS IN VALVES"
PROVISIONAL SPECIFICATION left by the said William Jones at the Office
of the Commissioners of Patents on the 24th March 1882.
WILLIAM JONES, of Glasgow, in the County of Lanark, and JOHN MACLEOD, of
Birkenhead, in the County of Chester, "IMPROVEMENTS IN VALVES,"
This Invention relates to certain improvements in the construction of valves
such as the valves of pump buckets and other parts of pumps, and is designed
to render such valves more durable and efficient in action than as ordinarily
constructed.
In the usual construction of valves for such purposes, the rubber disc forming
the valve is formed with a hole in the centre where it is secured, and by the
bending of the disc in opening and closing the valve, it tears or gives way very
rapidly round this hole; but by the present Invention the valve is formed of a
complete disc or plate of rubber, canvas, or other flexible material which is held
at its outer edges while the central part is free to rise and fall, to open or close the
valve.
The valve seat may be a plane surface, but we prefer to make it slightly
concave, and fit or mould the valve to the shape of the seat, so that it may form a
perfectly tight joint. The seat is formed with, central openings through which the
water passes, and the flexible valve is by preference formed slightly oblong to
allow the water to pass freely. A guard, which may be arched, is fitted over the
valve, and is bolted down to the seat with the outer ends of the flexible valve
fixed between like a washer. For pump buckets, the guard may also be made
oblong, or of less diameter than the cylinder or barrel in which it works, and the
pump rod may be attached to the guard, in which case the bolts connecting the
valve seat and guard may be formed with shoulders to form a solid bearing between
them.
In large air-pump buckets for marine engines and such like cases, the improved
valves may be ranged radially round the pump rod, as is common with ordinary
valves,

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Jones in the.Great Seal Patent Office on the
23rd September 1882.
WILLIAM JONES, of Glasgow, in the County of Lanark, and JOHN MACLEOD, of
Birkenhead, in the County of Chester "IMPROVEMENTS IN VALVES'
"
Our said Invention relates to certain improvements in the construction of valves,
such as the valves of pump buckets, and other parts of pumps, and is designed
to render such valves more durable and efficient in action, than as ordinarily
constructed.
In the usual construction of valves for such purposes, the rubber disc forming
the valve is formed with a hole in the centre where it is secured, and by the
bending of the disc in opening and closing the valve, it tears or gives way very
rapidly round this hole; but by the present Invention, the valve is formed of a
complete disc or plate of rubber, leatlier, canvas, or other flexible material, which
is held at its outer edges while the central part is free to rise and fall to open or
close the valve. The valve seat may be a plane surface, but we prefer to make it
slightly concave, and fit or mould the valve to the shape of the seat, so that it may
form a perfectly tight joint. The seat is formed with central openings through
which the water passes, and the flexible valve is by preference formed slightly
oblong to allow the water to pass freely. A guard, which may be arched, is fitted
over the valve and is held down to the seat with the outer ends of the flexible
valve fixed between like a washer. For pump buckets, the guard may also be
made oblong, or of less diameter than the cylinder or barrel in which it works,
and the pump rod may be attached to the guard, in which case the bolts connecting
the valve seat and guard may be formed with shoulders to form a solid bearing
between them. When the pump-rod is secured direct to the bucket or piston, a
hole is formed in the rubber disc, but is made large enough to clear the pump-rod,
so that there is no action tending to rupture the valve disc at this hole.
In large air pump buckets for marine engines and such like cases, the improved
valves may be ranged radially round the pump rod, as is common with ordinary
valves.
Our Invention is illustrated in the accompanying Drawings, in which figure 1 is
a side elevation of a pump bucket fitted with our improved valve, and figure 2 is
a sectional plan of the same. Figure 3 is a plan and. figure 4 a side elevation of
an improved valve as adapted for a circulating or foot valve. Figures 5 and, 6
are a vertical section and sectional plan respectively of a large air-pump bucket
fitted with a single valve of our improved construction. Figure 7 is a plan,
showing a series of the improved valves as applied to a large pump bucket, or the
bottom of an air-pump cylinder, and figure 8 is a plan illustrating one mode of
constructing our improved valves.
The improved valve is formed of a sheet or disc 'A of rubber or similar elastic
or flexible material which is fitted over the valve seat B, and is secured at its
outer edges by means of gripping pieces, by preference connected in the form of a
guard C and bolted by bolts F through the outer edges of the valve to the valve
seat B. The valve seat B is made slightly concave or hollowed, and the valve A
is by preference moulded to the shape of its seat, and made wide enough to cover
the openings b'in the seat while so formed when used for pump buckets, as to
leave a free space D on each side of the bucket for the passage of the water,
when the valve rises to the position indicated by the dotted lines. The forming
of the valve to leave this space D, though advantageous, is not always essential.

page_text: In the bucket shown in figures 1 and 2, the pump-rod E is secured to the guard C,
and the valve A is made of an entire disc or sheet of rubber or flexible material.
When however the pump rod is secured to the bucket direct in the usual way, as
shown in figures 5 and 6, a hole a must be cut in the centre of the valve to clear
the pump rod E. The valve is not in any way secured or held at this opening a,
which is made of considerably greater diameter than the pump rod to clear it,
In figure 6, part of the guard C is shown as cut away to show the valve A below,
and part of the valve is cut away to show the grating or openings b.in the seat B.
which is formed on the bucket B¹. When the pump rod E is thus secured to the
bucket B¹, the guard C may be dispensed with, and gripping pieces only be fitted
to secure the edges of the valve A to the seat B. When applied as a circulating
foot or head valve, the seat may be formed as in figures 3 and 4, and secured to or
made to form part of the carrying web. The guard C is in general provided to
limit the extent of lift of the valve A, and it is by preference made of only the
same breadth as the valve A to leave free space as at D for the passage of the
water.
•
The valves shown applied to the air-pump bucket or bottom of the pump
cylinder, as indicated in figure 7, are of the construction shown in figures 3 and 4.
In one case, the valve is entirely removed to show the grating b, in another the
guard C is removed to show the valve. The improved valve A may be disposed
otherwise as is common with the ordinary construction of rubber valves, and when
necessary it may be fixed in a vertical or inclined, or even in an inverted
position.
We prefer to construct the improved valves of rubber cloth or canvas A', as
shown in figure 8, of a single layer or a number of layers which are bound round
about the cut edges, and at the opening a for the free passage over the pump rod,
by strips of rubber-cloth or canvas a' attached by rubber solution, and secured by
one or more rows of stitching a² on both sides; and round the edges of this rubber
cloth or canvas body, a layer or covering of rubber is fixed or formed as indicated
by the dotted lines by preference by moulding. Small holes fare cut in the valves
for the passage of the securing bolts F.
.
Having thus described our said Invention, and the manner of performing the
same, we have to state that we do not restrict ourselves to the precise details herein
described or delineated, but what we believe to be novel and original, and therefore
claim as the Invention secured to us, by the herein before in part recited Letters
Patent is,
The forming and securing of flexible valves for pump buckets, and for water
circulating and other purposes, substantially in the improved manner herein
described and delineated.
In Witness whereof, I the said William Jones, on behalf of myself, and
the said John MacLeod, have hereunto set my hand and seal this Twenty-
first day of September, in the year of our Lord One thousand eight
hundred and eighty-two.
5 Witness
WALLACE FAIRWEATHER C.E
96 Buchanan Street
Glasgow.
WILLIAM JONES. (L.S.)