Improvements in or relating to Valves.
Year: 1894

page_text: Date of Application, 14th Nov., 1394-Accepted, 9th Mar., 1895
Improvements in or relating to Valves.
1, CHRISTIAN HAMILTON GRAY, of The Indiarubber Gutta-percha and
Telegraph Works Company Limited, of Silvertown, in the County of Essex,
Indiarubber Manufacturer, 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 air or other valves suitable for pneumatic tyres and for
other purposes and to coupling devices suitable for securing flexible tubes in various
ways.
The invention will be best understood by reference to the accompanying drawings
in which
Figure 1 is a section of a complete valve constructed according to this invention
and
Figure 2 shows the valve itself in perspective.
Like letters represent like parts throughout the drawings.
A is a portion of the air tube of a pneumatic tyre (or other article to which the
valve is attached) to which the disc or sheet B (conveniently circular) is secured
preferably by solution. The nipple C constitutes the valve proper and consists of
hollow protuberances upon the dise B; one or more incisions or dividing of the
material C in this forms the valve opening through which the air when the tyre is
being charged is forced by the pump, escaping as indicated by the arrow in Figure 1
into the interior of the air tube. The shape of C may be varied at pleasure so long
as the air pressure will keep the valve or opening C₁ closed so as to prevent the
escape of air. The disc B has a hollow stem or tube D which passes through an
opening A in the air tube and projects on the outside. Into this stem D fits a
metal, vulcanite or other valve body E which may be cylindrical as shown, or of
other suitable form and may be roughened, corrugated or otherwise arranged so as
to tightly fit the tube D. The outer portion of the valve body E is enlarged and
screwed externally as at El and if desired also internally as at E2 either of which
threads may serve to receive the pump nozzle. Upon the thread E' screws the
nut F which may be milled on its periphery for the purpose of being screwed up
by hand or it may be square or provided with holes to receive a spanner, the
purpose of this nut being to secure the whole valve fitting in the tyre of the wheel
which would lie between the nut F and the air tube A.
The sleeve G is preferably provided with a flange or collar G' so as to provide a
good bearing upon the air tube and prevent cutting it and also to bear upon the
rim of the wheel; this sleeve I prefer to make of thin metal and after the valve
body E has been placed inside the stem or tube D I place this sleeve in position
and then by suitable means such as closing dies or in some cases by spinning or by
other means I close the sleeve G tightly upon the tube D pressing it in turn firmly
upon the valve body E upon which solution may have been placed if desired before
it was put into D to assist in securing an air tight joint. By means of this sleeve G
a tight junction between the body E and tube D is effected in a more satisfactory
manner than the usual plan of binding with wire or the like, while the sleeve
supports the other parts where they pass through the rim of the wheel.
H is a pin or rod provided if desired with a head H' and fitting loosely in the
body E so that the air can pass through this pin and the body and thus enter the
interior of the valve or the pin may fit almost tight in the body and may have a
longitudinal flat or groove to allow of the passage of the air or it may be perforated

page_text: for this purpose. The pin H is useful for deflating purposes as its outer end projects
beyond the body and by pressing upon it the incision in the nipple C may be opened
as shown in Figure 1 where two incisions C' are shown and the air allowed to
escape; excepting when so opened or when opened by the pressure of the air forced
in by the pump, the incision C' remains closed air tight so that no air can escape
from the interior of the tyre. The greater the pressure of the air the more tightly
is the valve closed while the air pressure on the disc B tends to hold it firmly against
the interior surface of the air tube A. which would be compressed between the disc B
and the rim of the wheel.
It will be seen that the pin H does not touch the lips of the valve proper, viz.
the incision C, but to open them for deflation purposes merely presses against the
head of the nipple C and so stretches the cuts C₁ open without damaging them.
Were the cut made in the plane of the axis of the valve as in some foot valves for
pumps the pin would act directly upon the lips of the valve and open them by a
wedge action and thus damage them.
As when using this valve for pneumatic tyres the disc part B in taking the form
of the tube necessarily folds over more or less closely upon the nipple it is
sometimes of importance especially in small tyres when fixing the valve in the
air tube, to insure that the cuts lie in the longitudinal line of the tyre and not
across it. To facilitate this as the cuts close entirely and are not visible unless
opened I prefer to make some indication upon the disc B to show where the
incisions are and a convenient way of carrying this into effect is to mould an arrow I
upon the face of the disc either in the line of the cuts, or across them, so that the
person fixing the valve then knows exactly which way he is placing the cuts without
having to open them to ascertain.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The combination and arrangement of parts constituting the complete air
or similar valve substantially as described and illustrated in the accompanying
drawings.
2. A rubber air or similar valve comprising a nipple such as C C¹ disc or sheet
such as B and tube or stem such as D substantially as described and illustrated in
the accompanying drawings.
3. In an air or similar valve a nipple such as C having one or more cuts such
as C¹ in a plane cut in the line of the axis of the valve.
4. In an air or similar valve the combination with an incised or divided valve
such as CC of a pin such as H for opening the said valve substantially as
described.
5. In an air or similar valve the combination with a soft tube or stem such as D
and a hard valve body such as E of a compressible sleeve such as G substantially
as and for the purpose described and illustrated in the accompanying drawings.
Dated this 14th day of October 1894.
W. P. THOMPSON & BOULT,
Agents for the Applicant.