Improvements in Valves for Use with Pneumatic Tyres, or in other Cases where Vessels, or Chambers, are to be Charged with Fluids.
Year: 1896

page_text: Date of Application, 6th Oct., 1896
Complete Specification Left, 6th Aug., 1897-Accepted, 25th Sept., 1897
Improvements in Valves for Use with Pneumatic Tyres, or in other
Cases where Vessels, or Chambers, are to be Charged with Fluids.
I, CHARLES FITZ ROY ALEXANDER HALLIFAX BAGOT of 59 Cadogan Square in
the County of London Esquire do hereby declare the nature of this Invention to
be as follows:
My Invention has for its object to provide a simple and efficient valve intended
more especially for use with pneumatic tyres but applicable also in other cases
where vessels or chambers are to be charged with fluids.
According to my Invention the main body of the valve is filled with rubber or
other suitable resilient material, (which I will refer to as "rubber") in such a way
that when the valve is closed and the rubber is compressed it makes an air tight
joint between itself and the internal surfaces in the interior of the valve casing
outward of the valve so that air cannot leak out.
In a valve made according to my Invention, as applied to a pneumatic tyre,
the body of the valve casing is made with a head at its inward end between which,
and a plate which bears against the interior of the rim of the velocipede the
material of the air chamber around the margin of the orifice through which the
said head protrudes, is gripped. The said casing can be of the usual shape and
is screwed externally and the said plate which is provided with an orifice corre-
sponding in shape to the casing is secured in position by a nut screwed onto the
said casing and bearing on the plate and a nut screws also onto the said casing to
bear on the rim to secure the casing to the rim. The foregoing parts are, or may
be, like those used in ordinary valves for pneumatic tyres. Upon the upper part
of the said casing is screwed a cap having a space in it above the top of the casing
in which is placed a washer or filling of rubber. Projecting from the inner side
of the said cap is a tubular piece which carries a tubular piece of rubber filling
in the space between the inside of the casing and the central valve spindle except
a space between the said spindle and the interior of the rubber tubular piece
sufficient to allow of the passage of air in inflating the tyre. The valve proper
on its outward face which bears against the inward end of the said tubular rubber
piece is preferably made of a partly flattened and partly domed shape and it may
be of smaller diameter than the said tubular piece so as to give an effective closure
of the valve by distorting the rubber. Below the valve is a continuation which
is squared or equivalently formed and which engages in a correspondingly formed
opening in the head of the valve casing so as to prevent the valve from turning
but so as also to leave a way for the inlet of air. The valve may be pressed
outwards by a spring which can conveniently be a coiled spring beneath the valve.
The valve stem is screwed at its outer end to receive a dust cap by tightening which
the valve is drawn up to its seat and the rubber tubular piece and washer afore-
said are compressed so as to give a very secure closure against the surfaces by which
the air would otherwise be liable to leak. The top of the said tubular rubber piece
and the said rubber washer may be joined together or both parts be formed in one
piece or they may be separate.

page_text: I have described the valve as applied to a pneumatic tyre but it will be under-
stood that it may be applied to other vessels or chambers in an analogous manner.
Dated this 6th day of October 1896.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.
Improvements in Valves for Use with Pneumatic Tyres; or in other
Cases where Vessels, or Chambers, are to be Charged with Fluids.
I, CHARLES FITZ ROY ALEXANDER HALLIFAX BAGOT of 59 Cadogan Square in
the County of London Esquire 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 has for its object to provide a simple and efficient valve intended
more especially for use with pneumatic tyres but applicable also in other cases
where vessels or chambers are to be charged with fluids.
According to my Invention the main body of the valve is filled with or contains
rubber or other suitable resilient material (which I will refer to as "rubber") in
such a way that when the valve is closed and the rubber is compressed it makes an
air-tight joint between itself and the surfaces in the interior of the valve casing
outward or the valve proper so that air cannot leak out.
The accompanying drawing represents a valve constructed in accordance with
my Invention Figure 1 being a vertical section with the valve proper open.
Figure 2 is a vertical section with the valve proper closed. Figure 3 is a side
elevation. Figure 4 is a transverse section on the line 1-2. Figure 1 and
Figure 5 shews a part of the valve casing and stem in vertical section and cross
section.
The valve illustrated is for application to a pneumatic tyre for example and from
the description of this its general application will also be understood.
The body of the valve casing a is made with a head a at its inward end between
which and a plate a³ which bears against the interior of the rim of the velocipede
the material of the air chamber around the margin of the orifice through which the
said head a protrudes is gripped.
The said casing a can be of the usual shape in cross section and is screwed
externally and the said plate a3 which is provided with an orifice corresponding in
shape to the casing a is secured in position by a nut a screwed onto the said
casing a and bearing on the plate a³ and a nut a screws also onto the said casing a
to bear on the rim to secure the casing to the rim. The foregoing parts are, or
may be, like those used in ordinary valves, for pneumatic tyres.
Upon the upper part of the said casing a is screwed a cap c having a space in it
above the top of the casing a in. which is placed a washer or filling of rubber
which in the drawing is shewn as forming part of the rubber tube d by which
the closure of the valve against outward leakage is prevented as hereinafter
described.
Projecting from the inner side of the said cap c is a tubular piece e which carries
the tubular piece of rubber d filling in the space between the inside of the casing a
and the central valve spindle f except a space between the said spindle and the
interior of the rubber tubular piece sufficient to allow of the passage of air in
inflating the tyre-as shewn in Figure 1. The valve proper on its outward face
which bears against the inward end of the said tubular rubber piece d is preferably
made of a partly flattened part at få and a partly domed or coned part so as to
give an effective closure of the valve when the rubber is distorted as shewn in

page_text: Figure 2. The two projections f* of the part f by bearing on the shoulder a6 of
the casing a prevents the air passage from being blocked during the effective
stroke of the inflator, the air then passing between the shoulder a and that part
of f which is held away from it by the projections f. Below the valve is a
continuation of the valve spindle which is squared or equivalently formed and
which engages in a correspondingly formed opening in the head of the valve
casing so as to prevent the valve from turning but so as also to leave a way for the
inlet of air. The valve may be pressed outwards by a spring which can conveniently
be a coiled spring beneath the valve but this is not essential and such a spring is
not shewn in the arrangement illustrated. The valve stem is screwed at its outer
end to receive a dust cap g by tightening which the valve is drawn up and the
rubber tubular piece d'and the washer aforesaid or upper part thereof are
compressed so as to give a very secure closure against the surfaces of the casing a
of the parts f3f below and the coned surfaces of the part e and top of the casing a
as shewn in Figure 2 by which the air is prevented most effectually from leaking
outwards.
The rubber at the top of the tubular piece & may be made as a separate washer
i desired but it is preferred to make the rubber all in one piece as shewn, as then,
it can be made as a simple tube with its lower end bearing on the part f and its
upper part confined in a groove in the part e as shewn clearly in the drawings.
When the valve is to be employed for inflating the tyre the dust cap g is
removed and the pump is screwed on at hand the parts being in the position
Figure 1 air passes in between the spindle f and rubber tube d and out from the
lower end thereof past the valve proper and between the lower part of the stem f
anu lower part of the passage through the casing a and into the tyre. The air
pressure inside the tyre eventually presses upon the part f and forces the rubber d
towards the position shewn in Figure 2 and then by putting on the dust cap g
and screwing it home the spindle f is drawn up and forces the rubber tube into
close contact with the internal wall of the casing a and its lower and upper ends are
forcibly compressed between the parts ff and the coned top of the casing a and
the coned surface of the part e as clearly shewn in Figure 2.
I have described the valve as applied to a pneumatic tyre but it will be under-
stood that it may be applied to other vessels or chambers in an analogous manner.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed I declare that what I
claim is:-
1. In valves for the purposes described a tube of rubber or equivalent material
arranged so that when the valve is closed it is compressed between the internal
surfaces in the valve casing outward of the valve proper substantially as herein-
before described.
2. In a valve for the purposes specified the combination with a rubber or
equivalent tube of a spindle such as f passing through it and having a domed or
coned part such as f³ substantially as hereinbefore described with reference to the
accompanying drawings.
3. A valve for the purposes mentioned arranged or constructed substantially as
hereinbefore described and illustrated in the accompanying drawings.
Dated this (ith day of August 1897
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.