Improved Valve for Inflating and Deflating Pneumatio Tyres and for analogous purposes.
Year: 1896

page_text: Date of Application, 27th Aug., 1896
Complete Specification Left, 27th May, 1897-Accepted, 17th July, 1897
PROVISIONAL SPECIFICATION.
Improved Valve for Inflating and Deflating Pneumatio Tyres and
for analogous purposes.
We, EDWIN DAWSON, of 72 Lynn Road, Buckland, Engineer, HENRY RODOLPHUS
VAN COOTEN, Engineer, of 23 Fawcett Road, and FREDERICK JEREMIAH BATES, of
19 Agincourt Road, Engineer, all in the Borough of Portsmouth, South Ilants,
do hereby declare the nature of this invention to be as follows:-
Our invention is designed so as to provide a simple and effective non-return valve
for use in inflating and deflating pneumatic tyres and other articles or air reservoirs
to which such a valve could be attached by the means hereafter described, or by other
ordinary and applicable means.
The valve which is the subject of this invention consists of a short metallic tube,
terminating at its lower extremity in the usual mushroom head for insertion into the
rubber or other material of which the air tube or chamber is composed.
The interior of the metallic tube, which, with the head, we shall designate the
body of the valve, is bored out to a uniform diameter sufficiently to allow free play to
a helically coiled spring to be contained therein, as hereafter described.; and an orifice
of smaller diameter, but sufficient to prevent the said spring from falling through, is
provided in the mushroom head for the passage of air into the air tube or chamber.
At the upper portion, and for a short distance from the top, we provide an internally
screwed thread in the body of the valve, into which screws a small externally
threaded cylindrical block, having a small central bore for the passage of air. Said
bore or aperture is enlarged at its lower end so as to form a seating for an india
rubber or other suitable ball, the action of which is that of a non-return valve. On
the upper face of this block, which we call the valve seating, we may sink a small
hole on each side of the central bore, but only partially into the thickness, for
receiving a pair of studs or projections formed on the top of the cap hereafter
described, which form a key for removing and screwing up the valve seating
aforesaid.
The body of the valve is externally screwed for taking the securing nuts, and for
receiving a metallic cap or cover, which is correspondingly internally screwed and
provided with the two studs or projections before mentioned, so that when said cap is
removed, it may be reversed and used as a key for removing or replacing the valve
scating when required. The interior of the cap is preferably provided with a leather
or like washer for ensuring absolute air tightness.
Within the body, beneath the valve seating, we place a helical spring partly
surrounding a spindle carrying a head or dish on which rests a loose ball of rubber or
other desirable material, the latter being kept normally up to the seating, but capable
of being forced therefroin by the force of the air from the pump or equivalent during
inflation. The lower part of the body of the valve, just above the mushroom head,
may be slightly undercut so as to allow the rubber or equivalent. material of the air
tube or chamber to enter and form an air tight joint. The valve seating may likewise
be undercut for a similar purpose,

page_text: The deflation of the air tube or chamber may be effected by means of the key as
already mentioned, but we may, if preferred, bore a small hole or passage through
the cap, when a pin, match, or wire can be inserted without removing the cap. This
plan may be carried ont further by employing a permanent spindle in the cap, having
a retaining disc or collar near its inner extremity, and arranged to bear against the
ball when depressed, and thus allow a passage of escape for the air. Care must. be
taken to see that the hole or passage in the cap (as well as in the block or seating) is
drilled large enough to allow the air to pass by the spindle; and the leather
washer must contain a centrul hole, say, abont twice the diaineter of the spindle, so
that it may not become compressed against the latter.
In connection with a wheel rim, the valve may be secured in the usual manner,
that is to say, the head is inserted into the air tube or chamber and then a plate or
washer passed over. We prefer, however, to make the latter with a central hole of
greater diameter than usual, and we also bend up or undercut the mushroom head,
and by this means, the rubber or equivalent of the air tube or chamber will be well
pressed partly into the hole in the plate or washer and partly into the undercut
portion of the body aforesaid.
The air tube is then placed in or upon.the rim of the wheel, and the valve passed
through the hole in the same. The usual pair of securing nuts are employed, and
after inflation, the cap is screwed on for keeping out dust or the like from the
interior of the valve.
Dated this 24th day of August 1896.
STANLEY, POPPLEWELL & Co.,
Agents for the Applicants.
Improved Valve for Inflating and Deflating Pneumatic Tyres and
for analogous purposes.
We, EDWIN DAWSON, of 72 Lynn Road, Buckland, Engineer, HENRY RODOLPHUS
VAN COOTEN, Engineer, of 23 Fawcett Road, and FREDERICK JEREMIAH BATES, of
19 Agincourt Road, Engineer, all in the Borough of Portsmouth, South Hants, 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 :-
Our invention is designed so as to provide a simple and effective non-return valve
for use in inflating and deflating pneumatic tyres and other articles or air reservoirs
to which such a valve could be attached by the means hereinafter described or by
other ordinary and applicable means.
On the accompanying sheet of drawings are shown in Figure 1 an elevation
(enlarged) of our invention, and in Figure 2 the parts separated, being mostly in
longitudinal section.
The valve, which is the subject of this invention, consists of a short metallic tube A,
Lerininnting at its lower extremity in the usual mushroom head B, for insertion into
the rubber or other material of which the air tube or chamber is composed.
The interior of the metallic tube, which, with the head, we shall hereinafter
designate the body of the valve, is bored out to a uniform diameter sufficiently to
allow free play to a helically coiled spring A' to be contained therein, as hereinafter
described; and an orifice of smaller diameter C, but of sufficient area or so shaped as
to prevent the said spring from falling through, is provided in the mushroom head B
for the passage of air into the air tube or chamber. At the upper portion and for a
short distance from the top, we provide an internally screwed thread, in the body of
the valve as shown by C, into which screws a small externally threaded cylindrical

page_text: block D,having a small central bore E for the passage of air. Said bore or aperture E
is enlarged at its lower end as at F', so as to form a seating for an india-rubber or
other suitable ball G, the action of which is that of a non-return valve. On the
upper face of this block D we may sink a small hole on each side of the central bore
as at J J, but only partially into the thickness, for receiving a pair of studs or
projections N N, formed on, or otherwise attached to the top of the cap P hereinafter
described, which form a key for removing and screwing up the valve seating at F
aforesaid.
The body of the valve is externally screwed as at K, for receiving the socuring
uuts T. I, and also for taking a metallie cap or cover M which itself is correspondingly
internally screwed throughout a portion of its length, the remainder being reduced
internally to a small tubular passage M. The outside of this cap M is also preferably
reduced in diameter and externally threaded as shown by O, in order to take a small
dust proof cap P, and also to receive the screwed ond of the inflator when necessary,
said cap P meanwhile remaining suspended by a chain P passing round the neck
thereof and also around the cap M. The chain may be made to pass around one of the
spokes of the wheel, by means of a loop, thus preventing the fiability of the cap M
becoming lost when removed for any purpose. We also provide the cap P with two
studs or projections N N as before mentioned, so that it may when removed be
reversed and used as a key for adjusting, removing or replacing the valve seating
when required, and said cap may contain a leather or like washer O for ensuring
absolute air tightness.
In some cases, we may find it sufficient to dispense with the cap P, and employ the
cup M as a closed cap or cover, the studs or projections N N being attached thereto
as in the case of the cap P.
Within the body, beneath the valve seating, we place a helical spring A
surrounding a spindle R carrying a head or dish, on which rests the loose ball G
aforesaid of rubber or other desirable inaterial, the latter being kept normally up to
the seating, but capable of being forced therefrom by the force of the air from the
pump or equivalent during inflation. Upon the opposite side of the ball (t, there
may also be another spindle R' extending a little distance beyond the end of the
body of the valve, resting normally within, and being slightly smaller thau, the
bore E of the block D aforesaid. The lower part of the body of the valve, just above
the mushroom head, inay be slightly undercut as at S, so as to allow the rubber or
equivalent material of the air tube or chamber to enter and form an air tight joint.
The valve seating may likewise be undercut for a similar purpose.
The deflation of the air tube or chamber may be effected by means of the key, as
already mentioned, or we may unscrew and remove the cap M and press the spindle R'
which will bear against the ball G when depressed, and thus allow a passage of
escape for the air. Care must be taken to see that the hole or passage in the cap M
(as well as in the block or seating) is drilled large enough to allow the air to pass by
the spindle.
The valve may be secured to the wheel rim in the usual manner, that is to say, the
head is inserted into the air tabe or chamber and then a plate or washer W passed
We prefer, however, to make the latter with a central hole of greater
diameter than usual, and we also bend or undercut the mushroom head, and
by this means the rubber or equivalent of the air tube or chamber will be
well pressed partly into the hole in the plate or washer and partly into the undercut
portion of the body aforesaid.
The air tube is then placed in or upon the rim of the wheel, and the valve passod
through the hole in the same. The usual pair of securing nuts is employed, and
after inflation, the cap P is screwed on for keeping out dust or the like from the
interior of the valve.
It is obvious that we may, if preferred, dispense with the spindle R', when it will
be necessary to insert a match or wire or soine such device into the opening E in
order to force the ball G from its seating and thus open the valve.
In conclusion we would have it known that we do not wish to limit the scope of

page_text: our present invention to the precise details such as described and illustrated herein'
but may employ any other devices which are merely equivalents of such details.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that
what we claim is :-
1. In valves for inflating and deflating pneumatic tyres aud for analogous purposes
the employment of a spring controlled independent ball such as G in combination
with a suitable seating within the body of the valve the whole forming a non-return
valve, substantially in the manner hereinbefore described and as illustrated by the
accompanying drawings.
2. A valve for inflating and deflating pneumatic tyres and for analogous purposes
consisting of a hollow tube or body containing a ball of india-rubber or any other
suitable material together with a helical spring and a spindle or spindles in
combination with a hollow block forming a seating for said ball adjustable or
removable by means of projections or studs upon the dust cap fitting within
corresponding holes in said hollow block whereby the latter inay be turned,
substantially in the manner herein before described, and as illustrated by the
accompanying drawings.
3. The improved valve for inflating and deflating pueumatic tyres and for
analogous purposes, substantially as hereinbefore described and with reference to the
accompanying drawings.