Improvements in Valves.
Year: 1898

page_text: Improvements in Valves.
J, TIMOTHY SHEPHERD, of Kenilworth, Oakfield Road, Birmingham, in the County
of Warwick, Engineer, do hereby declare the nature of this invention to be as
follows
My invention relates to valves, and more especially to valves of that kind or class
intended for use with pneumatic or air tyres, and my said invention comprises an
improved valve which admits of the tyre being removed from the rim or felloe of the
wheel without having to disconnect the valve parts in any way, or break the air tight
joint, as has now to be done with valves as usually constructed. My said invention
comprises moreover various other improvements hereinafter set forth.
According to my said invention I form a stem preferably of aluminium or other
light metal, which stem is externally screw-threaded, and is bored out to within a
suitable distance from the head to receive a small spiral or other spring, and a small
perforation or air passage is provided in the wall at that end of the said stem carrying
the mushroom or other suitably shaped head. The outer or opposite end of the said
bore is internally screw-threaded for a suitable distance to receive a correspondingly
serew-threaded part of the head. This head is provided with a central or axial hole
right through the same, that end of the said hole opening into the bore in the
stem being coned out or enlarged to form a seat for the air plug or valve, which latter
is preferably formed of some soft metal, such as lead, or the like, and may be covered
with valve tubing or other suitable material or substance to ensure its forming a
perfectly air tight joint with the seat. The air plug or valve is provided, moreover,
with a long thin stem arranged to project for a certain distance beyond the head, and
by which the air plug or valve can be depressed or moved away from its seating to
admit of deflation of the tyre.
It will be seen that when the head is screwed into the valve stem, into the bore of
which latter the spiral or other spring has been previously inserted, the said spring
will bear against the underside of the air plug or valve and tend to retain it upon its
seating.
A collar or shoulder is provided upon the head which when the latter is screwed
into the stem will form an air tight joint therewith, with or without the interposition
of a washer, and another collar or nut is screwed upon the screw-threaded end of the
said head a sufficient portion of which screw-threaded portion is left free to receive
the coupling of the inflator, and the dust cap. Upon the intervening portion between
these two collars I arrange a movable or sliding collar, which latter has pivoted at
opposite sides two connecting arms or links connected to the dust cap.
To inflate a tyre fitted with a valve of this description, the dust cap is first un-
screwed, the sliding collar turning upon the head to permit this operation, and when
the said cap is completely unscrewed it can be turned on one side out of the way to

page_text: admit of the inflator being affixed in the usual manner, the pressure of air from the
inflator will then push back the air plug or valve from its seating against the action of
the spiral or other spring and pass into the tyre through the bore of the stem and the
herein before mentioned air passage. Upon the action of the inflator being stopped
and the external air pressure being consequently removed the spiral or other spring
will assist in returning the air plug or valve to its seating.
.
To deflate the tyre, all that is required is to press down the long thin stem of the
air plug or valve, which as before mentioned projects through the head, so as to com-
press the spring and remove the said plug or valve from its seating until all the air
under pressure in the tyre is exhausted therefrom.
When a washer is employed to form an air tight joint between the head and the
stem of the valve the said washer inay consist of rubber fibre or the like, and a
similar washer may be likewise placed between the dust cap and the head.
An important feature of my said invention consists in forming the whole of the
head with its cap connecting arms or links and collar of a less diameter than that of
the valve stem, so that the nuts may be removed from the latter without affecting the
valve parts in any way, and consequently the tyre removed from the rim or felloe of
the wheel without deflating, or breaking any joints.
Dated this 21st day of Tonnaru 1000
A. F. SPOONER,
323, High Holborn, London, Agent for the Applicant.
Improvements in Valves.
I, TIMOTHY SHEPHERD, of Kenilworth, Oakfield Road, Birmingham, in the County
of Warwick, Engineer, 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 relates to valves, and more especially to valves of that kind intended
for use with pneumatic or air tyres, and my said invention comprises an improved
valve which admits of the tyre being removed from the rim or felloe of the
wheel without having to disconnect the valve parts in any way, or break the air
tight joint, as has now to be done with valves as usually constructed. My said
invention comprises moreover various other improvements hereinafter set forth.
In the accompanying drawings,
Figure 1 is a longitudinal section of a valve constructed in accordance with my
invention.
Figure 2 is a modification thereof, and
Figures 3, 4 and 5 are detail views of my improved dust cap.
According to my said invention I form a stem a preferably of aluminium or other
light metal, which stem is externally screw-threaded as at a¹ and is bored out as at
a² to within a suitable distance from the head to receive (in the construction
illustrated in Figure 1) a spring a³, and a small perforation or air passage at is
provided in the wall at that end of the said stem a carrying the mushroom or other
suitably shaped end. The opposite end of the said bore a² is slightly enlarged and is
internally screw-threaded as at a³ for a suitable distance to receive a correspondingly
screw-threaded part of the head b. This head is provided with a central or axial
opening, and a screw-tbread 62 to form the pump connection.
provided with a stem c¹ which has a screw-thread c² arranged to project for a certain
c is a plunger

page_text: distance beyond the head band by which the plunger can be depressed or moved
away from its seating to admit of deflation of the tyre or held to such seating as
hereinafter described.
In the construction shown in Figure 1 the spring a³, inserted previously to the
head 6 being screwed into the stem a, will bear against the underside of the plunger c
and will tend to retain it upon its seating.
d, d¹, d², d³, are rubber, leather or other suitable washers to render the joints air
tight, and f is a metal washer.
e is the dust cap bored out as at e¹ to clear the pump-thread 62 and having an internal
thread e² to engage with the one c² on the plunger stem. Figure 2 shows an ordinary
form of dust cap but I prefer to employ the novel arrangement shown in detail in
Figures 3, 4, and 5. In these figures the cap e is provided with two connecting
arms or links e pivotally connected to a collar e that is capable of sliding over the
head b. A nut e screws upon the said head and prevents the collar e from
sliding off.
is the usual plate and h and h¹ the usual nuts for securing the valve to the
inflatable tube and the wheel rim respectively.
Suitable channels j are provided in the plunger to allow of the passage of air during
inflation.
To inflate a tyre fitted with a valve of this description, the dust cap is first
unscrewed. In the case of Figures 3 to 5 the sliding collar et turns upon the head b
to permit this operation, and when the said cap is completely unscrewed it can be
turned as shown in Figure 5 on one side out of the way to admit of the inflator
being affixed in the usual manner, the pressure of air from the inflator will then push
back the plunger from its seating and air pass into the tyre through the bore of the
stein and the hereinbefore mentioned air passage. Upon the action of the inflator
being stopped, and the external air pressure being consequently removed, the
plunger will return to its seating and will be held there by the screwing on of the
cap, the collar et bearing against a stationary abutment such as the milled nut k.
To deflate the tyre, all that is required is to remove the cap and press down the
plunger stem c¹ which as before mentioned projects through the head, so as to remove
the said plunger from its seating until all the air under pressure in the tyre is
exhausted therefrom.
When a washer is employed to form an air tight joint between the head and the
stem of the valve the said washer may consist of rubber fibre or the like, and a
similar washer may be likewise placed between the dust cap and the head.
An important feature of my said invention consists, as will be seen, in forming
the whole of the bead with its cap, connecting arms or links, and collar, of a less
diameter than that of the valve stem, so that the plate 9 and nuts h, h¹ may be
removed from the latter without affecting the valve parts in any way, and
consequently the tyre removed from the rim or felloe of the wheel without breaking
any joints. Further, it will be seen that with the construction of cap illustrated in
Figures 3 to 5 the dust cap is never entirely separated from the valve and the need
for the usual chain connection to a spoke of the wheel is obviated.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. A pneumatic tyre or like valve so constructed that it can be removed from
the wheel rim without joint being broken substantially as set forth.
2. A pneumatic tyre or like valve so constructed that it can be removed from
the wheel rim and deflation can be effected without joint between the valve stem
and head being broken substantially as set forth.
3. In a pneumatic tyre or like valve a dust cap so constructed as to permit of
the attachment of the inflator without the entire removal of such cap from the
valve substantially as set forth.

page_text: 4. In a pneumatic tyre or like valve a dust cap pivoted to a collar adapted to
slide over the valve head and prevented from becoming separated from the valve by
the collar 5 or its equivalent substantially as set forth.
5. The valve constructed substantially as described with reference to the
accompanying drawings.
Dated this 21st day of October 1848
A. F. SPOONER,
323, High Holborn, London, Agent for the Applicant.
A. F. SPOONER,
323, High Holborn, London, Agent for the Applicant.