An Improved Valve.
Year: 1893

page_text: Date of Application, 21st Aug., 1893
Complete Specification Left, 21st May, 1894-Accepted, 14th July, 1894
An Improved Valve.
I, ARTHUR WILLIAM CURRY, of 24 Queen Street, Clonmel, County Tipperary,
Ireland, Mechanical Engineer, do hereby declare the nature of this invention to be
as follows:-
-
My invention relates to valves intended chiefly for controlling the inlets and
outlets of vessels containing air under pressure, although they may be applied to
vessels containing other fluids or liquids. By my valve, air or other fluid can be
allowed to pass into the vessel when forced by a pump for example or the air or
other fluid in said vessel can be allowed to escape if desired.
My said valve is particularly well adapted for use with pneumatic tyres, and in
order that the nature of my invention may be clearly understood I will describe
one construction of valve for use with such a tyre.
The body of the valve consists of two parts adapted to be screwed together, and
with a suitable washer between them to prevent leakage of air at the joint. One
part of the body is secured to the air chamber of the tyre by any suitable means
and contains the valve spindle. The valve spindle is provided on its outer end
with a leather head forming the valve proper. The other portion of the body of
the valve is tubular and at the end which screws into the first part of the valve
body the tube is made flaring or conical and is adapted to receive the leather
valve head.
When the two parts of the body are screwed together, the valve head is
continually pressed into the aforesaid conical tube by means of a suitable spring
and makes a tight joint therewith. The cavity in that portion of the valve body
which is secured to the air chamber communicates through orifices in the end
thereof with the interior of said air chamber. The outer or second part of the
valve body which contains the conical valve seat is not secured to the metal rim
but can be removed to allow of the withdrawal of the air chamber or inner tube.
The outermost portion of the tubular second part is screw-threaded to receive
the pump-nozzle which nozzle is also used for deflating when detached from the
pump to which it is screwed by a suitable coupling, the valve is kept from turning
while the pump-nozzle is being inserted therein by a small key or feather which fits
into a notch cut in the rim of the wheel.
It will be easily understood that when the two parts of the valve body are
screwed together and secured to the inner tube as above described, no air can gain
access to or escape from the interior of the air-tube of the tyre owing to the fact
that the valve head is pressed tightly against its conical seat by means of the
spring abovementioned aided by the internal air pressure when the tyre is
inflated.
The pump nozzle or connection is formed of a tube screw-threaded at its end so
as to screw into the outer part of the valve body. The part of the nozzle which
screws into the said valve body is so long that when screwed tight home the valve
The interior
pressed away from its seat and a passage opened round the same.
of the air chamber is thus connected with the tubular pump nozzle which is for
this purpose pierced with holes at the side near its inner end, the holes at the side
communicating with the tube. Air can thus be pumped into the tyre. When the
pump nozzle is unscrewed the valve returns against its seat under the influence of
the spring thus preventing escape of air from the tyre.
The deflating key used to deflate the tyre through the valve, is the pump nozzle
above described detached from the pump.

page_text: When the pump nozzle (having been detached from the pump) is screwed in, the
valve is forced away from its seat and a passage opened from the interior of the
tyre to the outside air.
I generally provide a short plug to screw into the outer part of the valve body in
the place of the pump nozzle when the valve is shut, so as to prevent the entry of
dust into the valve and as an additional preventive to the escape of air therethrough.
This dust cap has preferably some of its threads removed at the end to facilitate its
insertion into the valve body.
I have herein described my improved valve as applied to a pneumatic tyre but it
is obvious that such a valve could be used with many other vessels or chambers
which are intended to contain air or gas under pressure.
I would also have it understood that I do not confine myself to the exact
construction of valve hereinabove described, but I may alter the same considerably
in detail without departing from the nature of my invention.
I can for instance
reverse the arrangement and cause the valve to act as a safety valve by' screwing
the pump nozzle on to the valve spindle (which valve spindle can be hollow or
grooved). Should any excess of pressure occur the valve can by this arrangement
be so set as to blow until the normal pressure is restored.
Dated this 21st day of August. 1893
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
An Improved Valve.
I, ARTHUR WILLIAM CURRY, of 24 Queen Street, Clonmel, County Tipperary,
Ireland, Mechanical 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 intended chiefly for controlling the inlets and
outlets of vessels containing air under pressure although they may be applied to
vessels containing other fluids or liquids. By my valve, air or other fluid can be
allowed to pass into the vessel when forced by a pump for example or the air or
other fluid in said vessel can be allowed to escape if desired.
My said valve is particularly well adapted for use with pneumatic tyres, and in
order that my invention may be clearly understood I will proceed to describe the
same with reference to the accompanying drawings which shew valves adapted for
use with such tyres.
Figure 1 is a central section of one form of my improved valve.
Figure 2 is an elevation partly sectional of the connection which I use for
connecting said valve to the inflator.
Figure 3 is an end view of an alternative form of a portion of the valve shewn in
Figure 2.
Figure 4 is an elevation of a dust cap for use with the valve shewn in
Figure 1.
Figure 5 is a view similar to Figure 1 shewing an alternative construction of
valve.
Figure 6 is a view partly sectional of the pump connection for use therewith.
Like letters denote similar parts in all the figures.
Referring now to Figures 1 and 2 the body of the valve consists of two parts A
and A' adapted to be screwed together with a suitable washer A² interposed
between to prevent leakage at the joint.
rim of the wheel being provided with a stop or key A which prevents it turning
The part A passes through a hole in the
relatively to the rim. Said part A is secured to the air tube of the tyre by any

page_text: suitable means but preferably as shewn in the drawing. In this method of securing
the valve to the air tube the part A is made with a deep groove A³ and a piece of
sheet rubber B is tied over the end of the valve by means of a piece of rubber or
other cord which may be solutioned to the rubber as shown at B. The rubber
piece B which is provided with an orifice or orifices B² opposite the end of the
valve is solutioned to the air tube C of the tyre in which a hole is cut to allow the
end of the valve to enter said air tube.
The other part A' of the valve is formed with a deep conical seat A* adapted to
receive the leather valve head D. Said leather valve head is carried on the end of
a spindle D' which can slide in and out of a hole A in the end of the valve...
I provide a spring D2 which tends to maintain the valve head against its seat A*
and prevent air escaping from the tyre.
The pump connection shewn in Figure 2 consists of a long hollow spindle E.
secured to the pipe leading from the pump and adapted when screwed into the
part A of the valve to press the valve head D away from its conical seat A* and
thus open the valve. The hollow spindle E is provided with transverse holes E' in
the end thereof so that air can pass therethrough from the pump round the valve-
head D. The air then passes through orifices A in the end of the valve and
holes B² into the air tube of the tyre. When the pump is disconnected by screwing
out the spindle E the spring D2 acts to force the head D against its seat A' and so
closes the valve.
The spindle E when disconnected from the pump may be used to deflate the air
tube by screwing said spindle into the valve so as to open the same. The air in
the tyre then rushes out through the hollow spindle. I preferably provide a
washer E' for ensuring a tight joint between the part A¹ of the valve and the
spindle E when the tyre is being inflated.
Instead of drilling holes A in the valve I sometimes file flats D* on the end of
the spindle D' which passes through the hole A³ as clearly shown in Figure 3.
which is an end view of a spindle formed in this manner.
The air can then pass.
through the hole A by reason of the flats on the spindle.
In order to further guard against deflation of the tyre when running and to keep
dust and dirt out of the valve I provide a dust cap F shewn in Figure 4 for
screwing on the end thereof in the usual manner.
In Figure 5 I shew an alternative form of valve which differs in some particulars
from the valve shewn in Figure 1. The valve seat A is formed in the part A of
the valve and the head D is carried on a spindle D' which is secured to a tube D³.
passing through the part A' of the valve. The spring D2 is placed between the
head D and the end of the part A'. The end of the tube D³ is screw-threaded as.
shewn at D' and projects a short distance beyond the part A' and is adapted to
screw into the female screw G¹ of the pump connection G shewn in Figure 6.
The action of the valve is as follows. When the pump connection G is screwed.
on the end D' of the tube D³ the end of said connection coming against the end of
the part A¹ draws the tube D³ through said part A' and through the spindle D'
pulls the head D away from its seat A* compressing the spring D². The valve is.
now open and air can pass through the tube D³ and by the holes D³ round the
spindle D' and head D into the orifice A into the air tube of the tyre. When the
pump connection is unscrewed the valve recloses by the pressure of the spring D³..
I provide a suitable packing ring De so as to ensure the tube D' sliding air tight in
the part A of the valve.
I use also a dust cap F to prevent deflation of the valve when the tyre is.
running.
It will be noticed that the pressure of the air in the tyre is opposed to that of
the spring D² and tends to open the valve, hence if the force of the spring be
properly regulated the valve will act as a safety valve and open when the air
pressure in the tyre exceeds a certain amount so as to let the air escape.
The spring may be adjusted by means of a nut and lock nut screwed on the:

page_text: spindle D at or near the valve proper or upon the part A' and acting on the end of
the spring D'.
In a modification of this valve the spindle D' is made hollow for a portion of its
length and a transverse channel provides communication between the interior of
said spindle and the outside thereof. The air then passes through the tube D³
down the hollow spindle D' and through the transverse channel the holes D' being
dispensed with.
I have herein described my improved valve as applied to a pneumatic tyre but it
is obvious that such a valve could be used with many other vessels or chambers
which are intended to contain air or gas under pressure.
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 :-
A valve constructed substantially as described with reference to Figure 1 or to
Figure 5 of the accompanying drawings whether secured to the air tube in the
manner shewn in Figure 1 or in any other manner, and operating as specified.
Dated this 21st day of May 1894.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant..