Improvements in Valves for Pneumatic Tyres and other purposes.
Year: 1897

page_text: Date of Application, 23rd Mar.,
Complete Specification Inft 11th Oct 1007
1897
Annonind
DAIL Fah
1000
PROVISIONAL SPECIFICATION.
Improvements in Valves for Pneumatic Tyres and other purposes.
I, THOMAS HARRISON, of Countess Avenue, Whitley, in the County of North-
umberland, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to valves for pneumatic tyres and other purposes and more
particularly to that kind of valve wherein two stop valves and one non return
valve are employed the former being carried at either end of an apertured tube
within an outer casing and controlling an inner passage to the air tube and an
outer passage to the atmosphere the non return valve being carried within the
inner tube and controlling the admission of air from the inflator.
According to my present invention the same number and kind of valves are
employed but the non-return valve is in the form of a ball valve of suitable
material and arranged in a chamber or space formed in the end of the valve
casing nearest the air tube and has its seat at and controls the inner end of a
passage leading outwardly therefrom. The said chamber communicates with the
air tube by apertures arranged centrally or otherwise suitably and a projecting
spindle or part of the valve casing is adapted to come about the inner central part
of and form a guide for keeping the balf in position for action allowing it to rise
only a short distance from its seat so that the ball by reason of the entering air
under pressure on inflation revolves or vibrates in the space between its seat and the
projecting spindle or part of the casing and will always find its seat on the back-
stroke of the inflator or withdrawal of external pressure in whatever position the
valve may be at the time.
The stop valve carried upon the inner end of an inner tube or casing of less
diameter than the interior of the outer casing has its seat at the outer end of the
passage from the ball valve and carries a pin or projecting part adapted to raise.
the ball valve from its seat when partially or wholly shut or screwed up. The
outer stop valve is arranged as before and may be formed by a reduced part of
the inner tube having its seat upon a washer of vulcanite or suitable material
carried upon, or a suitably formed part of, an external nut or the casing, the
reduced part of the inner tube passing outward and formed for reception of the
inflator.
When it is desired to inflate a tyre fitted with a valve of the kind above
described the external nut or part is unscrewed allowing the inner stop valve
to open and the non-return valve to come upon its seat, and shutting the outer
stop valve, on application of the inflator the air entering the inner tube passes
out through apertures formed therein to the space between it and the outer
casing thence past the inner stop valve and non-return valve to the air-tube.
When the tyre is inflated the stop valve may be screwed up tight or the non-
return valve alone may be relied upon to keep the air pressure within the tyre,
one great advantage of this arrangement being, that, should the outer part and
inflation nozzle of the valve be lost or stolen the air pressure is still preserved and

page_text: the machine cas be used as usual, and the user may for the purpose of inflation
use the external nut and inflation nozzle of many of the other valves at present
in use the external screwed part being slightly tapered or otherwise suitably
formed for the use of varying sizes of caps or nuts.
To deflate the tyre the outer cap is partly unscrewed partially opening the
inner stop valve and the non-return valve not being able to gain its seat by
reason of the pin or projection upon the inner stop valve the air passes outwards
into the space between the inner tube and outer casing and thence to the inner
tube through the apertures in its walls to the atmosphere by the inflation passage.
By a modification I may arrange a ball or non-return valve of the kind above
described within the inner tube or casing and which by its special construction
and arrangement and the internal pressure will always find its seat on the back
stroke of the inflator whether the valve projects in an upward, downward or other
direction during inflation of the tyre.
, 1
00
1 1
JEJ
1 1007
Improvements in Valves for Pneumatic Tyres and other purposes.
I, THOMAS HARRISON, of Countess Avenue, Whitley, in the County of North-
umberland, 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 for pneumatic tyres and other purposes and more
particularly to that kind of valve described in my previous Patent No. 5605 A.D.
1897 wherein two stop valves and one non return valve are employed, the former
being carried at either end of an apertured tube, within an outer casing and con-
trolling an inner passage to the air tube and an outer passage to the atmosphere
the non-return valve being carried within the inner tube and controlling the
admission of air from the inflator.
According to my present invention the same number and kind of valves are
employed and I will describe the same in reference to the accompanying drawings
in which Figure 1 is a sectional elevation of one form of valve and Figure 2 a
similar view of a modified arrangement.
Referring to Figure 1 A is the valve casing and a the usual means for securing
the valve to the tyre. R₁ is the non-return valve in the form of a ball valve
of suitable material and arranged in a chamber or space I) formed in the end of
casing A nearest the air tube and seated at q controlling the inner end of
passage P3 leading outwardly therefrom. The said chamber communicates with
the air tube by apertures dd arranged centrally as shown, or otherwise con-
veniently. A projecting spindle C screwed into the upper part of the chamber 1)
as shown, or it may be a part of the valve casing itself, is adapted to come about
the inner central part of and form a guide for keeping the valve R¹ in position
for action, allowing it to rise only a short distance from its seat so that the ball R¹
by reason of the. entering air under pressure on inflation revolves or vibrates in
the space between its seat and the projecting spindle C the latter having a clear
air space all round its free end c and the ball valve R! will thus always find its
seat on the backstroke of the inflator or withdrawal of external pressure in what-
ever position the valve may be at the time.

page_text: The stop valve V carried upon the inner end of an inner tube or part T has its
seat at the outer end of the passage P3 from the ball valve and carries a pin or
projecting part y adapted to raise the ball valve R¹ from its seat when partially
or wholly screwed up tight as will be readily seen from the figure.
The outer stop valve S is arranged as before and may be formed by a reduced
part of the tube T having its seat on a washer W of vulcanite or other suitable
material, carried by an external nut N or the casing. A washer V may also be
provided for the valve V. The reduced part t of the tube T passes outwards and
is screwed or otherwise formed as at t¹ for reception of the inflator and provided
with a fixed nut N' for adjustment of the valves.
When it is desired to inflate a tyre fitted with a valve of the kind above
described the external nut N is operated to unscrew the part t allowing the inner
stop valve V to open and the non-return valve R¹ to come upon its seat at the
same time shutting the outer stop valve S, the parts then being in the positions
shown in Fig. 1. On application of the inflator the air entering the inner tube T
passes out through apertures 6 therein to the space a¹ between tube T and the
outer casing A thence past stop valve V and non-return valve R¹ to the air tube
by the chamber D and passages d.
When the tyre is inflated the stop valve V may be screwed up tight or the non-
return valve R' alone may be relied upon to keep the air pressure within the tyre:
one great advantage of this arrangement of valve is that should the outer part N
and inflation nozzle t, t', of the valve be lost or stolen the air pressure is still pre-
served and the cycle can be used as usual, and the user may for the purpose of
inflation use the external screwed nut and inflation nozzle of many of the other
valves at present in use the external screwed part a² being slightly tapered (not
shown in the fig.) or otherwise suitably formed for reception of varying sizes of
caps or nuts.
To deflate the tyre the outer nut N¹ is operated to partly unscrew the part t thereby
opening the inner stop valve, and the non-return valve R¹ not being able to gain
its seat by reason of the pin or projection y upon the inner stop valve V the air
passes outwards into the space a thence through apertures 6 to the inner tube T
and out by the inflation passage p.
By a modification I may arrange a ball or non-return valve of the kind above
described within the inner tube or casing T as shown in Fig. the operation and
arrangement of the other parts being as shown in the drawing and in my previous
Patent No. 5,605, A.D). 1897; that is to say the valve V carried upon the inner
end of the tube T (and it may be formed in one with the spindle C) is seated
on a washer VI and controls the inner passage P³ to the air tube.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. A valve for pneumatic tyres and other purposes comprising three valves two
stop valves and one non-return valve the latter controlling an inner passage to
the air tube and arranged for deflation by a projection upon the inner stop valve
which latter controls a passage to the ball valve and air tube the other stop valve
controlling an outer passage to the atmosphere substantially as set forth.
2. In valves for pneumatic tyres and other purposes the combination of an inner
tube or part carrying a stop valve with a projecting pin or part at its inner end
and having a reduced part forming an outer stop valve and an extension for
receiving the inflator and a ball non-return valve arranged in a chamber beyond
the inner stop valve and having a projecting guide or spindle, suitable air passages
being provided substantially in the manner and for the purposes set forth."
3. In valves for pneumatic tyres and other purposes a ball non-return valve
arranged in a chamber and provided with a guide consisting of a projecting
spindle or part of the chamber or casing having a free air space around its free

page_text: end, of less diameter than the ball, and arranged to come about the inner central
part of the latter substantially in the manner set forth.
4. A valve for pneumatic tyres and other purposes comprising the combination
of parts constructed arranged and adapted for operation substantially as described
in reference to Figure 1 of the drawings.
5. A valve for pneumatic tyres and other purposes comprising the combination
of parts constructed arranged and adapted for operation substantially as described
in reference to Figure 2 of the drawings.
Dated this 13th day of October 1897.
For the Applicant,
PRYOR & HARVEY,
Agents, 3, St. Nicholas' Buildings, Newcastle-on-Tyne.