provements in Valves for Pneumatic Tyres.
Year: 1896

page_text: PROVISIONAL SPECIFICATION
Improvements in Valves for Pneumatic Tyres.
I, JOHN TOWNSEND TRENCH of Kenmare, County Kerry, Ireland, Land Agent,
do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved construction of valve for pneumatic tyres
According to my invention the body of the valve is made of a T-shape, the
vertical part being adapted to pass through the wall or base of the tyre and through
the wheel rim and is fixed thereto by a lock nut in the usual manner, the joint
between the said vertical part of the body and the wall of the tyre being made air
tight in any suitable manner.
In one end of the horizontal part of the T-shaped body is formed a seating for
the valve which may be either coned or flat, but preferably faced with leather
rubber or like material. The valve is shaped to adapt it, to fit on the seating and
it is provided with a stem which is guided in a suitable manner in the horizontal
part of the body and is kept on its seating by a suitable spring.
In the vertical part of the body is mounted a spindle terminating in the hori-
zontal part thereof in a head of an excentric or D-shape which on being rotated
acts on the end of the stem of the valve and lifts the valve from its seating and
thus provides a means of allowing the air to escape through the valve when it is
desired to deflate the tyre.
The extremity of the vertical part of the body is closed by a screw cap the head
of which is shaped to form a key socket and the end of the spindle actuating the
valve is shaped to fit the said key socket so that the cap when removed from the
end of the vertical part of the body can be utilized for actuating the spindle for
lifting the valve from its seating.
I, JOHN TOWNSEND TRENCH of Kenmare County Kerry Ireland, Land Agent,
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:-
This invention relates to an improved construction of valve for pneumatic tyres.

page_text: In the accompanying drawing which illustrates this invention:-
Figure 1 is a view in sectional elevation.
Figure 2 is a view in plan, and
Figure 3 is a view in sectional elevation showing an alternative construction.
Throughout the views similar parts are marked with like letters of reference.
The body of the valve is made of a T-shape, the horizontal part A being adapted
to lie within the tyre and the vertical part A to pass through the wall or base X of
the tyre and through the wheel rim Y to which it may if desired be fixed by a
lock nut Z as shown by Figure 1.
In one end of the horizontal part A of the T-shaped body is formed a seating a
for the valve B which may be either coned or flat, but preferably either faced with
or engaging with a facing of leather, rubber, or like material. The valve B is
provided with a stem b which is guided in a suitable manner, and it is kept on its
seating by a suitable spring such as C.
To lift the valve B from its seating a for the purpose of deflation a longitudinal
movement is imparted to its stem 7 by means of mechanism operating through, the
vertical part A of the body of the valve." The mechanism shown in Figure 3.
consists of a spindle D so mounted in the vertical part A' as to ve capable of being
rotated therein, and carrying at its upper end-within the horizontal part A of
the body of the valve-a head d of an excentric or D-shape. This head engages
with a projection on the stem 6 of the valve and thus lifts it from, its seating.
If desired a second projection 62 may be provided to enable the valve B to be locked
down on its seating through the medium of the spindle D.
The extremity of the vertical part A¹ of the body of the valve is threaded to
receive the inflator and is closed by a screw cap E the head of which is shaped to
term a key socket e, and the lower end d' of the spindle D is shaped to fit the said
key socket, so that the cap E when removed from the body of the valve can be
utilised for rotating the spindle.
In the construction shown by Figure 1 the upper end of the spindle D carries an
inclined plane engaging with the stem 6 of the valve so that when the spindle D
is pushed upwards it imparts a longitudinal movement to the stem of the valve
and thus lifts the valve from its seating.
In cases where it is not necessary to deflate through the valve the spindle D
and the mechanism for operating the valve spindle can be dispensed with.
An air tight joint between the body of the valve and the tyre is ensured by
means of a winged nut such as F. threaded on the vertical part, A' of the body of
the valve and bearing against the outer surface of the tyre as shown. To prevent
the tyre spreading under the pressure of the lock nut F a winged flange such as a¹
may be made on the underside of the horizontal part A of the body of the valve to
engage with and bed in the inner surface of the tyre as shown in Figure 3.
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. The improved valve for pneumatic tyres constructed arranged and adapted
to operate, as herein specified.
2. A valve for pneumatic tyres consisting of an horizontally arranged part
adapted to lie within the tyre, and a vertical part adapted to pass through the
tyre and wheel rim, as set forth.
3.tA valve for pneumatic tyres consisting of an horizontally arranged part
adapted to lie within the tyre and to carry the valve proper, of a vertical part
adapted to pass through the tyre ana wheel rim and to receive the nozzle of the
ii.flator, and of means for lifting the valve from its seat, as set forth.
4. A valve for pneumatic tyres consisting of an horizontally arranged part
Edapted to lie within the tyre and to carry the valve proper, of a vertical part
adapted to pass through the tyre and wheel rim and to receive the nozzle of the

page_text: inflator, and of means for lifting the valve from its seat, and also of locking it
down thereon, as set forth.
5. A valve for pneumatic tyres consisting of a T-shaped body carrying a valve
in its horizontal part and a spindle for operating the said valve in its vertical part,
as set forth.
Dated this
day or August 1897.
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.