Improvements in Valves for Pneumatic Tyres.
Year: 1894

page_text: Date of Application, 31st May, 1894
Complete Specification Left, 1st Feb., 1895-Accepted, 9th Mar., 1895
PROVISIONAL SPECIFICATION.
Improvements in Valves for Pneumatic Tyres.
We, HARRY LUCAS, of Tom Bowling Lamp Works, Little King Street, in the
City of Birmingham, Lamp Manufacturer, and WILLIAM STARLEY, of St. John's
Works, Coventry, in the County of Warwick, Cycle Manufacturer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in the valves employed for attachment to
the pneumatic tyres of cycles, or other vehicle wheels. The object of our invention
is to construct a valve and fittings of few and simple parts and in such a manner
that the lift or movement of the valve may be readily controlled, and the valve
itself firmly held down to its seat when required, without the inconvenience arising
from the projecting screwed stem ordinarily employed for such purposes.
In carrying our invention into effect we construct the body of our improved
valve of brass or other metal, and cut or form a screw thread upon the exterior
At the upper
surface of the same for the reception of the usual clamping nuts.
end of the body, or that end inserted within the tyre, we forin a flange or head with
a screw thread cut or formed upon its exterior surface, and having its interior cut
or hollowed out to receive the head of the valve. The valve is of the mushroom
or other shape or type, and has a stalk or stem which extends within the hole
formed throughout the central part of the valve body. The valve stalk or stem is
bored or hollowed out for the greater part of its length, and tapped or screw
threaded, to receive the screw stud or pin formed upon, or attached to, the loose
cap covering the outer end of the valve body to which the pump or inflator is
attached.
We form the valve seating within the hollow head of the valve body, herein-
before described, placing a ring of leather, gutta-percha, or other material upon
the seating, or beneath the head of the valve, to assist in preventing the escape of
air from the tyre.
We control the extent of the valve lift or movement by means
of a perforated cap suitably formed for screwing upon the thread cut upon the
exterior surface of the valve body head, as herein before described.
The pump or inflator is attached to the outer end of the valve body, and when
the tyre
inflated to the desired pressure, and the pump removed, the loose cap is
placed over the outer end and its stud or pin screwed within the hollow stalk of the
valve hereinbefore described. By screwing up tightly, the valve is drawn closely
on to its seat, and the escape of air from the tyre effectually prevented. The tyre
may be readily deflated if desired, by slightly unscrewing the cap, and then by
pressing the same to lift the valve off its seat, thus allowing the air to escape past.
the stalk.
Instead of cutting or forming a thread upon the outer surface of the valve body
head, for the reception of the perforated retaining cap, we sometimes dispense with
the cap, and control the lift of the valve by spinning or beading over the metal
forming the head, after the valve is in position. We also make other modifications
in our improved valve and in the parts pertaining thereto, and in the method of

page_text: attachment to the tyre, without departing from the essential features of our
invention.
Dated this 30th day of May 1894.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicants.
We, HARRY LUCAS, of Tom Bowling Lamp Works, Little King Street, in the
City of Birmingham, Lamp Manufacturer, and WILLIAM STARLEY, of St. John's
Works, Coventry, in the County of Warwick, Cycle Manufacturer, 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 improvements in the valves employed for attachment to
the pneumatic tyres of cycles, or other vehicle wheels. The object of our invention
is to construct a valve and fittings of few and simple parts and in such a manner
that the lift or movement of the valve may be readily controlled, and the valve
itself firmly held down to its seat when required, without the inconvenience
arising from the projection of a screwed stem or like part beyond the outer end of
the valve body.
In the accompanying sheet of explanatory drawings to be hereinafter
referred to-
Figure 1 is a front elevation and Figure 2 an enlarged sectional elevation
illustrating the general form and arrangement of our complete valve.
Figure 3 is an elevation and Figure 4 a plan of the valve alone without the valve
body or other parts.
Figures 5, 6 and 7 illustrate a modified form of the valve and its seating.
Figures 8 and 9 represent the valve retaining cap.
Figure 10 is a front elevation of the valve body.
The same reference letters in the different views indicate the same parts.
In carrying our invention into effect we construct the body A of our improved
valve of brass or other metal, and cut or form a screw thread upon the exterior
surface of the same for the reception of the usual clamping nuts.
At the upper
end of the body, or that end inserted within the tyre, we form a flange or head A
with a screw thread cut or formed preferably upon its exterior surface, and having
its interior cut or hollowed out to receive the head of the valve B. The valve Bis
of the mushroom or other shape or type, and has a stalk or stem which extends
within the hole formed throughout the central part of the valve body but does not
project beyond the outer end of the same. The valve stalk or stem is bored or
hollowed out as shown at Figure 2, and tapped or screw threaded, to receive the
screw stud or pin C formed upon, or attached to, the loose cap D covering the
outer end of the valve body to which the pump or inflator is attached.
We form the valve seating within the hollow head of the valve body, herein-
before described, placing a ring or washer E of leather, gutta-percha, or other
material upon the seating, to assist in preventing the escape of air from the tyre.
We control the extent of the valve lift or movement by means of a perforated
cap F suitably formed for screwing upon the thread cut upon the exterior surface
of the valve body head, as herein before described. The leather or other washer Ę
is kept in position upon its seating by means of the interposed metallic ring G
beneath the retaining cap F.

page_text: Instead of placing the leather or other packing ring or washer upon the valve-
seating as illustrated at Figure 2, we sometimes fix the packing upon the valve
itself as illustrated at Figures 5, 6, and 7. The leather or other packing is placed
under the head of the valve and the projection E' is then spun over to keep it in:
position.
In place of such projecting piece E' we sometimes provide a small screw cap to.
be screwed on to the valve head for the purpose of securing the packing.
To keep the valve from turning or revolving when being screwed down to or
released from its seating we form a slot or groove preferably in the valve head for
engaging with a snug or projection, formed with or attached to the head of the
valve body as illustrated at Figure 7.
The pump or inflator is attached to the outer end of the valve body, and when
the tyre is inflated to the desired pressure, and the pump removed, the loose cap D
is placed over the outer end its stud or pin C screwed within the hollow stalk of
the valve B hereinhefore described. By screwing up tightly, the valve is drawn.
closely on to its seat, and the escape of air from the tyre effectually prevented.
The tyre may be readily deflated if desired, by slightly unscrewing the cap D, and
then by pressing the same to lift the valve off its seat, thus allowing the air to.
escape past the stalk.
We sometimes cut or form the screw thread upon the exterior surface of a solid
valve stalk or stem, and bore out the pin or stud attached to the loose cap C and
form an internal thread within the same enabling it to be screwed on to the valve.
stalk or stem.
Instead of cutting or forming a thread upon the outer surface of the valve body
head, for the reception of the perforated retaining cap, we sometimes control the
lift of the valve by spinning or beading over the metal forming the head, after the
valve is in position. We also make other modifications in our improved valve and
in the parts pertaining thereto, and in the method of attachment to the tyre, without
departing from the essential features of our invention.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The method of securing a pneumatic tyre valve upon its seating by means of
a screwed valve stem entirely enclosed by the valve body, and a stud or pin formed
with or attached to the outer cap or covering of such body and arranged for screwing
within or upon the stem, substantially as herein described.
2. In pneumatic tyre valves the method of controlling the lift of the valve by
means of a perforated cap screwed to or formed with the head of the valve body
substantially as herein described.
3. In pneumatic tyre valves the method of securing the leather washer or other
packing material to the valve seating by means of a metallic ring interposed between
the upper surface of the packing and the underside of the valve retaining cap,.
substantially as hereinbefore described and as illustrated in the accompanying
drawings.
4. The construction of a pneumatic tyre valve having a stem or stalk suitably
screwed for receiving a corresponding pin or stud formed with or attached to the
outer cap or covering of the valve body, and a head which is locked or kept from
revolving by a snug or projection and has a leather washer or other packing
material secured immediately beneath it in a manner substantially as hereinbefore
described and as illustrated in the accompanying drawings.
5. The construction of a cap or covering for the outer end of a pneumatic valve
body, having an externally or internally threaded screw stud or pin formed with or
rigidly attached thereto, substantially as and for the purposes herein before described
and as illustrated in the accompanying drawings.
6. The combination with a pneumatic tyre valve seating upon or within the
inuer end of a valve body and having a screwed stalk or stem entirely enclosed by

page_text: such body, of a correspondingly screwed stud or pin formed with or rigidly attached
to the outer cap or casing, substantially as and for the purposes hereinbefore
described and as illustrated in the accompanying drawings.
Duted this 31st day of January 1895.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicants.