Improvements in Valves for Pneumatic Tyres.
Year: 1894

page_text: Date of Application, 23rd Apr., 1894
Complete Specification Left, 12th June, 1894-Accepted, 14th July, 1804
Improvements in Valves for Pneumatic Tyres.
We, CAPON HEATON AND COMPANY LIMITED, and HARRY HEATON the
younger, Managing Director of the Firm of Capon, Heaton and Company Limited,
of Lifford Mills, Kings Norton, in the County of Worcester, Manufacturers, do
hereby declare the nature of this invention to be as follows:-
This invention relates to an improved valve for the air supply tube or connection
of a pneumatic tyre.
The object of our invention is to provide an efficient and reliable air valve that
may be readily constructed and fitted to the air supply tube or connection.
In carrying our invention into effect we form the air or supply tube in the usual
manner, from brass or other metal, with a circular or other head, and having a
We cut or turn
screw thread on the exterior surface, for the lock nuts and a cap.
down the end of the tube to form a suitable surface for closing down the valve.
The valve consists of a flat piece of leather, or other material, of a square,
hexagonal, or other configuration, arranged to allow air to pass the outer edges.
We insert the valve within a metal cap or chamber, having an internal thread for
screwing on to the supply tube attached to the tyre and a hollow screw stem, to
form the connection with the pump. The said cap is arranged with a seating and a
turned groove expands the seating beyond the screw thread within the cap; thus
forming a chamber within which the leather valve operates. The edges of the
leather valve are pressed into the groove and serve to hold the valve near the
seat.
When the metal cap is screwed tightly on to the supply tube, the leather valve
is forced against the end of the said tube, and seals the end of the tube so that no
air can be pumped into or escape from the tyre. On slightly turning the metal
cap, however, the air under the pressure within the tyre forces the valve from the
end of the tube and holds it on its seat within the cap. Air may then be pumped
past the valve into the tyre.
When the tyre has been pumped up to the desired pressure, the cap or chamber
is screwed up tightly, and the valve is pressed between the cap seat and the end of
the tube so as to prevent escape of the compressed air from the rubber tube of the
tyre. A clamping or locking nut or washer on the body of the supply tube may be
employed, for locking the valve cap or chamber in position and for preventing
escape of air by way of the screw thread.
Dated this 21st dox of April 1894
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicants.

page_text: improvements in valves for Pneumatic Tyres.
We, CAPON HEATON AND COMPANY LIMITED, and HARRY HEATON the
younger, Managing Director of the Firm of Capon, Heaton and Company Limited,
of Lifford Mills, Kings Norton, in the County of Worcester, Manufacturers, 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 valve for the air supply tube or connection
of a pneumatic tyre.
The object of our invention is to provide an efficient and reliable air valve that
may be readily constructed and fitted to the air supply tube or connection.
Referring to the accompanying sheet of drawings:-
Figure 1 is an external view, and Figure 2 is a plan of the valve.
Figure 3 is a section showing the action of the valve when air is being pumped
into the tyre.
Figure 4 is a section showing the valve screwed home.
Figures 5 and 6 each show in edge view and plan a valve suitable for our
purpose.
The drawings are shown larger than the actual article manufactured in order to
show the various parts clearly.
In carrying our invention into effect we form the air or supply tube B in the usual
manner, from brass or other metal, with a circular or other head, and having a screw
thread on the exterior surface, for the lock nuts and a cap. We cut or turn down
the end of the tube to form a suitable surface B' for closing down the valve. The
valve consists of a flat piece of vulcanised fibre leather C or other material, of a
square, hexagonal, or other configuration, arranged to allow air to pass the outer
edges. We insert the valve within a metal cap or chamber A, having an internal
thread for screwing on to the supply tube B, attached to the tyre, and a hollow
screw stem A² to form the connection with the pump. The said cap A is arranged
with a seating, and a turned groove A¹ expands the seating beyond the screw thread
within the cap, thus forming a chamber within which the leather or other valve C
operates. The edges of the leather valve C are pressed into the groove and serve
to hold the valve near the seat.
It will be observed that the extreme diameter of the leather valve C in either
form as shown at Figures 5 and 6 is greater than the bore within the screw thread
of the cap A, but less than the diameter of the chamber A'. The valve C has thus
to be pushed into the chamber A' by slightly bending the edges.
When the metal cap A is screwed tightly on to the supply tube B, the leather or
other valve C is forced against the end B₁ of the said tube and seals the end of the
tube so that no air can be pumped into or escape from the tyre as shown in Figure 4.
On slightly turning the metal cap A, however, the air under pressure within the
tyre forces the valve C from the end B₁ of the tube B, and holds it on its seat
within the cap A. Air may then be pumped past the valve into the tyre as shown
at Figure 3.
When the tyre has been pumped up to the desired pressure, the cap or chamber
is screwed up tightly as shown in Figure 4, and the valve is pressed between the
cap seat and the end of the tube so as to prevent escape of the compressed air from
the rubber tube of the tyre. A clamping or locking nut or washer on the body of
the supply tube B may be employed as shown in the drawings, for locking the
valve cap or chamber in position and for preventing escape of air by way of the
screw thread.
D is the ordinary cap to cover the stem A².

page_text: Recesses C' in the valve C Figure 5 allow the air to pass freely, and in the
valve C Figure 6 the air passes by the straight sides of the square.
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
A valve for pneumatic tyres comprising a vulcanised fibre, leather, or like
piece C, operating between faces on the tube B, and in the cap A, which cap is
screwed back when air is to be pumped in, and screwed tight when the valve is to.
be closed as herein set forth.
1
1001
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicants.