Improvements in and relating to Valves for Pneumatic Tyres.
Year: 1897

page_text: Date of Application, 23rd Aug., 1897
PROVISIONAL SPECIFICATION.
Improvements in and relating to Valves for Pneumatic Tyres.
I, ALBERT ISAAC MCCULLAH, Secretary of the Trench Tubeless Tyre Company
Limited, of 20, Haymarket, London, in the County of Middlesex, do hereby
declare the nature of this invention to be as follows:
This invention relates to a method and means of attaching a valve to a
pneumatic tyre, more especially designed for that type of tyre known as a
tubeless" pneumatic tyre, its object being to overcome the many defects which
are at present met with in making an air tight joint between the valve stem and
the edge of the tyre.
In carrying out my invention I use any well known type of valve and the stem
portion which is adapted to make joint with the tyre is preferably reduced in
diameter and for a sufficient length to slightly project through the inner surface
of the tyre, to this projecting portion is attached preferably by india-rubber
solution and wire or the like, the neck of a rubber cap patch, preferably moulded
to the desired shape and having a collar or shoulder formed round the upper edge
of its neck; this cap or patch is solutioned on its under side or otherwise attached
to the inner surface of the tyre. To prevent the stem from being pulled through
or accidentally withdrawn from the neck of the cap or patch, I provide a flat
headed stud or the like adapted to be screwed into the bore of the upper part of
the valve stem, the head being of a sufficient diameter to cover the neck of the
cap or patch and so effectually prevent the valve stem from being pulled through.
This stud is bored or perforated to allow of the ingress and egress of the air.
Owing to the above construction it will be readily understood that the tyre may
be ridden in a deflated condition without fear of injury either to the valve or
tyre.
Improvements in and relating to Valves for Pneumatic Tyres.
I, ALBERT ISAAC MCCULLAII, Secretary of the Trench Tubeless Tyre Company.
Limited, of 34, Holborn Viaduct, in the City and County of London, do hereby
declare the nature of this invention and in what manner the same is to be per-
Price Rd

page_text: formed to be particularly described and ascertained in and by the following
statement:-
"
This invention relates to a method and means of attaching a valve to a
pneumatic tyre, more especially designed for that type of tyre known as tubeless,"
in which the space available for the attachment of the valve is limited.
In the accompanying drawing which illustrates this invention:-
Figure 1 is a view in sectional elevation of a valve stem embodying this inven-
tion and
Figure 2 is a view in plan thereof.
Figures 3 and 4 are views in sectional elevation and plan respectively showing
a modification.
Throughout the views similar parts are marked with like letters of reference.
The valve stem A which is adapted to carry or be fitted with any suitable type
of valve and is adapted to be fixed to the tyre, is reduced in diameter at that part
adapted to pass through the wall of the tyre for such a length that the reduced
part projects into the tyre. This reduced and projecting part a of the valve stem
is fixed to the tyre by means of a rubber flanged sleeve B3 which is solutioned to
the tyre and attached to the part a of the valve stem by being bound thereon
with wire or its equivalent. The flanged sleeve B is preferably thickened at its
upper edge b. To prevent the reduced part a of the stem A from being pulled
through or accidentally withdrawn from the flanged sleeve B, a cap headed screw C
is screwed into the bore of the valve stem which is threaded to receive it, the
construction being such that the capped head c of the screw engages with the
upper edge 6 of the flanged sleeve B and so compresses it that it makes an air-
tight joint therewith. The cap headed screw C is made hollow so as to preserve
the continuity of the bore of the stem A.
As a modification the head c of the screw C may be coned as shown in Figures 3
and 4 so that it engages with the inner surface of the upper edge of the Hanged
sleeve B and by expanding it forms a seal or air-tight joint between the screw
and the sleeve.
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:-
(1) Attaching the stem of a valve to a pneumatic tyre by means of a flanged
rubber sleeve solutioned or otherwise fixed to the tyre and bound or otherwise
attached to the sleeve, and of a screw threaded into the end of the stem and
engaging with the end of the flanged rubber sleeve as set forth.
(2) In a valve for a pneumatic tyre, the combination with the stem of a
valve, of a flanged rubber sleeve such as B, and a cap headed screw such as C,
all combined, arranged and adapted to operate, as herein set forth.
(3) In a valve for a pneumatic tyre, the combination with the stem of the valve,
of a flanged rubber sleeve such as B, and a cone headed screw such as C, combined,
arranged and adapted to operate, as herein set forth.
Datod thi 171
1000
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.