Improvements relating to Pneumatic Tyres.
Year: 1895

page_text: Date of Application, 19th Aug., 1895
Complete Specification Left, 15th May, 1896-Accepted, 20th June, 1896
PROVISIONAL SPECIFICATION.
Improvements relating to Pneumatic Tyres.
I, WILLIAM STARLEY, of St. John's Works, Coventry, in the County of
Warwick, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
1
This invention consists of improvements relating to pneumatic tyres, my object
being to provide means for readily and securely attaching the metallic valve
to the inner rubber tube of the pneumatic tyre of a cycle or other vehicle
wheel.
In carrying my invention into effect I employ an inner continuous or endless
tube of india rubber of ordinary construction, for containing the compressed air.
At any position around this tube I pierce or form a hole or aperture large enough
to freely admit the head or flange of the metallic valve, and also the central portion
of an india-rubber jointing strip or washer which I secure around the valve aperture
on the exterior surface of tube.
I form the jointing strip or washer of an elliptical or other shape or configura-
tion, making its central portion of a considerable thickness, but gradually tapering
it down towards its edges, which are of a toothed, zig-zag, or like form. I am
thus enabled to obtain additional material around the valve aperture without
any abrupt difference in the thickness of the rubber, and to avoid any undue or
excessive local straining of the rubber at the juncture of the jointing strip or
washer.
I form a hole through the centre of the jointing strip or washer large enough
to admit the stem of the valve, and through which the head or flange may be
forced by the expansion or stretching of the rubber immediately around the hole.
I preferably undercut the underside of the valve head or flange to correspond with
a dove-tailed seating on the inner side of the jointing strip. On the outer side of
the central portion of the strip I provide a circular groove, preferably of a
✓ section, to receive a wedge shaped circular projection from the outer washer.
The india rubber pad is finely checkered on the side where it is solutioned to the
inner tube; this will give it a better holding, and make it less liable to slip. Upon
screwing or tightening up the ordinary nut on the screwed stem of the valve, the
valve head or flange is drawn tightly on to its dove-tailed seating, whilst the
wedge projection of the outer washer is forced into the V shaped groove of
the rubber, and in this manner an air-tight joint or connection is readily formed
between the valve and the rubber tube, and the two parts are securely attached to
each other.
I adapt my improved attachment between the air tube and the valve to suit any
particular type of pneumatic tyre, making such modifications as may be necessary
to suit varying requirements.
Dated this 19th day of Avoust 1805

page_text: Improvements relating to Pneumatic Tyres.
I, WILLIAM STARLEY, of St. John's Works, Coventry, in the County of
Warwick, 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 consists of improvements relating to pneumatic tyres, my object
being to provide means for readily and securely attaching the metallic valve
to the inner rubber tube of the pueumatic tyre of a cycle or other vehicle
wheel.
In the accompanying sheet of explanatory drawings to be hereinafter
referred to,
Figure is a part sectional elevation of a portion of an air tube for a pneumatic
tyre having the valve attached thereto.
Figure 2 is a plan of the underside, Figure 3 an elevation, and Figure 4 a plan
of the outer side of the valve pad or jointing strip.
The same reference letters in the different views indicate the same parts.
In carrying my invention into effect I employ an inner continuous or endless
tube of india rubber such as A of ordinary construction, for containing the com-
pressed air. At any position around this tube I pierce or form a hole or aperture
large enough to freely admit the head or flange of the metallic valve B, and
also the central portion of an india rubber pad or jointing strip C which I
secure around the valve aperture on the exterior surface of tube, as illustrated at
Figure 1.
I form the pad or jointing strip C preferably of an elliptical shape or configura-
tion as illustrated at Figures 2 and 4, making its central portion thicker than the
edges, and providing a gradually tapering surface as shown at Figure 3. The
edges are of a toothed, zig-zag, or like form, as illustrated at Figures 2 and 4.
I am thus enabled to obtain additional material around the valve aperture
without any abrupt difference in the thickness of the rubber, and to avoid any
undue or excessive local straining of the rubber at the juncture of the jointing
strip or pad..
Iform a hole C' through the centre of the jointing strip or pad large enough to admit
the stem, of the valve B,.and through which the head or flange of the valve may be
forced by the expansion or stretching of the rubber immediately around the hole.
I. preferably undercut the underside of the valve head or flange, as shown at
Figure 1, to receive the projection C from the inner side of the jointing strip.
On the outer side of the central portion of the strip I provide a projection C³ to
form a seating for the undercut outer washer D. The indiarubber pad C is
checkered on its underside where it is solutioned or otherwise secured to the
inner tube A to give it a. better holding, and make it less liable to slip. Upou
screwing or tightening up the ordinary nut E on the screwed stem of the valve,
the valve head or flange is drawn tightly on to the seating. formed by the
projection C whilst the outer washer D is forced on to its seating formed by
the projection C³, and in this manner an air-tight joint or connection is readily
formed between the valve and the rubber tube, and the two parts are securely
attached to each other..
I adapt my improved attachment between the air tube and the valve to suit any
particular type of pneumatic tyre, making such modifications as may be necessary
to meet varying requirement..

page_text: 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. The improved pad or jointing strip for securing the valve to the air tube of a
pneumatic tyre, having a checkered under surface and serrated edges, and with its.
central portion thicker than the edges, substantially as described.
2. In pneumatic tyres the combination of an air valve such as B having an
undercut head or flange, and an undercut washer D, with the pad or jointing
strip C having a checkered under surface and serrated edges, and with central.
projections C and C³, substantially as herein described and as illustrated in the
accompanying drawings.
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.