Improvements in Wheel-rims and Tyres.
Year: 1898

page_text: Date of Application, 20th June, 1898--Accepted, 23rd July, 1898
[Communicated from abroad by THOMAS B. JEFFERY, of Sheridan Park, Chicago,
Illinois, United States of America, Manufacturer.]
Improvements in Wheel-rims and Tyres.
I, DAVID YOUNG, Patent Agent, of the Firm of D. Young & Co., of 11 and 12,
Southampton Buildings, London, W.C., 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 :-
My invention has for its object the production of a pneumatic tyre of that class
in which the outer sheath or covering is held to the rim by the contained air
pressure, one or both edges being removable from the rim when the tyre is deflated.
The object of the invention is to produce a tyre of the character just described
but of such construction that the expansive pressure of the contained air does
not come on the rim with as great a force as is customary in tyres which are locked
on to the rim by an interlocking engagement between each edge of the sheath or
tyre and the rim. My present invention can be employed either in a single tube or
hose pipe construction or in a double tube tyre. It is probably more effective in the
latter construction and will probably be used to a greater extent in that construction.
It consists of a combination of devices and appliances hereinafter described and
claimed.
In the drawing:
-
Figure 1 is a cross section of a rim and tyre, the edges of the outer sheath being
connected together, and the inner tube not inflated.
Figure 2 is a cross section of a tyre showing the inner tube inflated and the tyre
ready for use.
Figure 3 illustrates the construction when used as a single tube tyre.
A represents the wheel-rim which is provided on its face with a series of ridges or
what may be termed "sharpened corrugations" a. B represents the outer sheath
and C the inner tube of a double tube pneumatic tyre.
As in the "Clincher" form
of tyre, the outer sheath, instead of being a complete cylinder, is divided and its
edges b-61 when disconnected are separable, so that, by disconnecting the edges and
lifting one of them from the rim, the inner tube can be drawn out for repair purposes,
or if desired the entire outer sheath can be removed. On the inner face of the sheath
and near the edge b is a small projection 62. Engaged to the inner face of the sheath
near the edge 6 is what may be termed a connecting flap D having on its edge a
projection adapted to engage the projection 62 on the edge 6 of the sheath.
This flap D is made of bias material preferably woven braid. The action of
this braid or bias material when in use is to stretch slightly, but, by such
stretching in width, it is shortened longitudinally and the flap extending entirely
around the circumference of the edge of the outer sheath, when it thus shortens in
length, binds the outer sheath to the rim. The operation is obvious. The
projection d engaging the projection 62, causes the flap to connect the two edges of
the outer sheath together, and, when the inner tube is inflated as in Figure 2, this
flap D, stretching slightly, allows the edges of the sheath to part, but this action

page_text: shortens the flap longitudinally and the sheath is thus bound tightly to the rim.
The corrugations a engaging similar ridges on the sheath edges, keep the tyre in
proper alignment with the rim and prevent any rolling action.
By the above named construction, I have obtained several advantageous results. I
have provided a double tube tyre of such construction that the outer sheath can be
readily detached from the rim at any point desired to obtain access to the inner tube
for repair purposes, or the like, and at the same time I have made a tyre of such
construction that strain comes largely on the sheath itself and not upon the rim.
This is of particular advantage where a wood or non-metallic rim is used as it lessens
to a large extent the liability of the material to split.
While in Figures 1 and 2, I have shown a construction wherein an inner tube is
used, yet it is obvious that for some classes of work, my construction might be
employed as a single tube or hose pipe tyre. In this case by providing a soft cement
at the points of engagement as indicated in Figure 3 by the heavy line E, so as to
make the contact points air-tight, the outer sheath alone could be readily employed as
a single tube tyre and yet when it was desired to gain access to the interior, all the
operator would have to do, would be to separate the cement E at the particular point
desired.
It is obvious that the construction might be varied in many particulars without
departing from the spirit of the invention, which consists essentially in the provision
of a tyre having two circumferential lines at its proximity to the rim engaged
together by an endless connecting strip extending around the length of the tyre and
adapted when stretched laterally to contract longitudinally.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, as cominunicated to me by my
foreign correspondent, I declare that what I claim is :-
1. A wheel-tyre, the edges of which are connected together by an endless
connecting strip adapted when stretched laterally to contract longitudinally,
substantially as described.
2. A wheel-tyre, the edges of which are connected together by an endless
connecting strip permanently attached to one edge of the tyre and detachably
engaged to the other edge thereof and adapted when stretched laterally to contract
longitudinally, substantially as described.
3. A wheel-tyre having separable edges provided on its interior concave surface and
near one edge with a flap, the latter being provided near its edge with a projection,
and another projection near the other edge of the tyre adapted to be engaged by the
flap-projection, substantially as described.
4. A wheel-tyre having separable lines of engagement with the rim, provided on
its interior concave surface and near the rim with a continuous flap extending the
length of the tyre, and adapted to engage the other line of engagement on the tyre,
the said flap being adapted when stretched laterally to contract longitudinally,
substantially as described.
5. A wheel-rim provided on its outer concave surface and within each edge with a
series of corrugations substantially as described and for the purpose specified.
DEI DOLL
1000
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.