Improvements in or relating to Pneumatic Tyres for the Wheels of Velocipedes and Road Vehicles.
Year: 1896

page_text: Improvements in or relating to Pneumatic Tyres for the Wheels of
Velocipedes and Road Vehicles.
I, PERCY WIGLEY, of The Ferns, Saint Bernard's Road, Oltou, in the County
or Warwick, Engineer, do hereby declare the nature of this Invention to be as
follows:-
This Invention consists of the herein-described improvements in or relating to
pneumatic tyres for the wheels of velocipedes and road vehicles.
many methods have been adopted for securing to the trough section wheel rim
the combined indiarubber and canvas or other flexible outer covering of the inner
air tube, one of the best known methods being the form described in Welch's
specification No. 14,563 of A.D. 1890 in which the two edges of the endless ring
like outer covering of the tyre are each provided with an endless wire ring of
rather smaller diameter than the largest diameter of the trough section wheel
rim and of rather larger diameter than the bottom of the trough of the wheel
rim, these wired edges taking into the trough of the rim. This method of
attaching the outer covering to the wheel rim is very secure but it is open to the
objection that it is sometimes very difficult to get both of the wired edges of the
outer covering and the inner air tube into their right positions in the trough of
the wheel rim, although it is comparatively easy to spring only one of the said.
wired edges into the trough of the wheel rim. It is moreover often very diffi-
cult to spring one of the wired edges out of the trough of the wheel rim for the
removal or examination of the inner flexible air tube and moreover the said air
tube cannot be properly examined without removing the whole of the one wired
edge from the wheel rim. The object of my Invention is to so construct and
arrange the flexible ring like india rubber, and canvas or other flexible outer
covering of the inner air tube and the metal wheel rim, that one or both sides
of the outer covering can very readily be removed from the wheel rim and be
very readily replaced thereon without diminishing the secure attachment of the
tyre to the rim.
In carrying out this Invention I employ a trough section wheel rim one edge
only of which is turned inwardly and on the edge of the flexible outer covering
of the tyre corresponding with this turned in or undercut edge of the rim I pro-
vide and fix metallic hooks at short distances apart which when the outer covering
is in position over the air tube on the wheel rim can be engaged with the turned-
in edge of the rim and thus effectually secure this edge of the outer covering to
the rim.
The other edge of the said outer covering is provided with a wire ring or core
or chain which is by preference endless and inextensible and is made of rather
smaller diameter than the largest diameter of the wheel rim but of larger
diameter than the wheel rim in the bottom of the trough of the same, so that
the wired or cored edge of the outer covering can readily be sprung over the

page_text: largest part of the rim into position therein. In placing the tyre above described
on the wheel rim, the wired edge of the outer covering is first sprung into or
stretched into, position over the largest part of the wheel rim, this wired edge of
the outer covering corresponding with that edge of the trough section wheel rim
which is not or may not be turned inwardly.. The inner indiarubber air tube is
now placed into position round the trough of the rim. The other edge of the
outer covering which is made with the hooks is now turned inwardly over the air
tube so that the hooks will engage with the turned in edge of the wheel rim and
when these hooks have been pressed in all round the tyre and the inner air tube
inflated the attachment of the outer covering to the wheel rim is complete.
When it is desired to examine the inner air tube that edge of the outer covering
which is provided with the hooks is unhooked from the turned in edge of the rim
when the air tube can be removed.
It will be seen that by my arrangement I obtain in combination the well
known advantages of a pneumatic tyre in which the outer covering is hooked and
of a pneumatic tyre in which the edges of the outer covering are wired on to the
rim as by my invention the outer covering is by the wire ring or core effectually
prevented from coming off the rim of the wheel whilst the hooked side allows of
better access to the air tube than is possible when both of the edges of the outer
covering are wired.
D
11
101 1
La
1000
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
Improvements in or relating to Pueumatic Tyres for the Wheels of
Velocipedes and Road Vehicles.
I, PERCY WIGLEY, of The Ferns, Saint Bernard's Road, Olton, in the County
of Warwick, Engineer, 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 the herein-described improvements in or relating to
pneumatic tyres for the wheels of velocipedes and road vehicles. Heretofore
many methods have been adopted for securing to the trough section wheel rim
the combined indiarubber and canvas or other flexible outer covering of the inner
air tube, one of the best known methods being the form described in Welch's
specification No. 14,563 of A.D. 1890 in which the two edges of the endless ring
like outer covering of the tyre are each provided with an endless wire ring of
rather smaller diameter than the largest diameter of the trough section wheel
rim and of rather larger diameter than the bottom of the trough of the wheel
rim, these wired edges taking into the trough of the rim. This method of
attaching the outer covering to the wheel rim is very secure but it is open to the
objection that it is sometimes very difficult to get both of the wired edges of the
outer covering and the inner air tube into their right positions in the trough of
the wheel rim, although it is comparatively easy to spring only one of the said
wired edges into the trough of the wheel rim. It is moreover often very diffi-
cult to spring one of the wired edges out of the trough of the wheel rim for the
removal or examiner of the inner flexible air tube and moreover the said air
tube cannot be properly examined without removing the whole of the one wired

page_text: edge from the wheel rim. The object of my Invention is to construct and
arrange the flexible ring like indiarubber and canvas or other flexible outer
covering of the inner air tube and the metal wheel rim, that one or both sides
of the outer covering can very readily be removed from the wheel rim and be
very readily replaced thereon without diminishing the secure attachment of the
tyre to the rim.
I will describe my Invention by referring to the accompanying drawing on
which Fig. 1 is a cross section of a pneumatic tyre constructed according to this
Invention; Fig. 2 is a perspective view of a portion of the outer covering of the
tyre separate from the wheel rim and air tube; Fig. 3 is a cross section of the
wheel rim and Fig. 4 is a separate view of one of the hooks of the tyre shewn by
Figs. 1 and 2.1
The same letters of reference indicate the same or corresponding parts in all
the Figures.
A is the outer covering of the tyre, B is the inner flexible air tube and C is
the wheel rim.
In carrying out this Invention I employ a trough sectional wheel rim C one
edge el only of which is turned inwardly and on or near the edge al of the flexible
outer covering A of the tyre corresponding with this turned in or undercut edge el
of the rim C, I provide and fix metallic hooks D at short distances apart all round
the tyre, which hooks when the outer covering is in position over the air tube B
on the wheel rim C as shown in Fig. 1, can be engaged with the turned in odgo.e
of the rim C and thus effectually secure the edge of the outer covering Å to
the rim C.
The other edge as of the outer covering A is provided with a wire ring or
core E or a chain enclosed in the folded over edge as of the tyro
in the way well known, and this wire ring or core or chain is
by preference endless and inextensible and is, as in what is known
a Welch tyre, made of rather smaller diameter than the largest diameter
of the wheel rim C but of rather larger diameter than the wheel rim at th
point in the bottom of the trough of the same so that the wired or cored edge a²
of the outer cover A can readily be sprung over the largest diameter of the im
into position thereon.
a²
In placing the tyre above described on the wheel rim C, the wired edge a³ of
the outer covering A is first sprung into or stretched into position in the usual way
over the largest part of the wheel rim, this wired edge of the
outer covering A corresponding with that edge e of the trough section wheel
tube B is now placed in position round the trough of the rim C. The other
edge al of the outer cover A which is made with the hooks D is now turned
inwardly over the air tube B so that the hooks 1 will engage with the turned
in edge e' of the wheel rim C and when these hooks I have teen pressed in all
round the rim and the inner air tube B inflated, the attachment of the outer
covering A to the wheel rim C is completed. When it is desired to examine the
inner air tube B, the edge al of the outer covering A. which is provided with the
hooks D is unhooked from the turned in edge c' of the rim C so that the air tube B
can then be removed.
It will be seen that by my arrangement I obtain in combination the well
known advantages of a pneumatic tyre in which the outer covering
is hooked to the rim and of a pneumatic tyre in which the edges
of the outer covering are wired on to the rim, as by my Invention
the outer covering is by the wire ring or core E effectually prevented
from coming off the rim of the wheel whilst the hooked side al
allows of better and quicker access to the air tube than is possible when
both edges of the outer covering are wired on the rim as in the well know:
pneumatic tyres of various kinds now in use.
The hooks which are fixed at or near one edge of the outer covering A of the
tyre as above described to engage with the turned in part el of the wheel rim

page_text: may be of any convenient kind as there are many hooks at present in use for
pneumatic tyres and for other purposes which will answer my purpose. The
hook D shewn on my drawing is made of stout flat metal with two inwardly
projecting side prongs d¹ d which are passed through the material of the tyre and
clenched over at the inner side of the same the hook being further secured by
a rivet d passing through the hole in the hook and through the material
of the tyre.
I am well aware that prior to my Invention the outer covers of pneumatic
tyres of the kind herein referred to have been made with hooks along both sides
of the outer covering as in the well known Grappler tyres to engage with the
turned in edges of the wheel rim but it is found that these tyres are troublesome
to attach to the wheel rim as the hooks at one side of the outer covering are liable
to become unhooked from the wheel rim whilst the hooks on the other side are
being hooked thereto which objection I overcome by my Invention as after the
wired side a of my tyre has been once placed in position on the wheel rim it
cannot get out of position the hooks at one side of the rim giving all the nceessary
facility for access to the interior of the tyre.
Moreover, in those tyres in which the outer covering is made with
hooks on both sides thereof it sometimes happens that all the hooks are
not properly engaged with the rim and the tyre is liable to blow off the rim at
such part or parts. By employing the hooks along one side only of the outer
covering as in my Invention I diminish the number of hooks by one ha and
therefore I materially reduce the chances of some of the hooks being improperly
engaged with the rim.
Although with my improved outer covering it is only necessary for one edge
of the wheel rim to be turned inwardly as above described, still it is to be under-
stood that without departing from the nature of my said Invention my improved
outer covering A may be used with one of the well known wheel rims in which
both edges are turned inwardly.
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:
The improved combined pneumatic tyre and wheel rim consisting of a trough
section wheel rim made with one or both edges turned inwardly an inflatable
indiarubber air tube fitting around said rim and an indiarubber or like outer
covering fitted with one wire ring or core or chain inserted within one edge thereof
and embracing the trough of said wheel rim and fitted with hooks at the other
edge engaging with the turned in edge or with one of the turned in edges of the
wheel rim substantially as herein described.
100
1008
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.