Improvements in Pneumatic Tyres, and Rims therefor.
Year: 1898

page_text: Date of Application, 9th Mar., 1898-Accepted, 30th Apr., 1898
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres, and Rims therefor.
I, SIDNEY SCOBLE, of 51, Church Street, Greenwich, Gentleman, do hereby declare
the nature of this invention and in what mauner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
My invention relates to improvements in pneumatic tyres and rims therefor,
and refers more particularly to that class of tyre wherein an inner inflatable tube
is employed in combination with an outer detachable cover, the object of this present
invention being to facilitate the removal and replacement of said outer cover which
is effected primarily by an improved form or construction of the rim.
In order that my invention may be fully understood, I will now proceed to
describe same with reference to the accompanying drawings in which Fig. 1 is a
side elevation of the tyre and rim of a wheel constructed according to this invention.
Fig. 2 is a cross section through the tyre and rim drawn to an enlarged scale, and
Fig. 3 is a detail showing a method of securing the ends of the removal flange or
ring, hereinafter referred to.
According to my invention the outer cover a is furnished with inextensible
edges b preferably formed by encasing flexible bands c of steel or other suitable
material within the edges of the said outer cover. The outer cover a is placed upon
the rim a¹ and normally retained in position by the fixed flange f and the removable
flange or ring f¹, in such a manner that it is impossible for the outer cover to be
removed under normal conditions, while the tyre may be inflated by means of a
suitable inner tube of ordinary and well known construction.
The rim a which is formed with a fixed flange f is at its opposite edge furnished
with a V-shaped recess g within which is placed a removable flange f¹, preferably
formed of steel and designed to spring into position, the ends h of said flange or
ring being bent downwardly at right angles and passing through a suitable hole or
perforation in the rim, said ends of the flange or ring f being then drawn together
by any suitable device, such for instance as that shown at Fig. 3, which comprises
a preferably rectangular frame d through which the ends h of the flange or ring f¹
pass, where they are forced together by a screw d', the end of which takes into the
recess formed in one of the ends h of the ring or flange fl as shown.
By this means the flange or ring f' is tightly and closely drawn into the V-shaped
groove or recess g formed in the rim a', and in such a manner that there is no
chance of its slipping or working out until the ends h are released.
It will thus be seen that when the flange or ring f¹ is in position there is no
possibility of the outer cover being removed, when however it becomes necessary
to detach the said outer cover the clamping device d is released, the ends h of the
flange or ring fl pressed up through the hole or perforation in the rim a', when the
said flange or ring f¹ can be sprung out of the groove or recess g, and the outer
cover a easily and quickly slipped off.
It is obvious that the groove or recess g is not necessarily of V-shape in cross
section as it may be of any other convenient and suitable form.

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 new or improved tyre and rim comprising the combination of an outer
tube such as a having inextensible edges b with a suitable rim such as a¹ formed
upon one side with a permanent flange f and with a detachable or removable flange
or ring f¹ secured within a groove or recess such as 9 by means of any suitable
clamping device such as d, substantially as and for the purposes specified.
2). In a pneumatic tyre and rim therefor, the employment of a removable or
clamping device such as d, substantially as and for the purposes specified.
3.) The improvements in pneumatic tyres and rims therefor substantially as
herein described and shown with reference to the accompanying drawings and for
the purposes specified.
F. G. CASSELL,
(Of Cassell & Co.),
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicant.