Improvements in or relating to Pneumatic Tyres.
Year: 1896

page_text: Date of Application, 21st Sept., 1896
Improvements in or relating to Pneumatic Tyres.
We GEORGE WACKERBARTH, Engineer and CHARLES MANDELL, Estate Agent,
both of 199 Bishopsgate Street Without in the County of London, do hereby
declare the nature of this Invention to be as follows:-
This Invention relates to the class of pneumatic tyres known as tubeless tyres
and it consists in having a special rim in which is provided a deep channel at the
centre of its width for the reception of the edges of the endless band which forms
the tyre as hereafter described.
We form the tyre of an endless band of india rubber and canvas preferably
slightly thickened at its edges, and to each of such edges we fix a flat circular
band of metal or other suitable rigid material. The aforesaid channel in the rim
should be considerably deeper than the width of the aforesaid rigid bands so that
the edges of the aforesaid endless band may be fitted into the aforesaid channel
formed in the rim.
The two edges of the endless band which forms the tyre project up into the tyre
so that when it is inflated the pressure of air shall tend to press the two edges
together and thus aid in forming an air seal. We provide suitable fastening
arrangement for holding the aforesaid rigid bands together, or this may be effected
by lateral pressure exerted by or from the rim.
The rubber tyre may be covered with the usual outer covering.
D
011 1
1000
BROWNE & Co.,
9 Warwick Court, Gray's Inn, London, W.C.,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in or relating to Pneumatic Tyres.
We GEORGE WACKERBARTII, Engineer, and CHARLES MANDELL, Estate Agent,
both of 199 Bishopsgate Street Without, in the County of London, 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 refers to improvements in or relating to pneumatic tyres, more
especially to that class of pneumatic tyres known as tubeless tyres.
The invention consists in having a special rim in which is provided a deep
channel at the centre of its width, for the reception of the edges of the. endless
band which forms the tyre as hereafter described.

page_text: We form the tyre of an endless band of india rubber and canvas preferably
slightly thickened at its edges, and to each of such edges we fix a flat circular
band of metal or other suitable rigid material. The aforesaid channel in the rim
should be considerably deeper than the width of the aforesaid rigid bands so that
the edges of the aforesaid endless band may be fitted into the aforesaid channel
formed in the rim.
The two edges of the endless band which forms the tyre project up into the tyre
so that when it is inflated the pressure of air shall tend to press the two edges
together and thus aid in forming an air seal. We provide suitable fastening
arrangement for holding the aforesaid rigid bands together, or this may be effected
by lateral pressure exerted by or on the rim.
The rubber tyre may be covered with the usual outer covering.
And in order that our said invention may be better understood we will now
proceed to describe the same with reference to the drawing accompanying this
specification in which fig. 1 shews an elevation of a rim and tyre made according
to this invention; fig. 2 shews a section of same.
The same letters denote the same parts in both the views.
a shews the rim, b a deep channel therein, e the tyre formed of an endless band
of india rubber and canvas. dd shew two flat circular bands of metal or other
suitable rigid material one of which is fixed to each edge of the tyre c. These
bands d d fit in the groove or channel b, and being covered with rubber on both
sides and forced into the groove b are held tightly in that position by the elasticity
of the rubber, and thus form an air seal. These bands d d may be cut instead
of being entire rings, to facilitate passing them over the rims. The extreme
edges e el of the tyre c project up into the tyre so that when it is inflated the
pressure of air shall tend to press the two edges e e' together, thus further ensuring
the formation of the air seal.
If necessary, means (such as screw bolts) may be provided for further securing
the bands d in place.
Although we have shewn on the drawing a hollow rim we do not intend to limit
ourselves to this description of rim, as we may have any other suitable rim
provided with the channel b.
The endless band c with the rings d d¹ may be used as a covering for the air
tube or pneumatic tyres, in which case the said endless band need not be lined
with rubber.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed we declare that what
we claim is:-
1. In tubeless pneumatic tyres, the combination with the rim having a channel
such as that shewn on the drawing at 6 of an endless band provided at each of its
edges with a flat ring, all substantially as and for the purposes set forth.
2. In pneumatic tyres, an endless band or cover provided at each edge with a
flat ring, in combination with a rim having a channel such as that shewn
on the drawing at b, substantially as set forth.
Dated this 21st June 1897.
BROWNE & Co.,
9 Warwick Court, Gray's Inn, London, W.C.,
Agents for the Applicants.