Improvements in and relating to Pneumatic Tyres.
Year: 1896

page_text: Date of Application, 12th June, 1896
Complete Specification Left, 12th Apr., 1897-Accepted, 15th May, 1897
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
I JOHN COLLBRAN, of 151 Regent Street, W., in the County of London, Jeweller
do hereby declare the nature of this invention to be as follows:-
This invention has for its object to enable a "single tube tyre” to be easily and
readily repaired, from the inside (which has hitherto been impracticable): by
constructing such tyres in such a way, that a band, such as is now used for the outer
covering, may be made air-tight and be utilised as the air chamber.
In order to effect this, I employ a hollowed out rim, and into this rim I insert a
pneumatic tube, which projects through the opening of the hollowed out rim, so
that when the tube is inflated, it shall hermetically seal the band forming the tyre
proper.
According to one way of carrying my invention into effect, to the inside of the
hollowed out rim, I solution or otherwise suitably fix one edge of the band forming
the tyre proper, and I attach to the other edge or form therewith the aforesaid
pneumatic tube, which is then inserted in the hollowed out rim, so that when it is
inflated it shall hermetically close the band forming the tyre proper, by pressing
against the inside of this latter, which can then be inflated as follows:-
In order to inflate the two air chambers, I provide a special double valve, s
constructed and arranged that the two chambers can be inflated from one inlet.
According to one way of constructing this valve, I make a tube sufficiently long to
pass through the rim and entirely through the inner air chamber, such tube having a
rod running through same, to the bottom end of which I connect a washer, forming a
valve, which is opened and closed by turning a nut or other contrivance at the head
of the rod. This would inflate the outer air chamber, and in order to construct this
valve for inflating the outer air chamber also, 1 pass another tube loosely over the
upper portion of the first mentioned tube, so that by screwing a nut on the head of
the tube, the second mentioned tube opens and closes a valve fixed at the bottom of
this latter.
I may have two of the aforesaid inner air chambers, instead of only one, and this
will be found desirable for wheels such as those of carriages. In this case I should
have one valve for each of the air chambers, connected up preferably so as to
communicate with one inlet.
By constructing tyres as above, the band forming the tyre proper can, when
deflated, easily be laid open and repaired inside; moreover in the event of a puncture,
the inner air chamber forms a cushion, so that the wheel may be temporarily used,
without cutting the band of which the tyre proper is composed.
Dated this Twelfth day of June 1896.
BROWNE & Co.,
9 Warwick Court, Gray's Inu, London, W.C., Agents for the Applicant.

page_text: Improvements in and relating to Pneumatic Tyres.
I JOHN COLLBRAN of 151 Regent Street W., in the County of London, Jeweller,
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 has for its object to enable a single tube tyre to be easily and
readily repaired from the inside (which has hitherto been impracticable) by
constructing such tyres in such a way that a band such as is now used for the
outer covering may be made air-tight and be utilized as the air chamber.
In order to effect this, I employ a hollowed out rim and into this rim I insert a
pneumatic tube which projects through the opening of the hollowed out rim so
that when the tube is inflated it shall hermetically seal the band forming the tyre
proper.
According to one way of carrying my invention into effect, to the inside of the
hollowed out rim I solution or otherwise suitably fix one edge of the band forming
the tyre proper, and I attach to the other edge or form therewith the aforesaid
pneumatic tube, which is then inserted in the hollowed out rim, so that when it is
inflated it shall hermetically close the band forming the tyre proper, by pressing
against the inside of this latter, which can then be inflated.
I may have two of the aforesaid inner air chambers, instead of only one, and this
will be found desirable for wheels such as those of carriages.
By constructing tyres as above, the band forming the tyre proper, can, when
inflated, easily be laid open and repaired inside; moreover in the event of a puncture,
the inner air chamber or chambers forms or form a cushion or cushions so that the
wheel may be temporarily used, without cutting the band of which the tyre proper is
composed.
And in order that my said invention may be better understood I will now proceed
to describe the same with reference to the drawings accompanying this specification
in which
Fig. 1 shews the section of a rim and tyre (the latter deflated) constructed according
to my said invention; Fig. 2 a section of the same rim and tyre, but shewing the tyre
inflated; and
Fig. 3 a section of a rim and inflated tyre made according to my invention and
suitable for such wheels as those of carriages and other vehicles of a heavier class
than velocipedes.
Fig. 4 shews a section of another form of rim such as I may employ.
The same letters denote the same parts in all the views.
a shews hollowed out rim, the tyre proper, the pneumatic tube fitting in the
hollowed out rim a. The tyre shewn at Fig. 3 is fitted with two pneumatic tubes e c.
It will be seen on reference to Figs. 1 and 2 that the same band forms both the tyre
proper and the inner pneumatic tube c. The tube c may however be formed of
another band and be attached to the free end of the tyre b. d Figs. 1 and 2 shews
the end of the band forming the tyre, cemented or otherwise attached to the rin a.
The band is shewn detached at Figs. 5 and 6. Fig. 5 represents the band having
its edges turned over so as to form the two tubes c c Fig. 3. In the case of a tyre
such as that shewn at Fig. 1 only one of the edges would be turned over, the opposite
edge being cemented to the rim.
By thus turning over the edge or edges, it will only be necessary to have a plain
band as shewn in cross section at Fig. 6.
I may cut the canvas of the tyre on the bias, so that a contractile force will be set
up when the tyre is inflated and this force will hold the tyre on to a rim such as that

page_text: shewn at Fig. 4, or I may place a nonstretchable band round the tyre at the part
marked in Figs. 1 and 2 or I may form the material of which the tyre is made
nonstretchable at this part.
It will be seen that when the inner tube c or inner tubes c c is or are inflated, the
tyre proper b will be hermetically closed.
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 improvements in and relating to single tube pneumatic tyres, substantially
as and for the purposes set forth.
2. In single tube pneumatic tyres, the employment of a band such as that shewn at
Fig. 1 of the drawings having one of its edges attached to a hollowed out rim, the
other edge being turned over, all substantially as and for the purposes set forth.
3. In single tube pneumatic tyres, the employment of a band such as that shewn at
Fig. 5 of the drawings, having both its edges turned over, substantially as and for the
purposes set forth.
4. In single tube pneumatic tyres, the employment of a band having a pneumatic
tube such as that shewn at Fig. 3 (c) attached to one or both of its edges, substantially
as and for the purposes set forth.
Dated thic 19th day of Auril 1807
BROWNE & Co.,
9 Warwick Court, Gray's Inn, London, W.C., Agents for the Applicant.