An Improved Pneumatic Tyre.
Year: 1893

page_text: Date of Application, 21st Mar., 1893
Complete Specification Left, 5th May, 1893-Accepted, 10th June, 1893
PROVISIONAL SPECIFICATION.
An Improved Pneumatic Tyre.
CHRISTOPHER CAREY 45 Lee Crescent Edgbaston Birmingham Engineers
Assistant. I do hereby declare the nature of this invention to be as follows:-
The tyre consists of an india rubber cord containing six chambers or barrels.
The larger chamber communicates with the outer or smaller ones by means of a
small passage of valve which renders the cord or tyre los consitive in ponenssion
caused by contact with obstruction. The small barrels will serve as safety valves
in case of a fracture taking place in the wearing portion of the tyre which is the
thickest also making the tyre more buoyant. In case of fracture the main barrel
having lost a portion of its charge has a tendency to close which is augmented by
the weight of the rider thus closing the valve or passage communicating with the
other barrels the effect of which would be that the rider could continue his journey
unless further mishap occurred.
The next feature is that it is light & no burden. The durability is undoubted
by the inventor, the major portion of the consistancy of rubber being composed in
the wear and tear part the remainder being the air containers and non-wearable
Parts.
One of the chief features of this invention consists of the fact that in case of a
very abrupt obstruction the tyre is mutilitated or burst could not in
any way affect
the rider as only the portion affected would explode or collapse as the case may be
either of which are highly improbable.
March 20th 1893.
CHRISTOPHER CAREY,
45, Lee Crescent, Edgbaston
COMPLETE SPECIFICATION.
An Improved Pneumatic Tyre.
CHRISTOPHER CAREY 45 Lee Crescent, Edgbaston Birmingham Engineers
Assistant do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly de-cribed and ascertained in and by the
following statement:-
This invention relates to improvements in tyres for road vehicles and is more
particularly intended for what are now known as cycle wheel-.
My invention consists in constructing a pneumatic wheel tyre with a number of
separate tubular chambers as hereinafter described. These chambers I preferably
forin with different and graduated sizes of tubes so as to accommodate themselves
to the shape of the tyre. These chambers have air passages between them which
in their normal condition act as closed valves. When air is forced or pumped into
the pneumatic tyre, the air passages or valves are opened by the pressure of the
inflating air.
In the event of one of such chambers-for example, that chamber which is
nearest to the wear and tear of the road-being punctured or damaged so as to
become deprived of all or of a portion of the inflating air, the escape of the
inflating air from the other pneumatic chambers is prevented by the valvular
arrangement, and sufficient inflation preservel in the other pneumatic chambers of
the tyre to enable the rider to continue his journey until the damage can be
conveniently remedied.
I proceed to more particularly describe and illustrate my invention with the aid

page_text: of the accompanying drawing, having figures and numbers of reference, similar
numbers referring in the several figures to the same thing or part.
I have here illustrated and described a tyre as having six chambers because such
is a convenient arrangement, but a less or greater number of chummbers may be
adopted as circumstances may require.
Fig. 1, is a transverse section of this my invention.
Fig. 2, is a side sectional view of a part of the invention on line A-B
(Fig. 1).
1. is the tyre, 2, 3, 4, 5, 6 & 7, are longitudinal tubular chambers which pre-
ferably run through the entire length of the tyre and circumference of the wheel
when in place, but need not necessarily do so hat be broken at intervals by elastic
material similar to that of which the pneumatic tyre is made. Preferably the
tullar sectional area of the chamber 2, is equal to the others combined,
the others being graduated in size so as to accommodate themselves to the
form of the tyre. At 8, 9, 10, 11 & 12, are the marrow valvular air passages
which when the air is being forced in at the inlet 13-form communications
from chamber 3, to chambers 2, 4 & 5, and thence from chambers 4 & 5, to
chambers 6 & 7.
Chamber 2, it will be seen is near the surface exposed to the wear and tear
of the road, and therefore the only one likely to become punctured or damaged.
Should this happen a portion or all of the air escapes and the hitherto dis
tended chamber necessarily contracts or collapses, and thereby closes the valve
communication 8; thus preventing the escape of the compressed air from
chambers 3, 4, 5, 6 & 7, by means of which sufficient inflation in the tyre is
preserved to enable the rider to continue his journey until the damage can be
conveniently repaired.
It is obvious that while valvulas air passages are essential to my invention the
form may be varied without departing therefrom. Also their position may be
varied as may be desirable. Also the sectional shape both of the tyre and of the
chambers may be similarly modified and yet perform the same functions. The
composition of the pneumatic tyre may be of an ordinary character such as those
in ordinary us The tyre is cemented or otherwise secured or mounted upon the
wheel by any of the ordinary means.
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. In pneumatic wheel tyres the employment of chambers having valvular air
passages between them, in the manner described and illustrated.
2. In pneumatic wheel tyres the employment of valvular air passage between
two or more air chambers in the manner described and shown and for the purposes
specified.
3. The construction of valvular pneumatic wheel tyres in the manner herein.-|
belore described and illustrated in the accompanying drawings.
Dated this 4th day of Nov 1892
CHARLES T. POWELL.,
12, Cherry Street, Birmingham, Applicant's Agent.