Improvements in Tyres of Wheels for Bicycles, Tricycles, or other Road Vehicles.
Year: 1889

page_text: Date of Application, 1st Nov., 1889
Complete Specification Left, 1st Aug., 1890-Accepted, 6th Sept., 1890
PROVISIONAL SPECIFICATION.
Improvements in Tyres of Wheels for Bicycles, Tricycles, or
other Road Vehicles.
I ISAAC WATTS BOOTHROYD of 47 Farringdon Road in the County of Middlesex
Cycle Manufacturer do hereby declare the nature of this invention to be as follows:-
The ordinary rubber tyres for use for cycles and like vehicles are usually solid and
the protection from vibration thereby obtained is dependent on the elasticity of the
material employed.
Now by my present invention I provide a iyre of rubber or other suitable material
and which being hollow and divided into sections each containing a certain amount of
air more or less compressed by the weight of the vehicle and rider is more effective
lighter and capable of allowing such sections being individually removed and replaced
by others if desired without the necessity of replacing or renewing the whole of
the tyre.
Or I may form my tyre of a number of such hollow sections joined together in a
-continuous length by any suitable means.
It will be seen that 1 may either form my tyre of a number of short lengths
of hollow rubber closed at each end so forming small air chambers and fitting into
recesses provided in the rim or secured thereto by any suitable means-or I may
form my hollow tyre in one continuous length divided at intervals by an air tight
partition diaphragm or the like and so forming a succession of any desired number of
such air chambers placed end to end.
Or two or more of such air chambers may be formed in one length say to fit
a portion of the periphery of the wheel or rim.
If desired I may divide the metal rim transversely by means of partitions or
diaphragms into air tight compartments and cover the same with either hollow
or solid rubber or other elastic tyres.
Dated this 1st day of November 1889
POPPLEWELL & Co.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Tyres of Wheels for Bicycles, Tricycles, or
other Road Vehicles.
I ISAAC WATTS BOOTHROYD of 47 Farringdon Road in the County of Middlesex
Velocipede Manufacturer 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 :-
The ordinary rubber tyres in use for cycles and the like are usually solid and the
protection from vibration thereby obtained is dependent on the elasticity of the
material employed.
Now by my present invention I provide a tyre of rubber or other suitable material
which being hollow and divided into sections each containing a certain amount of air
more or less compressed by the weight of the vehicle and rider is more effective
lighter and capable of allowing such sections to be individually removed and replaced
by others if desired without the necessity of replacing or renewing the whole of the
tyre. Or I may form my tyre of a number of hollow sections joined together in
a continuous length by any suitable means.
It will be seen that I may either construct my tyre of a number of short lengths of
hollow rubber closed at each end forming small air chambers secured to the rim

page_text: by any suitable means or I may make my hollow tyre in one continuous length
divided at intervals by air tight partitions diaphragms or the like and so forming
a succession of any desired number of such air chambers placed end to end. Or two
or more such air chambers may be formed in one length say to fit a portion of the
periphery of the wheel or rim.
If desired I may divide the metal rin transversely by means of partitions or
diaphragms and cover the same with either hollow or solid rubber or other elastic
tyres.
Referring to the accompanying sheet of drawings and to the figures and letters of
reference thereon Figure 1 shows a longitudinal and Figure 2 a transverse section of
one method I may adopt in forming my improved hollow tyre and in this said method
where
I mould short lengths of hollow tyre or tubing of a section such as Figure
the thicker portion of the tyre A comes in contact with the running surface and the
thinner portion B is that which is secured to the rim the portion C being hollow or if
desired capable of being filled with liquid the ends of these short lengths are stopped
or closed by diaphragms or covers of rubber or other desirable material fastened by a
solution of rubber or by any suitable means. The sections of tube are arranged as to
length and number so as to exactly fit the circumference of the rim and are fastened
thereto by cement or by strips of canvas. or leather or by an outer wrapping of
canvas N or the like having its edges cemented or otherwise fastened to or round
the rim.
Figures 3 and 4 show another way in which I may secure my lengths or sections of
tube and in this arrangement I form a hole D or holes E E throughout the length of
the short tubes through which I may pass a wire or wires or leather or other cords F
on which the requisite number of short tubes with closed ends are strung and after
encircling the rim are tightly secured thereto by joining the ends of the wires or cords
cement being also used if found requisite.
Or I may provide a thin outer tubing of sufficient length to fit the circumference of
the rim and of a diameter to allow of the several sections of short tube with closed
ends to be inserted and pushed therein, the ends of, the outer tube being then joined
together forming a complete tyre which may then be secured to the rim in the usual
manner.
•
Figures 5 and 6 show another form of carrying out my invention by which the
short lengths of tube are moulded with a diaphragin G in the centre the ends H being
open (see Figure 5). The proper number of short lengths or tubes are then placed
together or joined by any well known means so forming a continuous tube or hollow
tyre with hollow cells or compartments J therein.
Figures 7 and 8 show a form of my hollow tyre divided into sections whereby the
whole of the tyre is moulded in one piece of the right length to fit the rim or in other
lengths from which the desired piece may be cut and in this form the divisions in the
rubber are open at the bottom or part K.
A thin strip K¹ of rubber or other material may then be cemented or otherwise
affixed over the openings and the whole secured to the rim of the wheel by any well
known means. Holes may be left for the process of manufacture in the ends
of sections when necessary and afterwards closed as will be well understood.
Figure 9 shows an arrangement by which a tyre such as M moulded in lengths
may be attached to a flat rim O.
In the foregoing specification atmospheric air has only been alluded to but it will
be seen that compressed air, liquids or gases may be used and forced into the cells if
found desirable.
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. In hollow rubber or like tyres for velocipedes and light road vehicles the
construction of such tyres in chambers or cells such chambers or cells being separated
from each other by partitions or diaphragms and capable of retaining atmospheric or

page_text: compressed air or fluids substantially as herein described and illustrated by the
accompanying sheet of drawings.
2. The construction of hollow tyres for velocipedes and light road vehicles by
means of joining together a number of segments or sections each forming a
complete chamber or cell such as shown in Figures 1, 2, 3 and 4 of the accompanying
drawings.
3. The construction of hollow tyres for velocipedes and the like by enclosing
segments or sections such as shown in Figures 1 and 2 within a continuous tube.
substantially as herein described.
4. The construction of hollow tyres for velocipedes and the like by joining together
a number of segments or sections such as shown in Figures 5 and 6 of the accom-
panying sheet of drawings such segments having a partition or diaphragın at or near
the centre and being joined together at the ends so forming a continuous tyre divided
into cells substantially as herein described.
5. The construction of a continuous hollow tyre for velocipedes and the like
divided into sections or cells by means of diaphragms or divisions moulded thereon or
therein as shown by Figures 7 and 8 the necessary tubular form and air or fluid
containing chambers or cells being attained by closing the bottom or rim portion K
by means of a thin strip K or by the flat top of the rim O (Figure 9) to which they
are secured.
•
6. The various methods of forming hollow tyres for velocipedes and light road
vehicles herein before described and illustrated by the accompanying sheet of
drawings.
Dated cols 1st day of August 19.
POPPLEWELL & Co.,
17 & 18, Southampton Buildings, London, W.C., Agents for the Applicant.