Improvements in Elastic Tyres and Rims for the Wheels of Velocipedes and other Vehicles.
Year: 1896

page_text: Date of Application, 4th June, 1896
.Complete Specification Left, 4th Mar., 1897-Accepted, 1st May, 1897
OVISIONAL SPECIFICATION.
PROVIS
Improvements in Elastic Tyres and Rims for the Wheels of
Velocipedes and other Vehicles.
We, CHARLES ARTHUR CHAPMAN of Glenthorne, Horley, in the County of
Surrey, Gentleman, and WILLIAM HENRY CHAPMAN of 18 East Dulwich Road,
East Dulwich, in the County of Surrey, Licensed Victualler, do hereby declare
the nature of this invention to be as follows:-
According to this invention the rim is trough shaped and has springs stretched
across it at intervals to support the tyre out of contact with the bottom of the
trough.
The two sides of the trough are vandyked the springs being at the bottoms of
the V shaped notches whilst the points serve to keep the tyre in place.
The tyre is formed of a helical coil of wire braided over with thread or the like
and covered with indiarubber or preferably a mixture of rubber and cork dust.
Dated this 3rd day of June 1896.
C. A. CHAPMAN.
W. H. CHAPMAN.
Improvements in Elastic Tyres and Rims for the Wheels of
Velocipedes and other Vehicles.
We, CHARLES ARTHUR CHAPMAN, of Glenthorne, Horley, in the County of
Surrey, Gentleman, and WILLIAM HENRY CHAPMAN, of 18 East Dulwich Road,
East Dulwich, in the County of Surrey, Licensed Victualler, 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 :-
According to this invention, the rim is trough shaped, and has springs of any
suitable material stretched across the said trough upon which the tyre proper is
placed or suspended.
In order that our invention may be the better understood, we will proceed to
describe the same with reference to the drawings hereto appended.
Fig. 1. is a side elevational view of a wheel with. a, tyre, constructed according to
this invention.
Fig. 2. is a transverse section of the rim and tyre shewing the arrangement of
the spring.
Fig. 3. is a sectional plan, also,, shewing the arrangement of springs and the
tyre.
Fig. 4. is a transverse section of another form of rim and tyre.

page_text: Fig. 6. is a longitudinal section shewing more clearly the construction of the
tyre and arrangement of springs.
Fig. 7. Sheet 2. shews a method of securing the segments composing the tyre
one to another.
Fig. 8. is a transverse section of another form of rim and tyre, and
Fig. 9. is a longitudinal section of Fig. 8..
Referring to Figs. 1, 2, and 3. A. is the rim of the wheel which may be of wood
and has a channel or trough B. formed in the outer circumference thereof. The
walls of the channel are perforated at suitable intervals, as indicated at C. and
have threaded therethrough a rubber cord D. A recess or groove D is formed
upon the outside of the rim on both sides to receive the cord D. to protect which
from injury metal rings E. E' are provided and may be secured to the rim by
means of screws or the like.
Within the channel B. is placed the annular ring forming the tyre which may
be of wood or metal or a combination of wood and metal, wood and rubber, or
metal and rubber, or any other suitable material, as may be found most suitable,
and the tread of the tyre may be of any desired outline, and the ring aforesaid may
be built up of two or any number of segments.
At distances corresponding to those in the rim are drilled or otherwise formed in
the ring, a number of holes F. through which is threaded the cord D, the ring thus
being as it were suspended within the channel B. To allow of the free vertical
movement of the tyre, the holes F. aforesaid are enlarged at the sides of the tyre
as shewn, the object being to prevent the cord jamming between the tyre and the
walls of the channel.
It will be seen from the drawings that the channel is of a somewhat greater
depth than the enclosed portion of the tyre to allow the same to move vertically
when the weight is placed upon the wheel. A groove G. is formed at the bottom
of the trough to receive the heads or nipples for the spokes. The ends of the cord
are secured as shewn at H. Fig. 3. from which it will be seen that the rubber when
cut or broken will resume its normal thickness, thereby forming a natural head or
stop, and leaving adjoining portions of the cord unaffected and intact, and
preventing the cord from being withdrawn, as shewn enlarged at T¹ Fig. 3. It is
obvious that the same action will take place in the event of the cord breaking, and
thus prevent any loosening or collapse of the tyre.
The
In Fig. 4. is shewn a section of a rim I. having instead of holes a series of
internal hooks J. at suitable intervals. These hooks may be formed in any suitable
manner such as stamping, or they may be afterwards inserted in the rim.
cord D. in this case is passed over the hooks as shewn in Fig. 5. and the tyre is
provided upon its inner periphery with a series of projections K. Fig. 6. which
engage with the cord and prevent the tyre "creeping" or otherwise becoming
displaced, or the projections may have circular grooves at the ends to engage with
the cord D.
In Fig. 7. Sheet 2. is shewn a method of securing the ends of the segments
forming the tyre one to another, the two portions L. L' engaging with corresponding
recesses M. Ma bolt and nut N. N' securing the whole together, and the recesses
formed for the nut and bolt head.
Referring to Figs. 8 and 9 the tyre in this case is supported upon the cord D. as
shewn. The rim O. has slots P. cut therein, indicated by dotted lines, and a
projection Q. formed upon the outside of the rim on both sides, the cord coming in
contact with the projections, which thereby retains the same in position. To limit
the movement of the tyre, the cord D. is retained by means of the two rubber
bands R. R running round the tyre upon the inner periphery and secured at
intervals, as shewn. Metal rings S S are provided and serve to keep the rubber
cord in the slots P.
the
In the case of the rim shewn in Figs. 2 and 4 one side of the rim may be moveable,
tyre in this case would be solid and slipped on to the rubber. The tyre shewn
in Figs. 4, 5, and 6 and having projections, would be used.

page_text: Having now particularly described and ascertained the nature of our said inveu-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. In an elastic tyre for velocipedes and other vehicles, the use of a rubber cord
in a state of tension, in combination with a tyre composed of any suitable material,
substantially as described and shewn in the accompanying drawings.
2. In an elastic tyre for velocipedes and other vehicles, as above described, the
combination of a rim having a central trough and perforated to receive a stretched
rubber cord with a tyre of any suitable material also perforated and supported by
the cord above referred to, all substantially as described and shewn in the
accompanying drawings.
3. In an elastic tyre for velocipedes and other vehicles, the use of a rim of any
suitable material, having a central channel and internal hooks, or eyelets, to
receive a rubber cord, in combination with a tyre of any suitable material having
projections formed upon the inner periphery, as described and shewn in the
accompanying drawings.
4. In an elastic tyre for velocipedes and other vehicles, the use of a rim of any
suitable material, having a central channel and slots formed in the sides of the said
channel to receive a rubber cord, and lugs upon the outside to retain the same, in
combination with a tyre of any suitable material, supported upon the cord and
retained in position by.means of other cords of rubber, substantially as described
and shewn in the accompanying drawings.
f March 1807
J. E. EVANS-JACKSON & Co.,.
Agents for the Applicants.