Improvements in connection with Pneumatic Tyres for Bicycles, Tricycles, Carriages, and other Road Vehicles.
Year: 1894

page_text: Date of Application. 7th June, 1894
Complete Specification Left, 7th Mar., 1895-Accepted, 13th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in connection with Pneumatic Tyres for Bicycles,
Tricycles, Carriages, and other Road Vehicles.
I WILLIAM PURDON of 5 Lambert Street in the City and County of Hull do
hereby declare the nature of this invention to be as follows:-
The object of my invention is to provide a wearing surface or external tyre for
the pneumatic rubber tyre tube of cycles, carriages and other road vehicles; which
external tyre shall not only take the wear, but act as a protection to the rubber
tube against puncture, cutting, or other damage to which the ordinary rubber air
tube is liable when in use.
My invention consists in surrounding the external part of the rubber air tube with
a thin steel or other metal tyre, such metal tyre covering approximately one-third of
the sectional circumference of the rubber tube and being curved to correspond.
When the rubber tube is inflated, the metal tyre is therefore held securely in
position without any tendency to slip off, and without any necessity for further
means for securing it in position, and it fully protects that portion of the rubber
tyre which would be liable to damage.
The curved metal tyre may be provided with an internal rib to strengthen
it, and the rubber tube formed with a corresponding groove round its outer
circumference, and such arrangement forms a still further security against the metal
tyre coming off. Also the sides or edges may be curved slightly inwards.
Should it be desired to have the metal tyre more elastic or flexible, I propose to
make it in short pieces or lengths, and connect these together to form a rim by
means of hinge connections on the inner (non-wearing) side. Such an arrangement
may be very conveniently constructed by providing the pieces with an internal rib
or ribs, one end of which may be formed as a fork, so that the single pieces or
lengths are connected by fork pin-joints. Or the separate pieces may be connected
by a stud and slot arrangement.
My invention is applicable to carriages or other road vehicles, in which case the
section of the rubber tube is not necessarily circular, but may be made
approximately rectangular, in which case the section of the metal tyre will be made
to correspond.
When the metal tyre is made in short lengths the pieces are preferably made so
as to overlap slightly.
Dated this 6th day of June 1894.
J. CLARK JEFFERSON,
2, East Parade, Leeds, Agent for Applicant.

page_text: Improvements in connection with Pneumatic Tyres for Bicycles,
Tricycles, Carriages, and other Road Vehicles.
I WILLIAM PURDON of 5 Lambert Street, Hull in the County of Hull,
Commercial Traveller, 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 object of my invention is to provide a wearing surface or external tyre for
the pneumatic rubber tyre tube of cycles, carriages and other road vehicles, which
external tyre shall not only take the wear, but act as a protection to the rubber
tube against puncture, cutting or other damage to which the ordinary rubber air
tube is liable when in use.
My invention consists in surrounding the external part of the rubber air tube
with a thin steel or other metal tyre, such metal tyre covering approximately
one-third of the sectional circumference of the rubber tube, and being curved to
correspond. When the rubber tube is inflated, the metal tyre is therefore held
securely in position without any tendency to slip off, and without any necessity for
further means for securing it in position; and it fully protects that portion of the
rubber tyre which would be liable to damage.
The curved metal tyre may be provided with an internal rib to strengthen it, and
the rubber tube formed with a corresponding groove round its outer circumference,
and such arrangement forms a still further security against the metal tyre
coming off.
My invention is applicable to carriages or other road vehicles, in which case
the section of the rubber tube is not necessarily circular, but may be made
approximately rectangular, in which case the section of the metal tyre will be made
to correspond.
I
When it is desired that the running of the cycle shall be absolutely noiseless,
arrange to fix a cushion tyre of smaller diameter to the outside of the metal tyre,.
conveniently crescent or gibbous in section, and secured in position by means of a
pair of metal ribs formed on the outside of the exterior metal tyre.
And in order that my invention and the mauner in which the same is to be
performed may be more readily and clearly understood, I have annexed hereto the
accompanying drawings in which :-
:―
Fig. 1 shows the simplest form of carrying out my invention, in this a is the
inflated rubber air tube, b is the internal rim carried by the spokes of the wheel,
whilst c is the protective exterior metal tyre, covering approximately one fourth to
one third of the sectional perimeter or circumference of the rubber air tube; which
owing to the inflation, the rubber air tube and the curved section of the rim (c) is
held securely in position without further attachment.
Fig. 2 illustrates my invention in which an internal metal rib d is formed on the
exterior metal rim c for strengthening purposes, and which serves as an extra
security against slipping of the tyre c. The rubber air tube is also preferably
moulded with a recess to correspond to the rib d.
Fig. 3 shows the metal rim c provided with two external ribs e, e, to secure an
exterior cushion tyre in position, for the purpose above mentioned.
Fig. 4 is a combination of the design of Figs. 2 and 3, whilst
Fig. 5 illustrates my invention in a form more suited to road carriages and vehicles
than those previously illustrated.
It will be understood that I do not limit myself merely to the above forms of
carrying out my invention, which are intended as stated merely as illustrations.

page_text: 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. A pneumatic tyre for cycles and other road vehicles comprising a rubber air
tube and an exterior metal tyre curved in section to correspond to and to cover
approximately one third the sectional circumference or perimeter of the rubber
air tube, whereby on inflation of the latter the metal exterior tyre is securely held
in position.
2. A pneumatic tyre for cycles constructed substantially according to Claim 1,
and having the exterior metal tyre formed substantially according to any of the
modifications herein set forth, and illustrated in Figs. 1 to 4.
3. A pneumatic tyre for road carriages and other vehicles constructed substan-
tially as herein set forth and illustrated in Fig. 5.
4. My improved pneumatic tyre for cycles, road vehicles, and the like
substantially as herein described and with or without an exterior cushion tyre for
the purpose set forth.
Dated this 6th day of March 1895.
J. CLARK JEFFERSON,
2, East Parade, Leeds, Agent for Applicant.