A New and Improved Tyre for Cycles and the like.
Year: 1894

page_text: Date of Application, 8th May, 1894
Complete Specification Left, 7th Mar., 1895-Accepted, 8th May, 1895
PROVISIONAL SPECIFICATION.
A New and Improved Tyre for Cycles and the like.
We, GEORGE WILLIAM PRIDMORE Designer and THOMAS JOHN STURGEON,
Art Metal Worker, both of 2 Broad Street Buildings, in the City of London,
do hereby declare the nature of this invention to be as follows:-
This invention consists of a new and novel arrangement for a pneumatic tyre.
In this our invention we take, say, a metal tube of any suitable dimension, and
of any section, the said tube being bent round, to the ordinary shape of the wheel.
This said metal tube is filled with air, and hermetically sealed so as to give
a great amount of elasticity.
Over this tube, we propose to place a covering of indiarubber of any section in
order to prevent the tube coming in contact with any hard substance.
Dated this 7th day of Mar 1894
GEORGE W. PRIDMORE.
THOS. J. STURGEON.
New and Improved Tyre for Cycles and the like.
We, GEORGE WILLIAM PRIDMORE, Designer, and THOMAS JOHN STURGEON,
Art Metal Worker, both of 2 Broad Street Buildings, in the City of London,
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 relates to a new and improved tyre for cycles and the like and
consists in the employment of a metal tube of any suitable cross section and made in
the form of an annulus of the requisite diameter for affixing to a wheel-rim. When
the tube is of very thin metal it may be permanently filled with air under pressure
which would give additional strength to the tyre and assist in overcoming any
tendency of its collapsing when subjected to the weight of the rider and to shocks when
running.
We cover the tube with indiarubber or other suitable material of any desired
thickness and shape in cross section, said cover serving to prevent the tube becoming
dented by striking against stones or similar impediments on the road and also
serving to give resiliency to the tyre. If desired and in order to increase the
resiliency we may interpose between the tube and the outer cover an envelope of
soft rubber or other flexible material, or a winding of elastic thread cord or ribbon.
In order that our said invention may be clearly understood and readily carried
into effect we will describe the same more fully with reference to the accompanying
drawings in which
Figures 1, 2,
and 4 represent cross-sections of several tyres constructed
in accordance with our invention.
Figures 5, 6 and 7 are sectional perspective views shewing methods of attaching
the tyres to the rims of wheels.

page_text: Figure 8 is detached view of a pin or key for use in connecting the tyre to the
wheel-rim as hereinafter explained.
A is the metallic tube, B the cover of india-rubber or other suitable material
surrounding it, C the intervening envelope or winding of rubber or other flexible
material, and D the rim of the wheel.
In Figures 1 and 2 the tube A is circular in cross-section, in Figure 3 it
is plano-convex and in Figure 4 it is corrugated. We do not however confine
ourselves to these sections as it is obvious that such can be varied to suit the
requirements of individual manufacturers or to suit the particular construction of
wheel-rims to which the tyres are to be applied.
In the production of our improved tyres we first take a suitable length of steel, or
other metallic tube of the desired section, and after bending or forming it into
circular form secure the two ends together thereby producing a hollow ring or
annulus. Or said hollow ring or annulus may be produced in any other advantageous
manner. We then take a length or strip of elastic material C such as india-rubber
and fold it around the tubular annulus by bringing its opposite longitudinal edges
together at or about the point marked c; the inner surface of the said elastic strip
having been previously coated with any suitable adhesive substance. Instead of
applying this elastic material in the form of a strip as above stated we may employ
continuous lengths of elastic thread cord or ribbon and apply the same by winding it
around the said tubular annulus. We then take a length of vulcanized india rubber
which may be so made that it naturally assumes a shape more or less conforming
to the sectional contour of the tubular annulus. The inner surface of this length of
vulcanized india-rubber may be coated with adhesive substance and is applied to the
before mentioned elastic envelope or winding C by bringing the longitudinal edges
together at or about the point marked b. The vulcanized india-rubber cover having
been applied the tyre is then ready for attachment to the wheel-rim. If desired
instead of making the cover B of the same thickness throughout as shewn in Figure 1
we may increase the thickness of the tread portion (see Figure 3) as is well
understood by cycle-tyre manufacturers.
The tyres shewn at Figures 2 and 3 are produced in a similar manner to that
above described.
Instead of employing a plain tube A as shewn in the preceding figures we may
if found advantageous employ a corrugated tube as shewn at Figure 4 in order to
give additional strength thereto. In this case the cover B may be moulded to a
corresponding form.
In order to attach the tyre to the wheel-rim we may employ a rim having straight
edges d as seen in dotted lines at Figure 5 and after applying the tyre to the rim,
bend these edges into the position illustrated by the full lines in this figure. The said
edges will thus clasp the tyre and thereby keep it attached to the rim.
Or the rim may be made with corrugated edges d¹ terminating in inclined
flanges as shewn at Figure 6, and the outer cover B of the tyre be formed with a
flattened or corrugated portion b¹ having inclined shoulders 62. The tyre could then
be attached to the rim by squeezing the flattened or corrugated portion b¹ between
the inclined flanges d' of the rim. If desired the said flattened or corrugated
portion may be covered with adhesive solution prior to its attachment to the rim.
Or the tubular acnulus A may be provided with screwed bosses a (Figure 7) at
suitable intervals for the reception of thumb screws a' which are inserted in place
by passing their screwed ends through openings formed in the wheel-rim and in the
cover B and envelope C, the position of said openings corresponding with that of the
screwed bosses a when the tyre has been properly applied to the rim.
Instead of employing thumb screws a¹ we may form the tyre and the rim with
slots through which the tee ends a² of the pins or keys a³ (Figure 8) can be
inserted. By turning said pins, after their insertion, so that their tee ends lie at
right angles to the said slots an effectual connection of the tyre to the rim could be
effected.

page_text: The outer cover B is preferably provided with an internal lining of canvas of the
ordinary kind.
We would here state that although we have shewn several ways of attaching our
tyre to the wheel-rim we do not wish to confine ourselves only thereto, as any other
method may be employed if found more convenient, the mode of attaching the tyre
to the rim forming no part of our present invention,
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that
what we claim is :-
1. A new and improved tyre, for cycles and the like, consisting of a hollow metallic
annulus provided with an india-rubber or other suitable cover substantially as
described and for the purpose specified.
2. A new and improved tyre for cycles and the like consisting in the combination,
substantially as described, of a hollow metallic annulus, of a flexible envelope or
winding around said annulus, and of an external protective cover.
3. Our new and improved tyre for cycles and the like constructed substantially
as described with reference to the accompanying drawings and for the purpose
specified.
Wated this 6th day of March 1895.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.