Improvements in the Tires of Cycles.
Year: 1891

page_text: Date of Application, 16th June, 1891
Complete Specification Left. 29th Aug., 1891-Accepted, 17th Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Tires of Cycles.
I WILLIAM THOMAS HALL of 1 Whitburn Terrace, South Shields in the
County of Durham, Schoolmaster do hereby declare the nature of this invention
to be as follows :—
The tire to consist of a core of steel wire similar to a spiral spring and about
2 inches in diameter. This steel core to be enclosed in canvas and rubber & to
be fastened to the rim by adhesion alone as in the solid tire or by the canvas being
reflected on to the inner part of the rim as in the pneumatic.
Dated this Thirteenth day of June 1891.
WM. THOS. HALL.
COMPLETE SPECIFICATION.
Improvements in the Tires of Cycles.
I, WILLIAM THOMAS HALL, of 1 Whitburn Terrace, South Shields, in the
County of Durham, Schoolmaster 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:―
My invention relates to improvements in the tires of cycles and consists in a
special arrangement or combination of parts having for its object elasticity of
action and durability in wear.
I attain this object by the use of a core of steel wire, similar to a spiral spring
traversing the circumference of the tire and enclosed by canvas and rubber.
The tire so constructed may be fastened to the rim by adhesion alone or by the
canvas being carried round onto the inner part or surface thereof.
I will fully describe my invention by reference to the accompanying drawings
in which
Figures 1 and 2 show cross sections and Figures 3 and 4 longitudinal sectional
elevations of cycle tires constructed in accordance with my invention and
throughout this description like letters indicate like parts in the Specification
and drawings.
Referring to Figs. 1 and 3 of the drawings, a is a best flexible round steel spring
wire arranged in the form of a spiral spring traversing the circumference of the
cycle tire. The spiral coil of wire may be floated or embedded in a solution of
india rubber a¹ of a thickness sufficient to enclose the wire coil in rubber and
subsequently wound or wrapped with a canvas covering a³.
Where however lightness is a special object, the canvas covering may be dispensed
with. a³ is an ordinary rubber tire about " thick overlying the rubber covered
coil or canvas which may be supplemented by the facing rubber a fitted in the
ordinary way as required. a' is the cycle rim into which the spokes are fitted.
Referring to Fig. 2, by a modification the rubber covered coil may be overlaid
by a facing rubber tire as (see Fig. 2) attached by rubber solution to the canvas
which may be bent or carried round to the inner part or surface of the rim where
it may be securely fastened by stitching or otherwise or the canvas may be used
as in Fig. 1 and facing tire attached by adhesion only or the canvas may be
dispensed with as before described where lightness is an object.
The flat
In Fig. 4, flat steel spring wire is shown similarly adapted for use.
spiral wire coil is to be treated for the purpose in a similar manner to the round
spiral wire coil, the specifications in respect of the adaptation and use of each

page_text: being similar. For racing purposes the spiral spring floated or embedded in rubber
of sufficient thickness can be used alone as a complete tire.
Generally speaking the pitch of the wire coiling may be about inch from the
t
centre of one ring to the centre of the next or contiguous ring but this may vary
for varying thicknesses or gauges of wire and for the diameter of the spiral.
A 1 inch diameter coil is a useful size.
The above method of constructing cycle tires gives great elasticity of action and
durability in wear.
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. The improvement in cycle tires consisting of the use of a spiral coil of round
or flat wire traversing the circumference of the tire and stiffened for practical work
by floating or embedding it in a sufficient thickness of rubber, substantially as and
for the purpose herein set forth.
2. The improvement in cycle tires consisting of the use of a spiral coil of round
or flat wire traversing the circumference of the tire and stiffened for practical
work by firstly floating or embedding it in a sufficient thickness of rubber, then
wrapping it in canvas and subsequently covering it with a simple rubber tire
or simple rubber tire and facing tire substantially as and for the purpose herein
set forth.
3. The improvement in cycle tires consisting of a light rubber tire embodying
a spiral coil or core of round or flat wire arranged and adapted for use as herein
described and claimed in Claims 1 and 2 and attached to the cycle rim either by
the adhesion of the tire itself or by securing it thereto by carrying the canvas
wrapping round the rim and securing it thereunder substantially as herein
set forth.
4. The combination of parts constituting the several improvements in cycle tires
substantially as herein set forth.
Dated this 28th day of August 1891.
A. CRAWHALL CHAPMAN,
3, St. Nicholas' Buildings, Newcastle-on-Tyne,
Patent Agent for Applicant.