Improvements in or connected with Pneumatic Tyres for Velocipedes.
Year: 1892

page_text: Date of Application, 15th June, 1892
Complete Specification Left, 15th Mar., 1893-Accepted, 22nd Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in or connected with Pneumatic Tyres for
Velocipedes.
I, WILLIAM EDWARDS, of 260 Victoria Dock Road, in the County of Essex,
Wine and Spirit Merchant, do hereby declare the nature of this invention to be as
follows:
:-
My invention refers to pneumatic tyres, in which there is always, as they are
now made, a sucking action produced as they travel over the road or track.
The object of my invention is so to construct such tyres that there shall be a
sufficient air space left between the running surface of the tyre and the road or
track on which the velocipede travels, as to obviate or minimise this sucking or
dragging action. According to my invention, I make the running surface of the
tyre more or less undulating or corrugated, in such manner that all round the
running surface of the tyre there are produced a series of projections more or less
deep, whereby the wheel as it travels round is supported on the apexes as it were of
the corrugations, the space between each projection forming an air space between
the road or track and the tyre. The corrugations are formed on or with the
external surface of the outer covering of the pneumatic tyre to which the invention
is applied.
1
1
CT
1000
BREWER & SON,
33, Chancery Lane, London, Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in or connected with Pneumatic Tyres for
Velocipedes.
I, WILLIAM EDWARDS, of 260 Victoria Dock Road, in the County of Essex,
Wine and Spirit Merchant, 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
My invention refers to pneumatic tyres wherein there is, as now made, a sucking
invention
action produced as they travel over the road or track. The object of
is to remedy this defect, so that there shall be a sufficient air space left between
the running surface of the tyre and the road or track on which the velocipede
travels to obviate or minimise this sucking or dragging action, and at the same time
increase the resiliency of pneumatic tyres. For this purpose I make the running
surface of the tyre with a series of projections or undulations, each extending at
right angles to the plane of the wheel, and at regular intervals apart around the
entire wheel, whereby the wheel as it travels, bounds as it were, from one projection
to another, the space between each projection forming an air space between the road
or track and the tyre.
The projections are formed on or with the external surface of the outer covering
of the pneumatic tyre to which the invention is applied.
The accompanying drawings illustrate how my invention may be carried into
effect.
Fig. 1 is a longitudinal vertical section ;
Fig. 2 is a transverse section on the line X Y of Fig. 1 of a pneumatic or air
pressure wheel tyre with my improvements applied thereto according to my
invention, the tyre so shewn being the so called "Heale" tyre, and
Fio 3 is a plan view of one part of Fig. 1.

page_text: A A are the undulations or projecting portions, formed according to this
arrangement in a piece with the outer envelope B of the tyre, and extending around
the tyre transversely to the circumference thereof, or of the plane of the wheel, and
as best seen at Figs. 2 and 3. C is the canvas case, and D is the indiarubber air
tube; E is the metal felloe, and F is the gripping canvas.
Fig. 4 is an elevation, partly in section, and Fig. 5 a transverse section on the
line XY of Fig. 4 shewing an air pressure tyre of a type commonly known as the
"Dunlop," having undulations or projecting parts formed thereon according to my
invention.
In this example I form the projections or undulations of the outer envelope B by
means of pieces of material A* of suitable shape and form, inserted beneath the
envelope B, that is, between the inner air tube D with its canvas covering, and the
envelope B, so that when the tyre is inflated, the inserted pieces A* will produce
projecting parts A. of a shape approximating to the shape of the pieces Ax; these
latter may be formed of cork, rubber, or other suitable substance, may be hollow or
solid, and may in some cases be fixed to the canvas covering of the air tube D.
I am aware that it has been heretofore proposed to serrate or undulate elastic
wheel tyres lengthways of same to prevent side slipping of the wheel, such tyres
having been patented by "Hancock," No. 4140, A.D. 1879; and I am also aware
that it has been proposed to provide projections diagonally of the tyre for pre-
venting skidding, such having been patented by "Jordan," No. 17152 A.D. 1891;
but I obtain advantages beyond the device of the latter inventor, in that by
my invention the sucking action of the so-called pneumatic or air-pressure tyres
is entirely prevented, and the projecting parts, when arranged, or arranged and
constructed according to my invention, greatly increase the resiliency of the tyres,
without appreciable increase of weight, for which purpose I produce the herein-
before described pneumatic tyre having projecting parts on its running surface,
each part extending at right angles to the plane of the wheel and at regular
intervals, say of 1 to 3 inches apart, as shewn in the drawings, around the entire
wheel tyre, these projecting parts being harder than the major surface of the tyre,
for, firstly, preventing the sucking action such tyres have when on the road, and
secondly, so that when the wheel is running on the road it will bound or jump from
one lump to the next, and thereby cause the spring action of the tyre to be more
effective.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
1. In pneumatic tyres for velocipedes, forming the external surface or tread
thereof into, or providing same with, a number of projecting parts, each extending
at right angles to the plane of the wheel and at regular intervals, say of 1 to 3 inches
apart, around the entire wheel, whereby any sucking action of the tyre upon the
road is prevented, and the spring action increased, all substantially as set forth.
2. In pneumatic tyres for velocipedes, forming the external envelope, or the
external layer of an air-pressure tyre, with projections extending at right angles to
the plane of the wheel and at intervals apart throughout the tread thereof, by
forming the said projections or the like of harder material than and in a piece with
the said envelope or external layer substantially as described.
3. In pneumatic tyres for velocipedes, producing projections at intervals upon the
external surface or tread of an air pressure tyre, each projection being at right
angles with the plane of the wheel, by the insertion, beneath the outer covering or
envelope of the tyre, of pieces of suitable material substantially as and for the
purposes herein set forth."
Dated this 101 1
C