Improvements in and relating to Pneumatic Tyres.
Year: 1893

page_text: Date of Application, 29th Sept., 1893
Complete Specification Left, 29th June, 1894-Accepted, 1st Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
I, HENRY JELLEY, of 27 Malva Road, Wandsworth, in the County of Surrey,
Cycle Manufacturer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to an improvement in pneumatic tyres having for its object
the prevention of side slip, and it consists in placing at or about the centre of the
width of the tyre a restricting band, preferably in the form of a round wire, or
cord, of a diameter so much smaller than the peripheral diameter of the tyre, that it
will cause the tyre when inflated to assume somewhat the shape of the top part of a
heart, i.e., with a central depression and two curved surfaces on each side, so that
the periphery of the tyre has two running surfaces or treads which will be found to
entirely prevent side slipping.
The restricting band may be either made endless in the form of a hoop or ring
or it may be provided with any suitable device for varying its circumferential length,
and it may be either applied to the exterior of the cover of the tyre, to the interior
thereof, or it may be moulded or formed as part of or in the cover. It may also be
placed loosely within the outer cover or over the air tube, or if a canvas tube or
pocket is used it may be placed over the said tube or pocket. I prefer to
permanently attach this restricting band to either the outer cover or to the canvas
tube or pocket if such is used, which I do by placing it in a pocket formed on or by
a strip of canvas which may be cemented or otherwise fixed to the outer cover or
to the canvas tube or pocket.
I do not limit myself to any particular method of applying or attaching this
restricting band, or to the type of tyre to which it is applied as it can be applied to
all known types of pneumatic tyres.
In new tyres it may be found preferably to mould the cover of the exact shape
it will assume when inflated so that there is no extra strain thrown on the cover
when its outer expansion is restricted. I also prefer to make the cover slightly
conical at the points forming the tread or running surfaces.
Dated this 29th day of September 1893.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and relating to Pneumatic Tyres.
I, HENRY JELLEY, of 27, Malva Road, Wandsworth, in the County of Surrey,
Cycle Manufacturer, 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 an improvement in pneumatic tyres, and it consists in
placing at or about the centre of the width of the tyre a restricting band of a
diameter so much smaller than the peripheral diameter of the tyre that it will cause
the tyre when inflated to assume a shape somewhat similar to the top part of a heart
i.e., with a central depression and two curved surfaces one on each side, thus forming
FD077

page_text: two treads or running surfaces, the object being to prevent side slipping of the tyre
on wet and greasy roads.
The one great defect of all pneumatic tyres is that through the increased area of
contact with the ground the tyres on wet and greasy roads float on the top of the
mud and grease and do not get a bearing through on to the hard surface beneath
giving rise to what is known as "side-slip" which is a constant source of danger to
the rider. Many attempts have already been made to prevent this "slide-slip "
but none up to the present time have been completely successful. The past known
devices already used to attain this end consists of ribs or projections formed on or
fixed to the tread or wearing surface of the tyre, the said ribs or projections being
arranged in many different ways but none of them have proved successful in
entirely preventing "side slip" at the same time having the disadvantage that they
to a great extent reduce the resiliency of the tyre.
Now by the use of my invention a form or shape is given to the tread or wearing
surface of the tyre which entirely prevents side slipping and that without reducing
or interfering in any way to the resiliency of the tyre.
In the accompanying drawing which illustrates my invention:-
Figure 1 is a view in transverse section of one of the many known types of tyre
in its present form, and
Figure 2 is a view in transverse section of the same tyre having the restricting
band applied to it.
Figure 3 is a view in transverse section showing the application of my invention
to a tyre of the solid wall type.
Figure 4 is a view in transverse section showing a complete tyre of the double
tube type constructed according to my invention.
Figure 5 is a broken view showing how the pocket may be made in the reinforcing
fabric for the restricting band, and
Figure 6 is a view in transverse section of a special form of air tube that may be
used.
Throughout the views similar parts are marked with like letters of reference,
and the types of tyre illustrated are merely given by way of illustration, as my
invention is applicable to all known constructions of tyres.
According to my invention I fit or apply the restricting band A to the cover B
of the tyre which may be of any suitable construction and fixed to the wheel rim X
by any of the well-known methods. The restricting band A may be either made
of wire, leather, vulcanite, stranded wire cord, or any other suitable material or
substance but if it is made of metal it is preferably covered by a protecting strip
of vulcanite or enamel to protect it. I only prefer to place the restricting band on
the outside of the cover as shown by Figure 2 when applying my invention to tyres
already in use, but in applying my invention to tyres during the course of
manufacture I prefer to place the restricting band A in the thickness of the tyre.
If the tyre is of the solid wall type the restricting band A may be placed in a
recess in the cover and covered by the reinforcing fabric C as shown by Figure 3,
and when the tyre is of the double tube type the restricting band A may be placed
between the outer cover B and the reinforcing fabric C as shown by Figure 4, or
it may be placed in a pocket c formed for the purpose in the reinforcing fabric as
shown by Figure 5 whether the said reinforcing fabric consists of a lining for the
cover or of an independent tube or pocket. The restricting band A may if desired
be made adjustable in. its circumference by means of a right and left handed nut or
equivalent device.
In constructing new tyres fitted with my invention I prefer to so mould or shape
the cover that it has an increased thickness on each of its treads or running surfaces
as shown by Figures 3 and 4, and I prefer to mould or form the air tube D to a
shape approximate to the form it has to assume as shown by Figure 6.
I wish it to be particularly understood that I do not limit myself to the precise
method of carrying my invention into effect as hereinbefore described and illustrated

page_text: by the accompanying drawing, but that I hold myself at liberty to carry it out in
any other manner within the spirit and scope of my invention.
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. The improvement in pneumatic tyres substantially as hereinbefore described.
and illustrated by the accompanying drawing.
2. A pneumatic tyre having a single central inextensible band or its equivalent
adapted to prevent the outward expansion of the tyre at its centre to cause it to
assume a divided shape and form a double tread or running surface as and for the
purpose set forth.
3. A pneumatic tyre having a single air tube or chamber and a double tread or
running surface constructed arranged and operating as and for the purpose set
forth.
4. In a pneumatic. tyre, producing two treads or running surfaces by restraining
the outward expansion of the tyre at the centre of its width, by means of a
restraining band such as A or its equivalent, the diameter of which is less than the
diameter of the tyre at its periphery, the said restraining band or its equivalent
being placed either outside the cover of the tyre or within the cover, as set forth.
Dated this 20th dow of June 1891
ROBERT E. PHILLIPS, M.I.M.E,,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.