Improvements in Pneumatic Tyres for Bicycles, Tricycles, and Road Carriages.
Year: 1892

page_text: Date of Application, 12th May, 1892
Complete Specification Left, 17th June, 1892-Accepted, 23rd July. 1892
PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Tyres for Bicycles, Tricycles, and
Road Carriages.
We, ARTHUR MCDOUGALL, India Rubber Manufacturer, and DENNIS
CARROLL Manager, both of Holland Street, Pendleton, in the County of
Lancaster do hereby declare the nature of this invention to be as follows:-
This invention relates to pneumatic tyres, such as are employed on bicycles,
tricycles and the like, and the object of this invention is to protect the air tube,
which in ordinary forms of pneumatic tyres is formed separately from the outer
covering, from injury or destruction caused by friction on the edges of the rim of
the wheel, or from the ends of spokes projecting more or less beyond the surface
of said rim.
We attain this object by the means hereinafter described and as illustrated in
the accompanying sheet of drawings.
In the views therein shown, similar letters refer to similar parts.
In this invention we fold or double a piece of canvas or like material so as to
form a cover as shown in section in Fig. 1. which represents said cover ready to
be applied to the rim a of a wheel, and enclosing an air bladder or pneumatic tubev,
non-inflated..
In order to form this cover we employ two thicknesses of canvas, or like
material.
By reference to Fig. 1 it may be readily understood, if commencing at the edge
of the canvas at the point d the line is followed in the direction of the arrows to
the point e, when the fabric is doubled back and passes round to the point f where
it is again doubled back and finally terminates at g.
Another piece of canvas.commencing at d' is placed on the outside and carried
round so as to terminate at g'. The two pieces of canvas aforesaid are coated with
rubber and vulcanized or solutioned together, and if preferred the folds of the
inner canvas may be stitched at h and h.
The cover which we thus form we attach to the rim of the wheel as shown in
Fig. 2 by means of the flaps j, j', which we either cement to said rim, or secure by
hooks, buttons or the like, or by clinching one surface of one of said flaps against
the other, when the air tube b. may be inflated in the ordinary manner.
As an additional means of protection from injury caused by friction or the
protruding ends of spokes we may insert between the flaps k, k', and the rim a of
the wheel, either cork, leather, india rubber or other suitable substance.
By these means if from any cause it is required to obtain access to said inner
bladder or air tube b, the cover herein before described may be readily opened at
any part or entirely detached without mechanical appliances being required, and
may be as readily replaced.
Any preferred thickness of india rubber c may be employed as a wearing
surface for the herein before described cover.
✔

page_text: COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres for Bicycles, Tricycles, and
Road Carriages.
We ARTHUR MCDOUGALL India Rubber Manufacturer and DENNIS
CARROLL, Manager both of Holland Street Pendleton in the County of
Lancaster 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 pneumatic tyres such as are employed on bicycles,
tricycles and the like, and the object of this invention is to protect the air tube,
which in ordinary forms of pneumatic tyres is formed separately from the outer
covering, from injury or destruction caused by friction on the edges of the rim of
the wheel, or from the ends of spokes projecting more or less beyond the surface of
said rim.
:
We attain this object by the means hereinafter described and as illustrated in
the accompanying sheet of drawings. In the several views therein shown similar
letters refer to similar parts.
Fig. 1 is transverse section of an air tube
accordance with this invention.
cover
or protector made in
Fig. 2 is a transverse section of the same with an air or pneumatic tube placed
within, and said outside cover encircling the rim of the wheel and in position for
attachment thereto either by lacing cementing or otherwise affixing the upper laps.
Fig. 3 shows a transverse section of a tyre formed in accordance with this
invention with the air tube inflated.
Fig. 4 represents a side view of portion of a wheel and tyre showing the means
whereby access may be obtained to any portion of the air tube.
In this invention we fold or double a piece of canvas or other suitable material
so as to form a cover as represented in section in Fig. 1.
Our invention may be readily understood by reference to Fig. 1, if com-
mencing at the edge of the fabric at the point x, the line is followed in the
direction of the arrows to the point a¹, when the material is doubled back and
passes round to the point where it is again doubled back and carried forward
to the end. At this point the fabric may either be doubled back round the
outside and terminate at x, or a separate piece of suitable material may commence
as shown at d¹ in Fig. 1, on the drawing accompanying the Provisional
Specification, so as to terminate at that point.
The two pieces of canvas aforesaid are coated with rubber and vulcanized or
solutioned together, and if preferred the folds of the inner canvas may be
stitched at h and h¹.
The cover which we thus form we attach to the rim of the wheel as shown
in Figs. 2 and 3, by means of the flaps j, j, which we either cement to said
rim or to one another, or to rim and one another, or secure by hooks, buttons
or the like, or by clinching one surface of one of said flaps against the other,
when the air tube b may be inflated in the ordinary manner.
By these means the flaps k and will not be detached and separated at h
and by the action of the edges of the rim a, and if from any cause it is
required to obtain access to the inner bladder or air tube b, the cover v herein
before described may be readily opened at any part as shown in Fig. 4 or
entirely detached without mechanical appliances being required and may be as
readily replaced.
As an additional means of protection from injury caused by friction or the
protruding ends of spokes, we may insert between the flaps k, k', and the rim a of
the wheel, either cork, leather, india rubber or other suitable substance.
Any preferred thickness of india rubber may be employed as a wearing surface c
for the herein before described cover.

page_text: We desire it to be understood that we do not claim the use of flaps that may
be attached to the inside of the cover for lining the rim of a tyre either internally
or externally, or the use of additional material placed between said flaps and the
rim, or the means whereby the cover may be attached to the rim of a wheel,
but
Having now particularly described and ascertained the nature of this our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
In a covering that is employed for placing on or over an air tube so as to
form a pneumatic tyre for the wheels of bicycles, tricycles and road carriages, the
manner of forming flaps such as k and k¹ by folding or doubling the fabric so
that said flaps and the inner of the two layers of fabric forming the covering
may be made from one piece of material, in the manner and for the purpose
substantially as herein before described.
Dated this 16th day of Inna 1800
THOMAS PRESCOTT,
53, Arcade Chambers, St. Mary's Gate, Manchester,
Agent for Applicant.