Improvements in or applicable to Pneumatic Tyres for Vehicles.
Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required
by the decision of the Law Officer of the 26th day of July 1897.
Date of Application, 5th May, 1896
Complete Specification Left, 17th Oct., 1896-Accepted, 16th Jan.,
1897
PROVISIONAL SPECIFICATION.
Improvements in or applicable to Pneumatic Tyres for Vehicles.
We PHILIP ARTHUR BIRLEY of Cambridge Street, Manchester, Manager,
and
CHAS. MACINTOSH & Co. LIMITED of Cambridge Street, Manchester,
Indiarubber Manufacturers, do hereby declare the nature of this invention to be
as follows:-
Our said invention relates to improvements in pneumatic tyres having an inner
inflating tube and an outer cover or casing.
According to our said invention we form the outer cover of an annular strip of
canvas or similar fabric of sufficient width to encircle the air tube and to overlap.
To a portion of the breadth of the strip we apply rubber or rubber and canvas to
form the external part of the tyre. The remaining part forms a flap which
encircles or partly encircles the air tube. This part may in some cases be covered
with rubber or may be varnished or coated or impregnated with a solution or
composition to render it waterproof or to augment the surface friction between the
layers or folds of the outer cover. The whole is inserted in a rim or felloe and on
inflation the pressure and consequent friction of the folds of the cover on each
other will prevent its displacement.
1000
E. T. WHITELOW, A.M. Inst. C.E.,.
70 Deansgate, Manchester, Agent for the Applicants.
Improvements in or applicable to Pneumatic Tyres for Vehicles.
We PHILIP ARTHUR BIRLEY of Cambridge Street, Manchester, Manager,
and CHAS. MACINTOSH & Co. LIMITED of Cambridge Street, Manchester,
Indiarubber Manufacturers, 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 :-
Our said invention relates to improvements in pneumatic tyres having an inner
inflating tube and an outer cover or casing.

page_text: According to our said invention we form the outer cover of an annular strip of
canvas or similar fabric of sufficient width to encircle the air tube and to overlap.
To a portion of the breadth of the strip we apply rubber or rubber and canvas to
form the external part of the tyre. The remaining part forms a flap which
encircles or partly encircles the air tube. The whole is inserted in a rim or felloe
and on inflation the pressure and consequent friction of the folds of the cover on
each other will prevent its displacement.
Referring to the accompanying drawings in illustration of our said invention
Figure 1 illustrates a cross section of a tyre in which that part of the annular
strip which does not form the external part of the tyre only encircles part of the
inner tube.
In this figure a is the inner or inflating tube b is the annular strip of canvas or
the like suitable material. To the part from 6 to 62 we apply rubber or layers of
rubber and canvas to form the external part of the tyre. This external part of
the strip may be corrugated or otherwise fashioned so as to form a non-slipping
surface of the usual well known kind. When the air tube a is enveloped in the
cover the whole is inserted in the rim or felloe c and inflated.
The flaps or one of them may also be carried wholly round the inner or inflating
tube.
b
In constructing the outer cover we use a flat annular band of canvas (shown in
section at 6 (Figure 3) cut on the cross or bias for the sake of greater flexibility
and apply to that part thereof which is to form the external part a thickening e of
rubber or rubber and canvas. Rubber may also be applied to the remaining part
of the strip or it may be varnished or impregnated with a suitable solution or
composition in order to render it waterproof or to augment the surface friction
between the layers or folds of the outer cover and the inner tube.
The strip or band is next applied to an annular mandril f (shown in cross
section in Figure 4) with the part e turned inwards. The diameter of the mandril
is such that when the strip b is applied thereto the edges are brought into
proximity and while in this position strips of canvas d2 cut on the straight
i.e. parallel to the threads of which it is composed or similar material are cemented
or solutioned to the strip b. The whole is subsequently removed from the mandril
and turned inside out so that the strips d are presented to the inner tube while
the part e is turned outwards. These strips not merely strengthen the outer cover
but help the layers to assume the proper coiled position and to preserve it when
inflated.
The annular mandril may be made hollow and telescopic as shown in Fig. 5 so
that when it is desired to remove the cover the part g may slide into the part h,
or the mandril may be made in sections which may be taken apart for the same
purpose.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
1. In a pneumatic tyre an outer covering such as described wholly or partly
encircling the air tube substantially as set forth.
1000
E. T. WHITELOW, A.M. Inst. C.E.,
70 Deansgate, Manchester, Agent for the Applicants.