Improvements in or connected with Pneumatio Tyres.
Year: 1893

page_text: Date of Application, 3rd Aug., 1893
Complete Specification Left, 5th Apr., 1894-Accepted, 5th May, 1894
.
PROVISIONAL SPECIFICATION.
Improvements in or connected with Pneumatio Tyres.
I, JOHN WILLIAM HALL of 57 Villa Road Handsworth Birmingham in the
County of Staffordshire Engineer, do hereby declare the nature of this invention
to be as follows:-
My present invention consists of an improvement on the Patent applied for by
me and numbered 12544 and dated June 27th 1893. In that Patent I describe the
outer rubber cover of my tyre as being either of pure rubber with canvas
strengthening the beads and lower part of the cover or else as being lined
throughout with canvas.
I find however that it is very desirable to allow the outer cover to stretch a
certain amount in order that it may adjust itself to the size of the inner bag
correctly but at the same time it is very desirable to keep this stretching within
certain limits. For this purpose therefore I line the inside of the cover with
canvas or other material but instead of carrying it right round the inside of the
cover I preferably carry it up the two sides of the cover leaving a space along or
around the centre of the same of from about 1 inch to 1 inches wide without any
canvas. By this means the stretching of the cover to the size of the canvas bag
takes place along the centre of the cover.
Sometimes I prefer to have the stretch to take place on that part of the cover
next the rim in which case I carry the canvas right round the centre of the cover
but stop it short some distance from the beads on the edge of the same and in this
case to prevent creeping of the cover, strips of canvas may be worked diagonally
across the sides of the cover from the beads to the canvas lining. The canvas
may either be attached to the cover during the vulcanizing process or by means of
rubber solution after the cover is made.
Sometimes the cover may be lined all through with canvas and the necessary
stretch be allowed for or obtained by working a wire spring of a spiral or corrugated
form into each of the beads either during or after the vulcanizing process, suitable
provision being made in the shape and size of the rim to allow of the proper
operation of the edges of the cover. In this case the cover would be preferably
formed with inwardly turned beads and the gutters in the rim being of greater
depth than the bead on the cover the latter is prevented from being pulled out
of the gutter by coming in contact with the wire hoop of the canvas bag as
described in the before mentioned Patent No. 12544 of 1893.
Dated this 3rd day of August 1893.
JOHN WILLIAM HALL.
COMPLETE SPECIFICATION.
Improvements in or connected with Pneumatic Tyres.
I, JOHN WILLIAM HALL of 57 Villa Road, Handsworth, Birmingham, in the
County of Warwick, Engineer, 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 present invention consists of an improvement on the Patent applied for by
me and numbered 12544 and dated June 27th 1893. In that Patent I describe
the outer rubber cover of my tyre as being either of pure rubber with canvas
LD 077

page_text: strengthening the beads and lower part of the cover or else as being lined throughout
with canvas.
I find however that it is very desirable to allow the outer cover to stretch a
certain amount in order that it may adjust itself to the size of the inner bag
correctly, but at the same time it is very desirable to keep this stretching within
certain limits. For this purpose, therefore I line the inside of the cover with
canvas or other material but instead of carrying it right round the inside of the
cover I preferably carry it up the two sides of the cover leaving a space along or
around the centre of the same of from, about, 1 inch to 1 inches wide without any
.Canvas.
By this means the stretching of the cover to the size of the canvas bag .takes
place along the, centre of the cover.
Sometimes I prefer to. have the stretch to take place on that part.of the cover
next the rim, in which case I carry the canvas right round the centre of the cover
but stop it short some distance from the beads on the edge of the same and in this
case to prevent creeping of the cover, strips of canvas may be worked diagonally
across the sides of the cover from the beads to the canvas lining. The canvas may
either be attached to the cover during the vulcanizing process or else by means of
rubber solution after the cover is, made.
In the accompanying drawings:
1
Figure 1 is a transverse section, and
Figure 2 a plan of the inner side of portion of oue arrangement of the outer cover
constructed according to this invention.
Figures 3 and 4 are views respectively similar to Figs. 1 and 2 of another
arrangement of the outer cover.
Figure 5 is a transverse section and
Figure 6 a view showing in plan part of the outer sides of both outer and inner
covers, the latter of which in this example is provided with non-stretchable devices.
Like letters indicate like parts throughout the drawings.
The outer cover A shown in Figures 1 and 2 is formed of indiarubber and has
canvas or equivalent strips B solutioned, vulcanized or otherwise secured to or
incorporated with it. Each of these strips may be wrapped over one of the edges A¹
(which are here shown beaded but may be otherwise formed) of the cover A
and extend a short distance over the outer surface thereof and on the inner surface
to about or of an inch from the centre so as to leave an uncovered portion A*
of from preferably one inch to one and a half inches wide at the centre or tread of
the tyre. It will be seen by this construction that the portion A² of the cover A
retains its original elasticity while the parts covered by the canvas or equivalent B
are rendered practically non-stretchable so that the power transferred across them
from the wheel rim to the tread surface is not prejudicially affected.
To the edges of the covers A shown in Figures 3 and 4 and 5 and 6 canvas or
equivalent strips B are applied as in the preceding example but unlike those before
described do not extend so far over the inner surface of the cover the object of
these strips in these two arrangements (Figures 3 to 6) being merely to strengthen
and render the edges unstretchable.
In the arrangement shown in Figures 3 and 4 the tread or central portion of the
cover A is rendered practically unstretchable by a strip C of canvas or tape
secured as by solutioning to and extending all round the inner side of A. The
parts A between B and C are rendered practically unstretchable in a circum-
ferential direction by tape or canvas strips D extending diagonally across A and
secured, as by solutioning, to the inner side of BA and C; the diagonal
arrangement of the strips D across the parts A³ does not materially interfere with
the elasticity of these parts in a transverse direction.
The arrangement shown in Figures 5 and 6 embodies the main features of that
last described, similar means being employed for preventing stretching at the
desired parts. In this example however the strips C and D are sewn as indicated
at C' and D' or otherwise secured, as by solutioning to preferably the outer side of

page_text: the inner cover E. This cover may be formed as usual of canvas or other suitable
material cut on the bias as indicated by the lines E' in Figure 6 so as to give it
the necessary yielding properties to enable the air tube or bag to be properly
inflated within it the strips or tapes C and D rendering it practically non-stretch-
able in a circumferential direction between B and C while not materially interfering
with it in a transverse direction.
The canvas or equivalent cover E need not be entirely connected to the outer
cover A but to prevent creeping it is preferably solutioned to it at the central or
tread part.
The canvas cover E may be provided with a wire E at each edge or with any
other of the usual devices for retaining it (and if desired also the outer cover A)
on the wheel rim.
With regard to the constructions shown in Figures 3 to 6 it will be seen that
the strips or tapes D are arranged in pairs one of each pair making an angle
with the other and it is to be observed that a tyre so constructed should be placed
on the wheel so that in travelling the open end (or those more directly connected
with the rim) of each of these angles reaches the ground before the close end (or
part more directly connected with the tread of the cover) the stretching of the
tyre circumferentially being thereby prevented.
Instead of using canvas or tape as before described I may use other suitably
non-stretchable material.
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. A tyre-cover free to stretch at the tread (A2) but prevented from stretching
at the sides (B) substantially as described and illustrated in Figure 1 of the
accompanying drawings.
2. A tyre-cover free to stretch sideways at the sides (A³) but prevented from
stretching at the tread (C) circumferential stretching of the sides A³ being
prevented by diagonal strips such as D substantially as described and illustrated in
Figures 3 and 4 of the accompanying drawings.
3. The combination with an elastic tyre cover of non-stretchable strips such as D
laid diagonally across it substantially as described and illustrated in the accom-
panying drawings.
4. The combination with an elastic tyre cover of non-stretchable strips such as
B and C secured to the edges and to the central portion and extending throughout
the circumference thereof and non-stretchable diagonal strips such as D connecting
B and C substantially as described and illustrated in Figures 3 and 4 of the
accompanying drawings.
5. The combination with a canvas or like tyre cover of non-stretchable diagonal
strips such as D substantially as described and illustrated in the accompanying
drawings.
6. The complete tyre cover substantially as described and illustrated in
Figures 2 and 3 of the accompanying drawings.
7. The complete tyre cover substantially as described and illustrated in
Figures 5 and 6 of the accompanying drawings.
Dated this 30th day of March 1894.
W. HALL.
W. P. Thompson & Boult,
Agents for the Applicant.