Improvements in Noiseless Tyres for Wheels.
Year: 1898

page_text: Date of Application, 29th Oct., 1898
Complete Specification Left, 29th July, 1899-Accepted, 7th Oct.. 1899
Improvements in Noiseless Tyres for Wheels.
I, CHARLES CHALLINER, of 15, Plymouth Avenue, Longsight, Manchester, in
the County of Lancaster, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to the construction of india rubber tyres for the wheels
of vehicles used upon common roads, or warehouse trucks, etc. the base of such
rubber tyres being confined in a metal trough shaped rim of any convenient
section, undercut, plain channel or in a splay form.
The principal objects of the invention are to strengthen the rubber tyre, to
increase its durability, and to prevent its liability to become loose in its groove,
when in undercut section, and to prevent the rubber from creeping shortening or
lengthening, which is known to exist at present in open channel tyres, when wired
on with two wires, and to minimise the cost of the rubber.
For the purposes of my invention I form a piece of india rubber tyre of the
ordinary section (or nearly so) having a slightly convex base and an indentation
or groove along each side to receive the inwardly turned flanges of the metal rim,
and in the centre of the base thereof I embed a vertical strip of canvas or other
suitable material say about five eighths of an inch in depth (more or less) in the
base of the rubber so that it extends above or about the top of the metal rim,
and say about three sixteenths of an inch wide (more or less). Or I may make
the rubber tyre with a groove in the centre of the base and embed the canvas or
other packing therein afterwards, and solution them together. Or I may put
two strips in the same way, nearly close to each other, or nearer to the outer
edges of the rubber leaving the soft rubber in the centre, and unite them to the
rubber in any convenient way.
The introduction of this vertical strip of folded canvas or other suitable
matarial into the tyre allows of sufficient elasticity to the base for the introduc-
tion of the tyre into the groove of the metal rim, when undercut rims are used,
at the same time that it considerably strengthens the tyre, prolongs its life, and
effectually prevents its liability to work loose in the metal groove or to become
forced out of the same, but strips of canvas fixed in this position cannot be
separated from the rubber when in use, as the tendency is to bind them together,
as in cases where canvas is fixed flat onto the base of the rubber, the tendency is
to separate, but by embedding the canvas in this vertical position or nearly so
water is prevented from getting in between the rubber and the canvas and
separating the two, thereby causing the canvas to rot, so that this improved
method will be found valuable in overcoming this existing evil.
In some cases I propose to give additional strength and security to the tyres
by using a wire immediately over the canvas and when that wire is twitched on
it will have a solid bed, and cannot cut through as is the case when it rests on soft
india rubber, or if preferred two wires may be inserted in the india rubber, one
on each side of the canvas core and their ends connected in the ordinary well
known manner, and especially so when channels are used of an open or splay

page_text: form, not undercut, and in this case the rubber will be prevented from creeping
or shortening when in use, thus effecting a saving in rubber.
This wire will run immediately over the top of the canvas will be embedded in
the canvas and when the tyre is in use, the wires will not cut through to the
bottom, as it is known to do when the wire is through the soft rubber, and the
wire will twitch more firmly as it will have a solid bed and will hold more
securely by this means.
Another use of the canvas core in this tyre is to prevent the rubber from creep-
ing or shortening on the wires as it is known to do in wired on tyres at present in
use, and my object is to prevent the rubber from shortening when used in steel
grooves without turned-in edges and to stop all creeping of the rubber.
The rubber and the canvas or other core will be vulcanized or otherwise secured
firmly to the elastic rubber.
I am aware that a metal strip fixed on the flat of the base has been used before,
as in my Patent No. 18,941 of 1889, for a rubber tyre with non stretching base,
and that canvas and other strips have also been used in like manner but when
used in this way it is known to separate from the rubber when it is compressed
into an undercut section, as the compression has a tendency to separate the canvas
from the rubber or other strip, but in my case the action will be the reverse, i.e.
the compression will help to hold the canvas to the rubber more firmly, and by
these means the above mentioned evil will be overcome.
Data
1000
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.
I, CHARLES CHALLINER, formerly of 15, Plymouth Avenue, now of 262, Stock-
port Road, Longsight, Manchester, in the County of Lancaster, 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 follow-
ing statement:-
This invention relates to the construction of solid india rubber tyres for the
wheels of vehicles used upon common roads, or warehouse trucks &c. the base of
such rubber tyres being confined in a metal trough-shaped rim of any convenient
section, undercut, plain, channel, or in a splay form, or formed in two pieces
belted together.
The principal objects of the invention are to strengthen the rubber tyre, to
increase its durability, and to prevent its liability to become loose in its groove,
when in an undercut section of rim, to prevent the rubber from creeping, short-
ening or lengthening, which is known to exist at present in open channel tyres,
when wired on with two wires, and to minimize the cost of the rubber.
The manner in which my said invention is to be performed or carried into prac-
tical effect will be readily understood on reference to the sheet of illustrative
drawings hereunto annexed and the following explanation thereof.
For the purposes of my invention, when applied to a metal rim of a combined
undercut and splayed form as shown at Figs. 1 and 2 on the drawings, I take a
piece of rubber tyre a of the ordinary section (or nearly so) preferably having a
slightly convex base and an indentation or groove along each side to receive the
inwardly projecting flanges of the metal rim c, and in the centre of the base

page_text: thereof I embed a vertical strip of folded canvas or other suitable material d (say)
about five eighths of an inch in depth (more or less) in the base of the rubber su
that it extends above or about the top of the said flanges b of the metal rim, and
(say) about three sixteenths of an inch wide, more or less.
Or I may make a special rubber tyre with a groove in the centre of the base
and embed the canvas or other packing d therein afterwards and solution them
together.
Or in cases where the metal channel c is made plain without the inwardly pro-
jecting flanges b as shown at Figs. 34 and 5, I may put in two (or sometimes
three) folded canvas or other strips d nearer to the outer edges of the rubber a
leaving the soft rubber in the centre and unite them to the soft rubber in any
convenient way.
A single wire e may be used for securing the tyre in its place as shown at
Figs. 2, 5, and 8 or two wires as shown at Figs. 3, 4, 9, 10, 11 and 12, or in some
cases even three wires as shown at Fig. 6.
The introduction of the vertical or nearly vertical strip of folded canvas or other
suitable material d into the tyre allows of sufficient elasticity in the base of the
tyre for the introduction of the same into the groove of the metal rim c, when
undercut rims are used, at the same time that it considerably strengthens the
tryc, prolongs its life, and effectually prevents its liability to work loose in the
metal groove c or to become forced out of the same, but strips of canvas or other
suitable material when fixed in the position shown cannot be separated from the
rubber when in use, as the tendency is to bind them together, and in cases where
canvas is fixed flat onto the base of the rubber, it has been found that the ten-
dency is to separate, but by embedding the canvas or other core in the vertical
position (or nearly so) water is prevented from getting between the rubber and
the canvas, and separating the two, and thereby causing the canvas to rot, so
that this improved method will be found valuable in overcoming this existing evil.
I may here remark that I do not wish to confine myself to the use of folded
canvas or other woven fabric as the core d may (if preferred) be made of solid
felt or other suitable material as shown at Figs. 9, 10, 11 and 12.
"
In some cases I propose to give additional strength and security to the tyres
by using a wire immediately over the core as shown at Figs. 2, 3, 4, 5 and 6, so
that when the wire is "twitched-on it will have a solid bed, and cannot cut
through as is sometimes the case when it rests on soft india rubber, or one on
cach side of the core as shown at Figs. 9, 10, 11 and 12, their ends being con-
nected together in the ordinary well-known manner, and especially so when
metal channels are used of an ordinary open or splay form, not undercut, and in
this case the rubber will be prevented from creeping or shortening when in use,
thus effecting a saving in rubber.
The rubber and the canvas or other core will be vulcanized or otherwise secured
firmly together.
I am aware that a metal strip fixed flat on the base of a rubber tyre has been
used before, as in my Patent No. 18941 of 1889, and that canvas and other strips
have also been used in like manner, but when used in such way it is known to
separate from the rubber when it is compressed into an undercut section, as such
compression has a tendency to separate the canvas or other strip from the rubber
but when applied according to my invention the action will be the reverse i.e. the
compression will help to hold the canvas or other core to the rubber more firmly,
and by these means the above mentioned evils will be overcome.
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
First: The combination with noiseless rubber tyres for wheels of a core (or
cores) of folded canvas or other suitable material, embedded or let into a groove
(or grooves) formed vertically or nearly so in the base of the rubber tyre, sub-

page_text: stantially as and for the purposes hereinbefore described and illustrated by the
drawings annexed.
Secondly I claim the combination with such cores, so placed, of a wire (or
wires) placed immediately over the said core (or cores) substantially as and for
the purposes described and illustrated, and
Thirdly I claim generally the improvements in noiseless tyres for wheels con-
structed manufactured and applied substantially as described and illustrated.
Dated this 27th day of July 1899.
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.