Improvements in or applicable to Noiseless Tyres for Wheels.
Year: 1893

page_text: Date of Application, 6th June, 1893
Complete Specification Left, 6th Mar., 1894-Accepted, 2nd June, 1894
PROVISIONAL SPECIFICATION.
Improvements in or applicable to 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:
:-
These improvements relate to the construction of noiseless tyres for the wheels of
cabs and other vehicles the improvements being confined principally to the manu-
facture of the steel or other grooved metal tyres in which the india rubber (which
forms the running surface) is confined and especially to such sections as are rolled
in the displayed form and closed in afterwards.
According to one modification of my invention I roll the upper side of the base
perfectly flat with the sides displayed at such an angle and of such a form as will
allow them to clear the grooves of the rolls, the underside of the base being rolled
concave, so that the base is thicker at the sides than towards the middle.
I finish this section by flattening down the outside of the base to a straight line
which will have the effect of making the inside of the base concave and at the same
time bringing inwards the upper edges of the sides so as either to form a dovetail
section, or to bring the sides into a vertical position with an internal bead, so as to
obtain the necessary grip of the sides of the india rubber.
In either case I sometimes make also an external bead or projection on each side
(or on one side only) whereby I obtain all the benefits of an overhanging tyre
without the necessity for using an increased quantity of india rubber.
The section of india rubber must be made with a convex base to fit the concavity
of the steel or other metal tyre and it will be found that this form will obviate the
tendency which india rubber with a flat base as usually employed has to become
hollow and so leave a space between it and the base of the metal section.
Another advantage of the concave inner section of the base of the metal tyre
is that the metal is thicker at the part where it joins the sides which in ordinary
sections hitherto employed has been always the weakest point.
According to another modification I roll the steel or other section displayed,
but with the base parallel in thickness and either curved or bent so that, when
it is finished by flattening the base, the upper edges of the sides will be brought
nearer together in the known way of rolling such sections. Instead however of
rolling the sides either flat, or curved in a C-form, or flat with an internal bead
as hitherto practised I roll them of a double bevilled form with a flat between
so that when finished they present the form outside of a flattened bead with
bevilled edges overhanging the sides of the felloe, the inner form being a double
bevilled groove which has a very firm grip on the rubber.
This form also besides having a very light and elegant appearance possesses
all the benefits of an overhanging tyre without materially increasing the amount of
rubber required.
DAL
L
T 1000
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.

page_text: Improvements in or applicable to 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 and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
These improvements relate to the construction of noiseless tyres for the wheels
of cabs and other vehicles the improvements being confined principally to the
manufacture of the steel or other grooved metal tyres in which the india rubber
(which forms the running surface) is confined and more especially to such sections
as are rolled in the displayed form and closed in afterwards.
The principal object of my invention is to prevent the base of the said rubber
from becoming hollow when in use and so wearing the base of the grooved steel
tyre.
The nature of my said invention and the manner in which the same is to be
performed will be readily understood on reference to the sheet of drawings hereunto
annexed, and the following explanation thereof.
Fig. 1 on the drawings is a section showing the working faces of a pair of
grooved rolls adapted for rolling the steel or other metal channelled tyres for
holding the india rubber.
According to one modification of my invention I roll that part which eventually
forms the inner side of the base of the channel perfectly flat as shown at a (Fig. 1)
in the first or left hand groove A, with the sides b displayed at such an angle
and of such a form as will allow them to clear the grooves of the rolls, the
other side of the base, as at c, being rolled concave so that the base is thicker at
the sides than towards the middle.
I then turn this section over and finish it in the second groove B, by flattening
down the outside c of the base to a straight line, which will have the effect of
making the inside a of the base concave (as shown), and at the same time bringing
inwards the sides into a vertical position with an internal bead, so as to obtain
the necessary grip of the sides of the india rubber, the form of which is shown
detached in section at Fig. 2, and in its place at Fig. 3 and at Fig. 34, or as at
Fig. 3B.
In either case I sometimes make also an external bead or projection d on each
side, as shown at Fig. 3, or on one side only as seen at Figs. 4 and 5, whereby I
obtain all the benefits of an overhanging tyre without the necessity for using an
increased quantity of india rubber, which was necessary when the overhanging
tyre was formed by curving out the side or sides of the steel section or channel.
Fig. 1 shows a slight modification in the method of rolling the tyre without a
curve in the first groove, and Fig. 1 shows the application of my improved
method of obtaining an overhanging tyre with the ordinary flat form of base.
The section of india rubber must be made with a convex base (see Fig. 2) to
fit the concavity of the steel or other metal tyre, and it will be found that this
form will obviate the tendency which india rubber with a flat base, as usually
employed, has to become hollow and so leave a space between it and the base of
the metal section or channel; dirt, grit, and water have been found in the sections
now in use to penetrate into the said space and being kept constantly in motion
therein have worn away the metal base of the steel section or channel.
By this
invention however the rubber fits down into the curve of the metal base and is
thus prevented from rising at the middle and forming the space above described.
Another advantage of the concave inner section of the base of the metal tyre
is that the metal is thicker at that part where it joins the sides which in ordinary
sections of this type hitherto employed has been always the weakest point.

page_text: According to another modification (as shown at Fig. 6) I roll the steel or other
section displayed but with the base parallel in thickness and either curved or bent.
as described and claimed in the Specification of Letters Patent No. 703 grante.l
to William Hassalwood Carmont dated February 8th 1883, so that when it is
finished by flattening the base, the upper edges of the sides will be brough
Instead however of
nearer together in the known way of rolling such sections.
rolling the sides either flat, or curved in C-form, or flat with an internal bead as
hitherto practised, I roll them of a double bevilled form with a flat bottom s▸
that when finished they present the form, outside, of a flattened head with beville:
edges overhanging the sides of the felloe, the inner form being a double bevilled
groove which has a very firm grip on the rubber (see Fig. 6). The section of
rubber used with this tyre is shown at Fig. 7.
This form also, besides having a very light and elegant appearance possesses all
the benefits of an overhanging tyre without materially increasing the amount of
rubber required.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that I make
no claim to rolling the steel or other metal sections in a displayed form with a bent
base and then flattening down the base to a straight line, which brings the sides.
nearer together as described and claimed in the Specification of Letters Patent
above referred to but what I claim as my invention is :―
First. The improved sections of steel or other metal tyres (for the reception of
india rubber or other elastic substance) formed with a concave base and with
internally beaded vertical sides, in combination with outer projections on one or
both sides for the purpose hereinbefore described.
Secondly. I claim the improved method of rolling such metal sections to form
a concave base with internally or beaded sides, or dovetailed sides with outwardly
external projections, as hereinbefore described and illustrated by the drawings.
annexed.
Thirdly. The formation on the outside of a metal channelled tyre having a flat
base of a bead having a double bevilled form as shown at Fig. 6 on the annexed.
drawings.
Dated this 5th day of March 1894
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.