Improvements in Rubber or Elastic Tyres for Vehicle, Velocipede, and other like Wheels.
Year: 1897

page_text: Date of Application, 10th Nov., 1897
Complete Specification Left, 9th Sept., 1898-Accepted, 10th Nov., 1898
PROVISIONAL SPECIFICATION.
Improvements in Rubber or Elastic Tyres for Vehicle, Velocipede,
and other like Wheels.
We, THE DOUBLE ARCH TYRE COMPANY, LIMITED, of Kirkgate, Huddersfield,
in the County of York, Tyre Manufacturers, and DAVID CROWTHER, of Pickford
Street, Milnsbridge, near Huddersfield, aforesaid, Engineer, do hereby declare
the nature of this invention to be as follows:-
This invention relates to improvements on the tyre set forth in the Specifications
of Letters Patent granted to the aforesaid David Crowther No. 9006 A.D. 1892,
and to the said Double Arch Tyre Company Limited and David Crowther No. 2506
A.D. 1896.
In the specification of the last named patent, we shew a central annular or
longitudinal bead or beads or ribs, marked i on the drawing, which is or are
placed between two or more members of the tyre, said rib or ribs being made
integral with one or both such members or made integral with one member and
solutioned to the other, or solutioned to one or both members.
Our present improvements consist in forming, moulding or otherwise applying
on the outer surface of the inner member or the inner surface of the outer member
of the tyre, or both, in addition to above rib or ribs other ribs or beads extending
outward from the central longitudinal bead or rib on each side thereof and
preferably tapering to nothing at the points where the walls of the two members
meet, that is to say, in arched form, the meeting curve or configuration of the
cross ribs is approximately coincident with that of the inner surface of the outer
member or the outer surface of the inner member, so that said ribs shall form
a bearing surface throughout their length, or transversely of the tyre, at short
The said cross beads or ribs may be
distances apart between the two members.
arranged at any suitable angle to the central bead or rib, as for instance, the
termination of one rib on one side of the member concerned may be opposite the
extremity of the next rib on the other side of said member, thus giving a con-
tinuous bearing surface throughout the whole tyre; or said cross beads may be
arranged to give interrupted bearing surfaces, or they may be arranged at right
angles to the central bead or in the form of the letter V. When the tyre is
constructed of more than two members, the longitudinal and cross ribs may be
applied, as above described, between each member, or between two members only,
or partly between one and partly between the other, or otherwise, as desired.
The inner member of the tyre or one or more inner members may be formed
with the ribs on both sides or surfaces, those on the underside being preferably
arranged in reverse order to those on the outer side, though any order or angular
arrangement may be adopted, this being done more particularly to lighten the
tyre without reducing its strength or power of resistance to the load it is to carry.
The members of the tyre may be moulded in flat strips or in arched sections,
but preferably in the form which they assume when applied to the rim of the

page_text: wheel. A suitable hollow rim is constructed for cycle tyres in which the above
tyre can be secured by cement, or by wires or other means, but a solid rim can
be used if required.
1
Dated this 9th day of November 1897
3.
Piz
L
Improvements in Rubber or Elastic Tyres for Vehicle, Velocipede,
and other like Wheels.
1
We, THE DOUBLE ARCH TYRE COMPANY, LIMITED, of Kirkgate, Huddersfield,
in the, County of York, Tyre Manufacturers, and DAVID CROWTHER, of Pickford
Street, Milnsbridge, near Huddersfield, aforesaid, Engineer, do hereby declare
the nature of this invention and in what inanner the same is to be performed, to
be particularly described and ascertained in and by the following statement:
+
f,
This invention relates to improvements on the tyre set forth in the Specifications
of Letters Patent granted to the aforesaid David Crowther No. 9006 A.D. 1892,
and to the said Double Arch Tyre Company Limited and David Crowther, No. 2506
A.D. 1896.
In the specification of the last named patent, we shew a central annular or
longitudinal bead or beads or ribs, marked i on the drawing, which is, or are
placed between two or more members of the tyre, said rib or ribs being made.
integral with one or both such members or made integral with one member and
solutioned to the other, or solutioned to one or both members.'
.
+
Our present improvements consist in forming, moulding or otherwise applying
on the outer surface of the inner member, or the inner surface of the outer member
of the tyre, or both in addition to above rib or ribs, other ribs or beads extending
outward from the central longitudinal bead or rib on each side thereof., and
preferably tapering to nothing at the points where the walls of the two members
meet, that is to say:-in arched form, the meeting curve or configuration of the
cross ribs is approximately coincident with that of the inner surface of the outer
member or the outer surface of the inner member, so that said ribs shall form
a bearing surface throughout their length, or transversely of the tyre, at short
distances apart between the two members. The said cross beads or ribs may be
arranged at any suitable angle to the central bead or rib, as for instance; the
termination of one rib on one side of the member concerned may be opposite. the
extremity of the next rib on the other side of said member, thus giving a.con-
tinuous bearing surface throughout the whole tyre: or said cross beads may be.
arranged to give interrupted bearing surfaces, or they may be arranged at right
angles to the central bead or in the form of the letter V.
In order that our invention may be fully understood. reference is hereafter had
to the annexed drawings forming a part of this specification in which:-
Fig. 1 is perspective view of a fragment of a cycle tyre embodying our inven-
tion, and
"
J
Fig. 2 is transverse sectional elevation of same.
Fig. 3 'is perspective view of a vehicle tyre embodying our invention.
Fig. 4 is transverse section of the inner arch of the tyre, shewing a modification.
Figs. 5, 6, and 7 are plan views of the inner arch showing different constructions.
Referring to the drawings, letter a designates the inner arch or member of
the tyre, at the central bead or rib on the apex thereof and integral therewith.

page_text: b, the outer arch' or member surrounding the top and sides of the inner arch a
and bearing upon the central béad or rib at which particularly in vehicle tyres, may
be solutioned to the said outer arch b, and c, c, are air spaces between the two
arches or members of the tyre.
The above comprises the construction of tyre described and shown in my said
Letters Patent No. 2506 of 1896, and my present improvements consist in pro-
viding radial or transverse ribs d, d, formed integral with the inner arch or
inember a and curving on their outer surfaces to the radius of the inner walls
of the outer arch or member, the extremities of said radial or transverse ribs dying
away or tapering to nothing at the sides of the inner arch a. These transverse
ribs d, d, are arranged at equal distances apart around the tyre (the spaces
between said ribs forming the air spaces c, c) and are formed at such an angle
to the central bead or rib a¹ that the extremity of one rib on one side of the
inner arch a is opposite or approximately opposite the extremity of the neighbour-
ing rib on the opposite side of the inner arch a, as shewn in plan view Fig. 5,
whereby a continued bearing surface or reinforcement is given to the outer arch b
throughout its length.
The construction of the surface of the inner arch a of the tyre is exactly the
same for vehicles or other wheels as for bicycle wheels, as will be seen from
Fig. 3, which is to all intents the same tyre as shewn at Fig. 1, though made
stronger and proportioned to carry heavier loads.
The ribs d, d, support or reinforce the tyre at short intervals at each side of the
central bead or rib a¹, which supports the tread only, and this reinforcement of the
sides of the outer arch 6 in addition to giving greater resistance to depression, also
reduces liability to side slip.
When the tyre is constructed of more than two members, which may be done
for very heavy vehicles, the central annular rib a¹ and the cross or radial ribs d, d,
may be applied as above described between each member or between two members
oily, or partly between one and partly between the other as desired.
The transverse ribs d, d, instead of being formed on the outer surface of the
inner member, as shewn may be formed on the inner surface of the outer member.
The inner member of the tyre or one or more inner members may be formed
with ribs on both aides or surfaces, as shewn at Fig. 4, those on the under
or inner surface being preferably arranged at an angle exactly opposite to the
angle of the ribs d, d, on the outer surface, this construction being intended more
particularly to lighten the tyre without reducing its strength or power of resist-
ance to the load it has to carry.
The ribs d. d, may be formed at right angles to the central bead or rib a¹ as
in Fig. 6 or moulded in the form of the letter V as in Fig. 7, or any other angular
or radial arrangement giving interrupted or uninterrupted bearing surfaces may
be adopted.
The members of the tyre, especially the cycle tyre, may be moulded in flat strips
or in arched sections but preferably in the form which they assume when applied
to the rim of the wheel. A suitable hollow rim, as shewn at Fig. 2, is used for
the cycle tyres wherein they are secured by cement or by wires or other means,
but a solid rim can be used if required. The vehicle tyre is also either made to
wire on to the rim of the wheel or to be cemented therein.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:
1, In arched tyres of the construction herein set forth, the combination with a
central annular rib or bead such as a¹ intermediate of the arched sections or mem-
bers and supporting the outer member or section of the tyre, of radial or transverse
ribs such as d, d, extending on each side from said central rib to the meeting
points of the arched members and curving to the radius of the opposing arch in
manner and for purposes, substantially as herein shewn and described.

page_text: 2, In arched tyres of the construction set forth, the application of radial or trans-
verse ribs intermediate of the arched sections for reinforcing the tyre, substantially
as herein shewn and described.
TASKER & CROSSLEY,
Patent Agents, Huddersfield, Agents for Applicants.