Improvements in or relating to Protected Elastic Wheel Tyres.
Year: 1899

page_text: Date of Application, 7th Apr., 1899
Complete Specification Left, 4th Jan., 1900-Accepted, 17th Mar., 1900
[Communicated from abroad by JOSEPH PAUL LEGRAND, of No. 8, Rue du Gentier
Paris, France, Engineer].
Improvements in or relating to Protected Elastic Wheel Tyres.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.L.M.E., of the Agency for Foreign
Patent Solicitors, 322, High Holborn, in the County of Middlesex, 6, Lord Street,
Liverpool, and 6, Bank Street, Manchester both in the County of Lancaster, and
Lower Temple Street, Birmingham, in the County of Warwick, Civil Engineer,
do hereby declare the nature of this invention to be as follows:-
The use of elastic wheel tyres either solid or pneumatic extends constantly,
and numerous means have been devised of diminishing wear and preventing
damage to which this kind of elastic tyres is more liable than are ordinary tyres.
Among the means employed have been protectors formed of metallic plates
surrounding the elastic rim, but these protectors have not hitherto been practi-
cally satisfactory because if a metal plate of little thickness be employed it works
too much on the rolling surface (by reason of the deformation produced by contact
with the ground); and on the other hand it loses its elastic qualities if con-
structed of too great thickness.
The object of this invention is a new system of protector for remedying these
defects, and using the metal on the rolling surface of sufficient thickness (2 and
3 millimeters) whilst preserving the requisite qualities of pliability and elasticity,
owing to the special method of mounting.
This protector consists of a belt provided with metallic sectional pieces together
with flat and very flexible plates inserted between the rubber and the aforesaid
belt so as to prevent wear to the rubber of the tyre.
These blades in order to prevent the heating of the rubber by the metal can
be replaced by a rubber-lined band of the size of the protector, and formed of
strong cloth with a thickness of rubber of 2 to 3 millimetres.
The invention is described below with reference to the accompanying drawings:
Figure 1 is a plan view of a portion of the protector shewn in elevation in
Figure 2.
Figure 2 is a side elevation of a portion of the protector.
Figure 3 is a section on the line X Y of Figure 1.
Figure 4 is a sectional view of an elastic tyre provided with the protecting
device shewing the method of attachment to the rim by means of simple hooks
or clips.
Figure 5 is a sectional view on the line UV of Figure 1 of an elastic tyre pro-
viled with the protecting device shewing another method of attachment to the
rim.
Figure 6 shews in plan one of the plates inserted between the protected belt
and the rubber.
The protector is constructed with a belt a of leather, rubber, cotton, or other
suitable substance, and covered with metallic pieces (having the form of an

page_text: elongated ring such as 6) placed side by side, separated from each other by a
slight space and covering the exterior and interior portion of the belt. These
metallic rings are of iron, copper or preferably of aluminium, and are about
20 millimeters broad by 2 millimeters thick. As shewn in Figure 3 the metallic
rings are not completely closed but have an opening on the side against the
rubber of the tyre to allow room for the rivets, transverse bands or attachments.
The belt a can be flat but I prefer to give it a convex or bevelled surface as shewn
in Figures 4 and 5, so as to diminish the width of. the tread.
The protector formed in this manner is united to the elastic tyre by means of
flexible and non-stretching transverse bands d, suitably distributed over the
elastic rim, the said bands being fixed to the belt a on the one hand by means
of a rivet r and on the other hand attached to the rim by simple hooks with hinges,
as shewn in Figures 4 and 5.
The essential characteristic of this system is the construction of a protector
by means of sectional metallic pieces mounted on belting, which allows the pro-
tector to diminish in length when it comes in contact with the ground. The arch
as shewn in Figure 2 can then coincide with the chord without the metal being
pressed back upon the tread against the rivets of the transverse bands, as occurs
with metallic plates made in a single piece.
I this kind of protected belt were placed directly on the wheel it would have
the defect of wearing out the rubber of the tyre too rapidly by friction and
pressure caused by the consecutive metal pieces. This defect is obviated by in-
serting between the protected belt and the elastic band thin and flexible metallic
plates e, as shewn in Figure 6. The size of these plates corresponds to that of
the protector and they have a thickness of from 6 to 8 tenths of a millimeter.
Their length about corresponds to the space between two consecutive attaching
bands d. These plates e have a round hole f at one end and at the other end an
oval hole g, and through these holes rivets are passed. In consequence of the
hole g being oval, the blade e, when compressed against the ground, is not
squeezed between the two rivets which support it at its extremities, but can slide
between the rubber and the protector without straining the metal.
In vehicles which it is sometimes necessary to make go backwards, the sliding
of the plates both ways can be obtained by making the aforesaid round hole f
oval also.
This kind of protector can obviously be applied to elastic tyres of all kinds,
solid or pneumatic, and to all wheels of carriages, automobile or otherwise, cycles
or motor-cycles. For solid rubber tyres the attachment device of hooks or hinges
can easily be replaced by rivets traversing here and there the thickness of the
rubber and the rim of the wheel, and fixed by nuts to the rim, thus uniting the
solid rubber and the protector, and rendering them entirely untearable.
For the light wheels of cycles the thickness of the sectional plates protecting
the belt need only be from 4 to 6 tenths of a millimeter, the wear on the rolling
surface being insignificant, and to prevent the overlapping of these blades they
can be fixed inside on the belt by means of small rivets.
1
C
11000

page_text: Liverpool, and 6, Bank Street, Manchester both in the County of Lancaster, and
Lower Temple Street, Birmingham, in the County of Warwick, Civil Engineer,
do hereby declare the nature of this invention and in what manner the same is
to he performed to be particularly described and ascertained in and by the follow-
ing statement:-
The use of elastic wheel tyres either solid or pneumatic extends daily, and
numerous means have been devised for diminishing wear and preventing damage
to which this kind of elastic tyre is more liable than are ordinary tyres.
Among the means employed have been protectors formed of metallic plates
surrounding the elastic rim, but these protectors have not hitherto been practi-
cally satisfactory because if a metal plate of little thickness be employed it works
too much on the tread (by reason of the deformation produced by contact with
the ground) and on the other hand it loses its elastic qualities if constructed of
too great thickness.
The object of the present invention relates to a new system of protector for
remedying these defects, and using the metal on the tread of sufficient thickness
(two and three millimetres) whilst preserving the requisite qualities of pliability
and elasticity, owing to the special method of mounting.
This protector consists of a belt provided with metallic sectional pieces together
with flat and very flexible plates inserted between the rubber and the aforesaid
el so as to prevent wear to the rubber of the tyre.
These plates in order to prevent the wearing of the rubber by the metal, may
he replaced by a rubber lined band the size of the protector, and formed of strong
cloth with a thickness of rubber of from two to three millimetres.
The invention is described below with reference to the drawings accompany-
ing the Provisional Specification in which
Figure 1 is a plan view of a portion of the protector shewn in elevation in
Figure 2.
Figure 2 is a side elevation of a portion of the protector.
Figure 3 is a section on the line X-Y of Figure 1.
Figure 4 is a sectional view of an elastic tyre provided with the protecting
device shewing the method of attachment to the rim by means of simple hooks
or clips.
Figure 5 is a sectional view on the line U-V of Figure 1 of an elastic tyre
provided with the protecting device shewing another method of attachment to the
rim
Figure 6 shews in plan one of the plates inserted between the protected belt
and the rubber.
The protector is constructed with a belt a of leather, rubber, cotton or other
suitable substance, and covered with metallic pieces (having the form of an
elongated ring such as b) placed side by side, separated from each other by a
slight space and covering the exterior and interior portion of the belt. These
metallic rings are of iron, copper or preferably of aluminium, and are about
20 millimeters broad by 2 millimeters thick. As shewn in Figure 3 the metallic
rings are not completely closed but have an opening on the side against the
rubber of the tyre to allow room for the rivets, transverse bands or attachments.
The belt a can be flat but I prefer to give it a convex or bevelled surface as shown
in Figures 4 and 5, so as to diminish the width of the tread.
The protector formed in this manner is united to the elastic tyre by means
of flexible and non-stretching transverse bands d, suitably distributed over the
elastic rim, the said bands being fixed to the belt a on the one hand by means
of a rivet and on the other hand attached to the rim by simple hooks with
hinges as shewn in Figures 4 and 5.
The essential characteristic of this system is the construction of a protector
by means of sectional metallic pieces mounted on belting, which allows the pro-
tector to diminish in length when it comes in contact with the ground. The
arch as shewn in Figure 2 can then coincide with the chord without the metal

page_text: being pressed back upon the tread against the rivets of the transverse bands, as
occurs with metallic plates made in a single piece.
If this kind of protected belt were placed directly on the wheel it would have
the defect of wearing out the rubber of the tyre too rapidly by friction and
pressure caused by the consecutive metal pieces. This defect is obviated by in-
serting between the protected belt and the elastic band thin and flexible metallic
plates e, as shewn in Figure 6. The size of these plates corresponds to that of
the protector and they have a thickness of from 6 to 8 tenths of a millimeter.
Their length about corresponds to the space between two consecutive attaching
bands d. These plates e have a round hole f'at one end and at the other end an
oval hole g, and through these holes rivets r are passed. In consequence of the
hole y being oval, the plate e, when compressed against the ground, is not
squeezed between the two rivets which support it at its extremities, but can slide
between the rubber and the protector without straining the metal.
In vehicles which it is sometimes necessary to make go backwards, the sliding
of the plates both ways can be obtained by making the aforesaid round hole f
oval also.
This kind of protector can obviously be applied to elastic tyres of all kinds,
solid or pneumatic, and to all wheels of carriages, automobile or otherwise, cycles
or motor-cycles. For solid rubber tyres the attachment device of hooks or hinges
can easily be replaced by rivets traversing here and there the thickness of the
rubber and the rim of the wheel, and fixed by nuts to the rim, thus uniting the
solid rubber and the protector, and rendering them entirely untearable.
For the light wheels of cycles the thickness of the sectional plates protecting
the belt need only be from 4 to 6 tenths of a millimeter, the wear on the tread
being insignificant, and to prevent the overlapping of these blades they can be
fixed inside on the belt by means of small rivets..
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what I
claim is:
1. A protective device for elastic wheel tyres consisting of a belt of leather or
other suitable material, provided with metal pieces in juxta-position on both sides
of the belt and adapted to be attached to the tyre by suitable attachment bands,
substantially as described.
2. In a protective device for elastic wheel tyres as claimed in Claim 1 a series
of thin plates attached between the protected belt and the rubber of the tyre by
means of rivets passing through oval holes in said plates, substantially as and
for the purposes described.
Dated the 4th day of January 1900
W. P. THOMPSON & Co..
Of London, Liverpool, Manchester, and Birmingham.