Improvements in or connected with Pneumatic Tyres.
Year: 1897

page_text: Date of Application, 21st Sept., 1897
Complete Specification Left, 13th July, 1898-Accepted, 13th Aug., 1898
PROVISIONAL SPECIFICATION.
Improvements in or connected with Pneumatic Tyres.
WE, HIRAM STEVENS MAXIM, of 18, Queen's Gate Place, in the County of
Middlesex, Chevalier of the Legion of Honour, Civil and Mechanical Engineer,
and ROBERT DRYDEN BROWN, of 47, Ronald's Road, Highbury, in the County of
London, Engineer, do hereby declare the nature of this invention to be as
follows:-
D
This invention relates to that kind or class of pneumatic tyre wherein the outer
cover is provided at each of its edges with a flat metallic band or strip, said
bands or strips being adapted to rest side by side on the wheel rim. When the
cover is in place on the wheel rim the adjacent edges of these bands or strips
do not tightly butt or meet together and therefore the wall of the inflated air
tube in proximity to the adjacent edges of the said bands is frequently burst or
ruptured by being blown or forced between them into the lower part of the
trough of the rim. The chief object of our invention is to avoid this disadvan-
tage.
or
A further object of our invention is to provide means whereby the recess
aperture that is cut in the said bands to permit of the passage of the valve stem,
shall not weaken or otherwise impair such bands.
According to our invention we provide one of the edges of the cover with a
metallic or other flat band or strip of a similar width to that heretofore used,
while the band on the other edge of the cover is broader and overlaps the narrow
band when in position on the wheel rim. We thus provide a flat and continuous
bed or rest for the air tube.
In some cases we may provide on one edge of the cover two bands between
which the band on the other edge of the cover fits. Either the broad band or the
narrow band may be duplicated in this manner. Or we may provide a broad
band and a narrow band on one edge of the cover (the broad band preferably
being placed next the rim), and a single broad band on the other edge of the
cover.
With this construction of outer cover it is necessary to perforate or to cut away
a portion of the band or bands to permit of the passage of the valve stem, and
such perforation or the like would be liable to weaken and cause a fracture of the
band at that point. We therefore strengthen said band by the addition of a
strip of metal or other rigid material, according to the material of which the band
is formed, which strip extends for a short distance on either side of the perfora-
tion or the like. Said strip may be bent over and wrapped around said band or
it may be brazed thereto; and it may be of the same width as the broad band,
or it may be the full width of the bands when they are in position on the wheel
rim.
Doted thin 01at day of Santamban 1807
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicants.

page_text: Improvements in or
n or connected with Pneumatic Tyres.
WE, HIRAM STEVENS, MAXIM, of 18, Queen's Gate Place. in the County of
Middlesex, Chevalier of the Legion of Honour, Civil and Mechanical Engineer,
and ROBERT DRYDEN BROWN, of 47, Ronald's Road, Highbury, in the County of
London, 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:
-
This invention relates to improvements in pneumatic tyres of the kind set forth
in the Specification of Patent No. 9647 of the year 1893 granted to Edmund Hill
and known as the "Ixion" tyre, wherein the outer cover is provided at each of
its edges with a flat metallic band or strip, these bands or strips being adapted
to rest side by side on the wheel rim. It has been found that when the cover is
in place on the wheel rim there is a liability of the adjacent edges of these bands
or strips failing to tightly butt or meet together and therefore the wall of the
inflated air tube in proximity to the adjacent edges of the said bands is frequently
burst or ruptured by being blown or forced between said bands or strips into the
lower part of the trough of the rim. According to our invention we overcome
this disadvantage by constructing said bands so that the edge of one of them
will overlap the edge of the other, or by providing two bands on one edge of
the cover between which the band on the other edge of the cover is adapted to.
enter.
We also provide means whereby the recess or aperture that is cut in the said
bands to permit of the passage of the valve stem, shall not weaken or otherwise
impair such bands, the said means comprising a short strip of metal or other
rigid material which is applied to the band at the part where the valve stem
passes through it.
In order that our invention may be clearly understood and readily carried into
effect we will describe the same more fully with reference to the accompanying
drawings, in which:
Figure 1 represents in cross section a tyre constructed according to our inven-
tion having one broad and one narrow band or strip.
Figure 2 is a similar view of a tyre having a broad and a narrow band on
one edge of the cover and a broad band on the other edge.
Figure 3 is a similar view of a slightly modified form of the tyre illustrated
in Figure 2.
Figures 4 and 44 are respectively a plan and a transverse section of that part
of the bands or strips adjacent to the air valve, showing the strengthening strip.
Figures 5 and 5 are similar views of a slightly modified arrangement; and
Figures 6 and 6* are similar views showing the strengthening strip formed with
a projecting portion or lug through which the valve hole is made.
In Figures 4 to 6 the fabric of the inextensible jacket is represented as par 4
tially removed in order to show the bands more clearly.
In all the figures like letters of reference indicate similar parts.
A is the air-tube, B the inextensible jacket, C the outer cover or 'tread attached
to such jacket, D the wheel rim, and E the air valve. The fabric forming the
jacket is, at each edge thereof, secured around a metallic or other band or 4
strip 6, 61. The ends of each separate band overlap in the same manner as de-
scribed in the aforesaid prior specification.
Referring now to Figure 1, one of these bands, b, is of the same width as here-

page_text: tofore, but the opposite band b¹ is of greater width and overlaps the inner edge
of the band b. A continuous and firm bed is thus provided for the air tube.
As above mentioned we sometimes provide one edge of the jacket with two
bands between which the edge of the opposite band enters. Two broad
bands may be arranged opposite a single narrow band, or two narrow bands oppo-
site a single broad band. Or we may employ a broad band 2 and a narrow
band b attached to one edge of the jacket, and a broad band 61 attached to the
opposite edge, as shown in Figure 2. Instead of causing the edge of the band b
to overlap the edge of the band b¹, we may as shown in Figure 3, so arrange it
that the adjacent edges abut, and the surfaces of the bands are flush; the band 2
would then prevent any rupture of the air-tube should the bands and b¹ be
separated sufficiently to allow the walls of such tube to pass between them.
Referring now to Figures 4 to 6, we attach to the band or bands, at that
portion thereof adjacent to the perforation through which the valve stem passes,
a strengthening or reinforcing strip or piece e. This strip may be secured to the
band by brazing as shown in Figure 4 or by rivetting as shown in 6^, or by
being wrapped around the band as shown in Figure 5. Figures 4 and 4* show an
approximately centrally arranged valve which clears the band b, so that it is not
necessary to form a recess in this band for the passage of the valve stem.
Figures 5 and 5* show an arrangement wherein the valve is not central and a
recess is cut in the band b as shown at e*.
We may sometimes so form the bands and strengthening piece that recesses
only are required in the bands. Such a construction is shown in Figures 6 and 6^
wherein it will be seen that the piece e has a projecting portion or lug e¹ in which
the valve hole is formed.
If desired the said bands may be made of equal width and be notched for the
reception of the air valve, the bands at such parts being strengthened by plates
or otherwise.
It will be readily understood that, although we have illustrated the strength-
ening strip or piece only in connection with one broad and one narrow band, the
device is equally applicable in cases where more than two bands are employed;
and if desired two or more of the bands may be provided with a strengthening
strip.
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 a tyre of the kind hereinbefore referred to, the construction of the bands
at the edges of the cover in such manner that one will overlap or fit into the
other substantially as described and for the purpose specified.
2. In a tyre of the kind claimed above, the means for strengthening the portion
of the band through which the valve stem passes, substantially as described.
3. A pneumatic tyre constructed substantially as described with reference to
one or other of the arrangements illustrated in the accompanying drawings for
the purpose specified.
Dated this 13th day of July 1898.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicants.