An Improved Pneumatic Tyre with an Airtight Band for Bicycles, Vehicles, and the like.
Year: 1896

page_text: Date of Application, 14th July, 1896
Complete Specification Left, 14th May, 1897-Accepted, 26th June, 1897
PROVISIONAL SPECIFICATION.
An Improved Pneumatic Tyre with an Airtight Band for Bicycles,
Vehicles, and the like.
FREDERICK JAMES COLES 99 Old Town Street Plymouth Tea Merchant
do hereby declare the nature of this invention to be as follows:-
Part 1. being a detachable band of rubber or other material, to be stretched
tightly around in groove of wheel, the band to be grooved on inner sides against
wheel, leaving a portion of the flat part of band to press against inside of tyre
(being part No. 2) all round so as to keep air tight when in position.
Part 2. to be composed of rubber or other material and opened all round in
centre with beads running round on the inner sides near the edges of tyre and to be
pressed in between band (Part 1) and wheel so as to fit in grooves of band (Part 1).
Therefore by pressure from band forming and making a complete single detachable
tyre, and when in position in band to be inflated for use.
Dated this 13th day of July 1896.
FREDERICK JAMES COLES.
An Improved Pneumatic Tyre with an Airtight Band for Bicycles,
Vehicles, and the like.
I, FREDERICK JAMES COLES of 99 Old Town Street, Plymouth, Tea Merchant,
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 :-
My invention relates to an improved, so called, "tubeless" pneumatic tyre for
bicycles, tricycles and other vehicles.
The tyre consists of two parts, made of rubber or other suitable material, one of
which is made in the form of a band stretched around the groove or hollow in the
rim or felloe of the wheel and is provided with a dovetail groove; while the other
part is made in the form of a band which practically forms a tube when in position
in the rim and it is provided with beads all round on the inner edges, which beads
take into the dovetail groove in the firstly described part. Or the two bands may
be solutioned together or made in one, and the fastening will then be single instead
of double. When the tyre is inflated the band firstly described will form an
airtight joint between and over the edge or edges of the other band.
Figure 1 of the accompanying sheet of drawings is a transverse section of a
"tubeless" pneumatic tyre constructed according to my invention.
Figures 2 and 3 are similar views of modified forms.
Figure 4 is a perspective view partly in section of another modification.
Figure 5 is a perspective view partly in section of an inner band.

page_text: Figure 6 is a similar view showing how an inner band may be partly strengthened
or stiffened by fabric.
Figure 7 is a transverse section of a modification and
Figure 8 is a similar view of another slightly modified form.
Referring to Figure 1 it will be seen that the outer band A. is practically bent
into tubular form to fit into the rim of a wheel, the two edges or margins being
brought together in the rim and being formed with beads A¹ A' which are
enclosed in the dovetail groove of an inner elastic band B fitting tightly all
round the rim, it being understood that the band B is provided with a valve
tube C, see Figure 4, for the purpose of inflation. The tyre shown in Figure 1 is
provided with an insertion A of canvas or other suitable fabric which goes all
round the outer band A and round the beads A' parallel with the outside to
stiffen or strengthen the tyre.
Referring to Figure 2, the tyre is here shown provided with an insertion A
of canvas or other suitable material which goes all round the outer band A but
does not extend round the beads A' as shown in Figure 1. The inner band B is
also provided with flap or extensions B¹ which tend to improve the joint between
the inner and outer bands.
Figure 3 shows a very similar tyre with flaps B₁ still wider than shown in
Figure 2 and with a suitable insertion A going all round inside the outer band A
and the beads A¹.
Figure 4 represents a similar tyre but the insertion A³ is made to go all round
the inside of the band A and entirely round the outside of the beads A'. The
flaps B are also made wider than any of those hereinbefore referred to. The
valve or valve tube designated by the letter C is attached to the inner band B and
the beads A' of the outer band are conveniently cut away at that place to fit the
valve tube.
Figure 5 represents an inner band B with flaps B¹ and
Figure 6 shows how such a band may be strengthened or stiffened by insertion B'
if desired.
Figure 7 represents a tyre in which the outer band A is as before bent in a
practically tubular form to fit into the rim of a wheel, but the margin A³ is
solutioned or otherwise fixed in position in the dovetail groove of the elastic band B
while the margin A¹ fits into the remaining space in the groove. It has been
found that a tyre constructed in this manner is more easily attached and detached.
Figure 8 represents the tyre A made in one with the band part B and the
margin A fitting into the dovetail groove in the said band part B. There may if
desired be provided a flap B' as aforesaid and the valve or valve tube is preferably
carried through the part B as indicated by the letter C.
In both Figures 7 and 8 the dovetail groove is made with rounded corners and
the margins A and A³ or the margin A if there be only one are or is also made
with rounded corners to correspond, as it has been found that so constructed the
tyre is more easily attachable and detachable than when the said corners are
sharp.
Although I have shown various-modifications I would state that I do not limit
myself to the exact arrangements or constructions shown as I may vary same
without departing from my invention.
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.
1. A tubeless pneumatic tyre consisting of an outer band (A) provided with
beads (A) at its edges and an inner band (B) having a dovetail groove to embrace
the beads (A) and means for inflating the tyre substantially as set forth.
2. A tubeless pneumatic tyre consisting of an outer band (A) provided with
beads (A) at its edges, an inner band (B) with flaps or extensions (B) and a

page_text: dovetail groove to embrace the said beads (A') and a valve tube (C) substantially
as set forth.
3. A tubeless pneumatic tyre consisting of an outer band (A) provided with a
bead (A) at one edge solutioned or attached in a groove in an inner band (B)
which groove also embraces a bead (A') at the other edge of the outer band and
means for inflating the tyre substantially as set forth.
4. A tubeless pneumatic tyre consisting of an outer part (A) having a bead (A')
and an inner part (B) with a dovetail groove into which the bead (A¹) takes
and means for inflating the tyre substantially as set forth.
5. The constructions of tubeless pneumatic tyres substantially as described and
shown on the drawings.
Dated the Fourteenth day of May 1897.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.