Improvements in Pneumatic Tyres for Cycles and other Vehicles.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Pneumatic Tyres for Cycles and other Vehicles.
I, OLIVER SHARVELL HAMMOND, of 102, Pearson Avenue, Toronto, Canada,
Inventor, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide an inflatable tyre, which is capable
of being readily attached and detached, and furthermore, provision is made for
a non-puncturable shield, which will securely protect the aforesaid inflatable
tyre, this shield being secured over the inner tube.
The pneumatic tyre proper is circular in form, the separable portion having
the respective terminals closed air-tight. The terminals are forced to meet with
a lap, each being sloped for this purpose. One terminal has a collar or cuff, into
and through which projects the sloped portion of the other terminal, the latter
having a leather tap or tongue extension perforated to engage a button secured
somewhat back on the other terminal. The joint thus made is snug and smooth.
making no perceptible interruption in the uniformity of the rim. In the forma-
tion of the shield or tyre is embodied a brass wire cablo in each edge of the
tyre, brass being non-corrosive and will not rust the canvass, causing it to rot
and tear off. Transverse or bias canvass laps around the wire cables from the
outside of same and returns around and up on the inside of said cables, about
3 inch, and is cemented fast. The straight canvass on the inner side of the tyre
is cemented fast to the bias canvass, but only comes around to the wire cables,
and only touches them. A strip of good tough leather, 1½ inches wide, is dis-
posed between the two layers of canvass, fast on the tread of the tyre.
An outside covering of rubber is used, being thicker on the tread, this rubber
being only to come around the tyre and down to the wire cables.
The tyre made as above, will be a combination that is untearable, puncture
proof, and very desirable.
Dated thie 20th day of V
T
100
Cycles and other Vehicles.
I, OLIVER SILARVELL HAMMOND, of 102, Pearson Avenue, Toronto, Canada,
Inventor, 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 pertains to certain improvements in Doumatic whod
L

page_text: which improvement is fully set forth in the following specification and accom-
panying drawings in which;
-
Figure 1 is a perspective cross section shewing the construction of my im-
proved pneumatic wheel tyre, Fig. 2 is a view of the inflatable tube, shewing
the manner of attaching the ends thereof; and Fig. the same in detached
position.
The object of my invention is to provide a novel, practical, and efficient device
designed, primarily to obviate the liability to puncture, and secondly to provide
means whereby the tyre and its adjuncts may be easily detached for repairs in the
event of injuries produced by extraordinary causes.
The peculiar construction and exceptional advantages of the invention will
be apparent by referring to the accompanying illustration in which A indicates
the elastic outer tyre, and B the inflatable tube. The former is composed of an
interior layer of canvas or other suitable fabric 2, the fibres thereof being bias
or diagonally disposed in order to resist any tendency to tear or stretch. The
borders of the canvas are folded over wire cables 3 and secured by suitable
cement. The cables are made of bruss instead of iron or steel, which being
likely to corrode, would injure and eventually destroy the canvas. A strip of
puncture proof leather 4, crescent shape in cross-section, is placed upon the
canvas 2, and overlaid by a strip of straight fibred canvass 5, the borders of which
extend downwardly to the cables and are cemented to the inner canvass 2. The
leather strip is sufficiently wide to guard the inner parts of the tyre against
injury from ordinary causes, but not so wide as to interfere with the elasticity
of the outer rubber fabric 6, which is reinforced on its treading surface and
extends downwardly to the cables on each side, overlapping the canvas strip 5,
to which it is securely attached by cement.
It will be observed that if a tack or pointed fragment of glass should pene-
trate the rubber and the adjoining canvas strip the nature of the fabric is such
that a large number of threads must be severed before it gives way, and if by
reason of an extraordinary puncture is should do so the inner strip of canvas
will hold the tyre together.
The inflatable tube B is formed with tapering ends as shewn in the drawings.
A rubber collar 7 is suitably attached to one end, the other having a strip or tongue
of canvas 8 attached thereto by cement. The ends of the tube are joined by
drawing the tongue through the collar and fastening it to the hook or button 9.
It will be seen that in the event of possible damage to the tube it may be
detached, repaired and replaced without difficulty or delay.
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
The combination with the pneumatic tyre B, having an elastic collar 7 at
one end and cut away, part in rear thereof, the button 9 secured to said tube.
and the tongue 8 secured to the tube and passing through the said collar and
engaging with the button 9, of the elastic tyre A having the edges turned in-
wardly, the wires to which the said turned in edges are secured, the layer 5, of
textile material, and the crescent shaped strip 4 of leather and the lining 2
of textile material substantially as described.
Dated this 30th day of August 1898.
'