Improvements in the Guards of Pneumatic Cycle Tyres.
Year: 1892

page_text: Date of Application, 27th Aug., 1892
Complete Specification Left, 17th May, 1893-Accepted, 1st July, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Guards of Pneumatic Cycle Tyres.
I, WALTER HENLEY, of 154, Tower Street, Hackney, in the Administrative
County of London, Refreshment Contractor, do hereby declare the nature of this
invention to be as follows:-
:-
My invention relates to improvements in the guards of pneumatic cycle tyres.
In carrying it into effect, I provide a suitable number of wire spirals, and these are
laid around the outside of the pneumatic tyre. The respective diameters of these
coils are arranged so as to produce a tread of the desired contour. If they are of
the same diameter, they will present a semi-circular contour. Whereas, if it is
desired that the latter should be nearly flat, this is attained by making the centre
and the outer coils of a smaller, and the intermediate coils of a larger diameter
than the mean one.
or
Instead of the coils being annular, they may be laid across the tread of
the tyre, in either case they are held to the tyre by a band of canvas
other suitable material in which there is formed a pocket to receive them. The
inside of this pocket serves to prevent friction between the coils and the tyre,
while a suitable rubber tread is incorporated with the outer side thereof.
Dated this 27th day of Angust 1892.
PHILLIPS & LEIGH,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Guards of Pneumatic Cycle Tyres.
I, WALTER HENLEY, of 154 Tower Street, Hackney, in the Administrative
County of London, Refreshment Contractor, 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 improvements in the guards of pneumatic cycle and other
tyres and the object of it is to prevent their being punctured. It consists in placing
between the tread of the tyre and the cover thereof, a series of round, flat oval
or flatted wire coils, or convoluted wire bands possessing similar powers of
resistance and resilience, as well as in a special device for keeping them in the
desired position.
The coils and bands are made from any suitable metal wire.
Referring to the accompanying figures which are to be taken as part of this
Specification and read therewith,
Fig. 1 is a section through a wheel rim and pneumatic tyre illustrating the
construction and application of my improved guard made with a flat tread.
Fig. 2 is a similar section illustrating the construction and application of my
improved guard made with a convex tread.
Fig. 3 is a similar section illustrating a modified construction of the guard
illustrated in Figures 1 and 2.
Fig. 4 is a composite side elevation of a cycle wheel the pneumatic tyre of which
is guarded according to the present invention. The construction illustrated in
segments A and B are the same as those illustrated in Figures 1 and 3, respectively.
Segments C and D illustrate, respectively, a further modification and the covering
of the guard and tyre.

page_text: e is the wheel rim and f, the pneumatic tyre. The coils which constitute the
principal feature of my invention are either annular, being laid about or around the
tread of the pneumatic tyre and continued round it side by side; or transverse,
being laid parallel with each other across it. is the cover by which the tyre f
and the coils are held to the wheel rim e. It is made of any suitable material and
may have a rubber tread g' incorporated with it. The cover is made fast to the
rim in any convenient way, either by being cemented thereto as indicated in
Figures 1 and 3, or by a lacing g² as illustrated in Figure 2.
The special device above mentioned for holding the coils in position consists of a
central longitudinal pocket h on the inner face of the cover g. This pocket is
produced in any convenient way, e.g., by fastening the edges of a band h³, narrower
than the cover, to the said face at equal distances from the edges of the cover.
Referring to Figure 1 and segment A, Figure 4, i, are annular wire coils.
They are laid lengthwise side by side in the pocket h, each one being complete in
itself, independent of its neighbours and long enough to meet round the tyre when
the cover is made fast to the wheel rim. 1 do not confine myself in respect
of the number or of the diameter of the coils which I use, but those illustrated in
the figures may be taken as capable of yielding the most favourable results.
The object in making the coils of different diameters is to produce the desired
contour of tread.
A flat tread is secured by making the central coil or coils, as i¹, smaller than
those, i, i, right and left of it or them. The outer coils are of the same diameter,
or nearly so, as the central coil or coils.
Fig. 2 illustrates an arrangement of annular coils by which a convex tread is
obtained. The central coils are larger than the outside ones i, the diameter of
the others decreasing gradually right and left of the central plane.
All the coils may be of the same diameter if preferred, with a corresponding
effect upon the contour of the tread.
According to the modified construction illustrated in Figure 3 and in Figure 4
segment B, the coils are laid in the pocket transversely of the length thereof.
They are set close together and are necessarily of the same diameter.. If desired,
their ends may be sewn down to the material of the pocket.
The modification illustrated in Figure 4, segment C, consists in flatting the
spirals of annular coils down so that the individual spirals are tangential to the
wheel. The spirals are not flattened so much that they are deprived of all
resilience. The direction in which I prefer that they should lie with respect to the
tyre is the one illustrated because they will then be less likely-to pick up and hold
fragments between them.
It must be understood that my invention does not limit me to the particular cross
section or pattern or type of the wire coils that I make use of. The coils may be
replaced by any continuous arrangements of wire convolutions and these may
be in independent lengths or be connected together in the form of a band of
convoluted wire.
h
The pocket may be an independent tube, or a pocket, of suitable cross-section
but adapted to be held between the cover and the tyre by the engagement of the
former with the wheel rim.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is
1. The improved guard for pneumatic tyres consisting of an aggregation of
wire coils or convolutions about or around the tread of the tyre, as set forth.
2. The improved guard for pneumatic tyres consisting of an aggregation of wire
coils or convolutions transverse to the tread of the tyre, as set forth.
3. The combination of pneumatic tyre, cover adapted to hold the said tyre to the
wheel rim, a longitudinal pocket on the inner face of the said cover and wire coils
or convolutions lying side by side therein, as set forth,

page_text: 4. The combination with a cover adapted to hold a pneumatic tyre to a wheel
rim, of a longitudinal pocket on the inner face.of it and wire coils or convolutions
lying side by side therein, as set forth.
5. The combination of a pocket or tube and wire coils or convolutions held
therein, constituting a guard for a pneumatic tyre, as set forth.
Dated this 17th dor of Me 1802
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.