Improvements in or relating to Pneumatic Tyres.
Year: 1895

page_text: Date of Application, 27th Aug., 1895
Complete Specification Left, 27th May, 1896-Accepted, 13th July, 1896
PROVISIONAL SPECIFICATION.
Improvements in or relating to Pneumatic Tyres.
We JOHN BOWLAND of Broom Road Bowdon in the County of Chester,
Salesman, and GEORGE HUTCHINSON of 121 West-park Street, Salford, in the
County of Lancaster, Farmer, do hereby declare the nature of this invention to
be as follows:
The principal object of this invention is to reduce the inconvenience caused by
the puncturing of a pneumatic tyre, and the invention consists in fixing around a
suitable rim a series of separate inflatible chambers or segments of spherical or
other desirable form, each provided with a separate back pressure valve for
inflation, all the valves being connected to a single tube or passage provided with
an inflating nozzle or valve.
Each chamber is or may be formed by a suitable indiarubber bladder provided
at its air inlet with a nut or other means of attachment to a back pressure valve.
This valve is fixed to or otherwise communicates with a tube or passage extending
around the rim on the under or inner side thereof.
Each bladder is by preference provided with a strong covering of suitable form
and material to protect it from puncture, and we prefer to strengthen or thicken
this cover at that part where it comes in contact with the ground, so as to form a
suitable tread for the tyre.
'The rim of the wheel is provided also with a series of sockets, or is otherwise
suitably formed to retain the bladders and their covers in position; and these
sockets (or the rim) should be so made as to retain the cover in position even when
the bladder is deflated; this can be effected by making the covers with an external
bead around (or at parts of) the edge thereof, engaging with an inward ledge or
projection or projections at the edge of the socket or the rim.
It will be seen from the foregoing description that all the chambers or segments
can be inflated at once, but if one becomes punctured it will hardly interfere at all
with the utility of the wheel to which our improved tyre is applied, as the segments
may be very short.
Dated this 26th day of A navet 1895
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in or relating to Pneumatic Tyres.
We JOHN BOWLAND of Broom Road, Bowdon, in the County of Chester,
Salesman, and GEORGE HUTCHINSON, of 121 West Park Street, Salford, in the
County of Lancaster, Farmer, 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 :-
The principal object of this invention is to reduce the inconvenience caused by
the puncturing of a pneumatic tyre; and the invention consists in fixing around a
suitable rim a series of separate segmental inflatible chambers of suitable form, each
| Price 8d I

page_text: provided with a separate back pressure valve for inflation, all the valves being
connected to a single air passage made in the rim of the wheel and provided with
an inflating nozzle or valve.
The invention will be readily understood from the following description on
reference to the accompanying drawings.
Figs. 1, 2 and 3 shew a tyre with metal rim.
Figs. 4 and 5 a tyre with a wooden rim.
a is is the rim of the wheel, b are the separate segmental air chambers; and we
would here remark that we are aware that spherical air chambers and balls have
been used before, with or without covers, and that such form no part of this
invention.
Each chamber bis or may be formed as seen on the drawing of a suitable
india bladder b provided at its air inlet with a back pressure valve c, see detached
view Fig. 3. The drawing (see Fig. 3) shews the valve c made with a flange
which holds the bladder to the socket and rim of the wheel, the said valve being
screwed into the said socket and rim. This valve c is fixed into or otherwise
communicates with a passage d extending around the rim a on the under or inner
side thereof, without the use of a special tube.
Each bladder is by preference provided with a strong covering of suitable
form and material to protect it from puncture, and we prefer to strengthen or
thicken this cover at that part where it comes in contact with the ground, so as
to form a suitable tread for the tyre.
The rim of the wheel is provided also with a series of sockets a' see Figs. 1,
2 and 3 or is otherwise suitably formed see Figs. 4 and 5 to retain the bladders b
and their covers in position; and these sockets a¹ (or the rim, see Figs. 4 and 5)
should be so made as to retain the cover in position even when the bladder b is
deflated; this can be effected by making the covers with an external bead b+ around,
or at parts of (see Figs. 4 and 5) the edge thereof, engaging with an inward ledge
or projection or projections at the edge of the socket a¹ (see Figs. 1, 2, 3) or the
rim a (see Figs. 4 and 5).
It will be seen from the foregoing description that all the chambers or segments /
can be inflated at once, by means of a single valve e Fig. 1, but if one become
punctured it will hardly interfere at all with the utility of the wheel to which our
improved tyre is applied, as the segments 6 may be very short as shown on the
drawings.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
The combination with a series of segmental inflatible air chambers or bladders
provided with valves, of a rim provided with sockets or so formed as to retain
the said chambers in place even though deflated and so made as itself to form
an air space with which the inlet valves of the inflatible air chambers or bladders
communicate, such space being provided with a suitable inflation valve as herein-
before set forth and illustrated by the annexed drawings.
Dated the 26th day of May 1896.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.