Improvements In anu соплестеа with Pneumatic Tyres Ior Bicycles, Tricycles, and other Road Vehicles."
Year: 1897

page_text: Improvements
In anu соплестеа with Pneumatic Tyres Ior
Bicycles, Tricycles, and other Road Vehicles."
I, EDWARD AYEARST REEVES of The Royal Geographical Society No. 1 Savile Row
in the County of Middlesex Assistant Curator of Maps do hereby declare the nature
of this invention to be as follows:-
My invention relates to improvements in pneumatic tyres for bicycles tricycles and
other road vehicles whereby the mere revolution of the wheel on the ground when
running will cause the tyre to be inflated and kept full automatically.
The tyre or usual air tube is provided with and connected to an inner air tube
next to and going wholly or partly round the rim of the wheel one end of which
inner tube is provided with a small opening sufficient to allow of the entry of air but
not of more dust or foreign matter than can be helped. In fact it will under some
circumstances be advantageous to provide the open end of the tube with a filter.
The open end of the tube may be carried up above the level of the rim, say as far
as the middle of the wheel, in order to keep the opening as far away as possible from
dust, dirt or the like. When the wheel is revolved the weight of the rider and the
vehicle or the weight of the vehicle alone will be sufficient to compress the inner
tube, which is preferably made of thinner or more pliable material than the usual air
tube, and cause its sides to form a joint and as the wheel continues to revolve the
parts of the tube meeting all along its length will cause the air therein to be forced
forward into the tyre or usual air tube.
The inner tube aforesaid with the usual air tube may be enclosed in an outer cover
and instead of having one inner tube there may be several. The inner tube and the
usual air tube may also if desired be made in one, care being taken that where one
tube end overlaps the other there shall be no bulge. There may if desired be applied
to the air opening a valve which will allow of the entry but not the exit of air and
there may also be a similarly working valve in the inner tube or at the junction
thereof with the usual air tube, but preferably this valve will not be inside the tube,
but outside and connected by tubing.

page_text: "Improvements in and connected with Pneumatic Tyres for
Bicycles, Tricycles, and other Road Vehicles."
I, EDWARD AYEARST REEVES of The Royal Geographical Society No 1 Savile Row
in the County of Middlesex Assistant Curator of Maps 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 pneumatic tyres for bicycles tricycles and
other road vehicles whereby the mere revolution of the wheel on the ground when
running will cause the tyre to be inflated and kept full automatically.
Fig. 1 of the accompanying sheet of drawings represents part of a rim and tyre in
longitudinal section.
Figure 2 is a transverse section thereof on line a b fig. 1 and
Figure 3 is a similar view of a modified form
Refering to Figures 1 and 2 the tyre or usual air tube g is provided with and
connected to an inner or air tube i next to and going wholly or partly round the rim
of the wheel one end of which inner tube is provided with a small opening
sufficient to allow of the entry of air, but not of more dust or foreign matter than can
be helped. In fact it will generally be advantageous to apply to the air opening i a
valve m of ordinary construction and having a filter k. The filter and valve may be
at the end of a tube proceeding from the tube i and carried up above the level of the
rim and, say, as far as the middle of the wheel in order to keep the opening to the
filter as far as possible away from dust dirt or the like. When the wheel is revolved
the weight of the rider and of the vehicle or the weight of the vehicle alone will be
sufficient to compress the inner tube i which is preferably made of thinner or more
pliable material than the air tube g, and will cause the sides of the said inner tube i
to come together and form an airtight joint. As the wheel continues to revolve the
parts of the tube i meeting all along its length will cause the air therein to be
forced forward into the tyre or usual air tube g and in practice it is found
convenient for instance to cause the air to pass through the valve h and.
through the pipe g¹. In the example referred to, the air tube g is made thicker or
less pliable at that part which is in contact with the pumping tube i so as to ensure
the meeting of the sides of the latter as before referred to.
In the modification shown in Figure 3 the ordinary air tube g may be further
stiffened by the insertion of a band g² of metal, celluloid or the like. This band may
either be inserted during the manufacture of the tube or it may be put on afterwards
either by cementing or in any other convenient manner.
The
The inner or pumping tube i with the usual air tube g may be enclosed in an
outer cover and instead of having an inner tube there may be more than one.
pumping tube i and the air tube g may also if desired be made in one each of which
may go partly round the rim or they may go wholly round the rim and side by
side.
It is evident that if the pumping tube only goes partly round the rim of the
wheel, the air tube must be increased in dimensions at that part where there is no
pumping tube so as to leave the tyre perfectly true when the wheel revolves. The
valve m Fig 1 is made to normally allow of the entry but not the exit of air and the
other valve h is similarly constructed and when placed outside as shown is easily got
at for adjustment, renewal or repairs.
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.

page_text: pliable pumping tube or tubes going wholly or partly round the rim of the wheel,
one end of said tube or tubes being connected to a valve with or without a filter and
the other end of said tube or tubes communicating through another valve with the
air tube substantially as shown and described.
2. The constructions of tyres shown on the drawing.
NOVI 1897.
JENSEN & SON
77 Chancery Lane Lane London W C Patent Agents.