Improvements in Pneumatic Tyres for Road Vehicles.
Year: 1897

page_text: Date of Application, 3rd June, 1897
Complete Specification loft 3rd Mon 1000
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Date of Application, 3rd June, 1897
Complete Specification Left, 3rd Mar, 1900, Accepted, 9th Apr., 1896
PROVISIONAL SPECIFICATION.
F
Improvements in Pneumatic Tyres for Road Vehicles.
I, OCTAVIUS MARCH, of 53,. Victoria Street, Westminster, in the County of
London, Electrical Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention for improvements in pneumatic tyres for road vehicles has. for
its object an improved method of fixing the outer cover of pneumatic tyres.
Now according to this invention a false rim is inserted between the air tube and
the rim and the edges of the outer cover are placed between the false rim and the
rim. The false rim grips the edges of the cover between itself and the rim.
In one way of carrying out this invention an ordinary concave or hollow rim
is used and within the hollow. rim is a similar false rim having inturned edges.
The false rim is in one piece preferably having free overlapping ends. The edges
of the outer cover are thickened so that when the false rim is forced inwards they
are firmly held between the rim and the inturned edges of the false rim. The
false rim is forced inwards by its own elasticity, it being made somewhat smaller
than the rim and sprung into place.
Dated this Third day of June 1897
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Pneumatic Tyres for Road Vehicles.
I, OCTAVIUS MARCH, of 53, Victoria Street, Westminster, in the County of
London, Electrical Engineer, 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:--
This invention for improvements in pneumatic tyres for road vehicles has for
its object an improved method of fixing the outer cover of pneumatic tyres.
Now according to this invention a false rim is inserted between the air tube and
the rim and the edges of the outer cover are placed between the false rim and the
rim. The false rim grips the edges of the cover between itself and the rim.
In one way of carrying out this invention an ordinary concave or hollow rim
is used and within the hollow rim is a similar false rim having inturned edges.
The false rim is in one piece preferably having free overlapping ends. The edges
of the outer cover are thickened so that when the false rim is forced inwards they
are firmly held between the rim and the inturned edges of the false rim. The
Price 8d.]

page_text: false rim is forced inwards by its own elasticity, it being made somewhat smaller
than the rim and sprung into place.
The false rim c
In the accompanying sheet of illustrative drawings: Figs. 1, 2, 3 and 4 are
cross sections showing four slightly modified pneumatic tyres constructed according
to this invention and Fig. 5 is a part longitudinal section of the same.
The outer cover a of the tyre is formed with thickened edges b.
consists of a light band having inturned edges d and having preferably free over-
lapping ends. The false rim is preferably sprung into the rim and the edges b
The cover is thus held
of the cover are inserted under the edges d of the false rim.
in position without inflation. When the inner tube e is inflated it draws up the
edges of the over cover and firmly locks them between the rim and false rím as
clearly shown.
The modifications Figs. 2, 3 and 4 show the tyre applied to ordinary flat or road
rims and also slight modifications of the thickened edges of the cover and in-
turned edges of the false rim. In order to prevent the tyre from being forced off
-sideways saddle shaped clips f are placed over the rim at suitable intervals.
The valve g of the inner tube, passes through the false rim and may secure the
air tube to the false rim. The valve may also pass through the overlapping ends
of the false rim one or both of the said ends being slotted to allow of the expanding
and collapsing moveinent.
When the cover and false rim are in place, the cover can be firmly fixed by
drawing the false rim by means of the valve firmly against the rim. Whilst I
have described a rim with overlapping ends, it is to be understood that this, is the
construction I prefer, but an endless false rim or a rim with a butt joint will answer
more or less the same purpose.
It is impossible for a tyre constructed as above described to blow off the rim for
the greater the pressure of inflation, the more firmly is the false rim and rim caused
to grip and hold the thickened edges of the outer cover.
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 I
claim is:-
1. Securing the cover of the pneumatic tyre to the rim by means of the false rim
or band substantially as described.
2. The improvements in pneumatic tyres substantially as described with reference
to the drawings.
31 Ja of Wahman 1898
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.