A New or Improved Safety Cellular Pneumatic or Cushion Tyre.
Year: 1892

page_text: Date of Application, 29th Nov., 1892-Accepted, 7th Jan., 1893
COMPLETE SPECIFICATION.
A New or Improved Safety Cellular Pneumatic or Cushion Tyre.
I, RICHARD PAPPERITZ of 3 Usedorn Strasse, Berlin, in the Empire of
Germany, 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 :-
The safety cellular pneumatic tyre represented in the drawings hereunto annexed
and hereinafter described is designed to make such a tyre capable of use after
puncture or damage to the outside or inside parts of the same and to render it
possible to easily repair same in a short time even at the spot or place where such
damage has happened.
In the accompanying drawing
Fig. 1 represents a longitudinal section through the tyre i.e. in the direction of
its length in the felloe or rim of the wheel.
Fig. 2 is a cross section of the tyre on the wheel rim or felloe-on a greatly
enlarged scale.
Fig. 3 shows the tyre fastened to the felloe-looking in the direction of the
arrow.
Fig. 4 is a view of a slightly different shaped cell or separate air vessel of which
the tyre is built up.
Figs. 5 and 6 are suitable keys for putting the tyre on the felloe.
The essential part of the invention consists in the substitution in place of the
usual single tube filled with air of a number of separate cells of india rubber or the
like filled with air and in the fastening of the same by a surrounding bandage
covering or wrapper by which the whole of the said cells are enclosed to form the
cushion around the circumference of the wheel.
The new elastic hollow tyre consists of:-
(1) A series of enclosed rubber cells of suitable form filled with air.
(2) A strong linen hose (or similar covering or coverings) serving for binding
and holding the cells which covering encloses also the felloe outside the cells as
well as the said cells :.
3
(3) A protecting rubber cover or wearing.surface g which so far as it lies upon
the felloe is united to the linen hose 1 by a solution of rubber or otherwise-and
vulcanised inside and outside but otherwise than where is doubled back on 9 just
over the felloe (see Fig. 2) the said outside cover 9 lies loosely on the inside
cover l.
The edges of the outer covering 9 are in the manufacture overlapped and so
surrounded by the inner covering (as shown in Fig. 2) that they form strong
wrapping edges and along each edge there is placed a stout pliable tough wire y.
These metal threads or wires y pass out of the edge at intervals-in the manner
shown in Fig. 3-and form loops which are secured on to the pins d (which latter
are rivetted on the back of the wheel felloe for otherwise fastened to the felloe)
and tightly hold the tyre.
For putting on the wrapper that is to draw the loops over the studs d use may
be made of keys such as shown in Figs. 5 and 6 which for this purpose have at one
end a depression fitting the pins d so as to thus firmly draw over the loops y on the
pins d.
=
As a filling between the cells and the cover one or more extra linen or other
strips (see Figs. 1 and 2) are stitched or secured upon the inside of the said
cover so that upon the bringing of the edges of the bandage or wrapper together
upon the back of the felloef (as aforesaid) the edges of the strips and lie close
on to the edge of the felloe."

page_text: This covering or wrapper for the cells is finally covered-on the inside next
the cells with silk the object of this being to reduce to a minimum the friction
which takes place upon the cells and the walls of the surrounding cover or
wrapper.
If now the enclosing wrapper is punctured or cut and one of the cells z punctured
or damaged the same will lose its tension form and shape (ie. will collapse) whilst
both the adjacent cells will expand so that (with little friction on the walls) they
will gradually approach each other that is to say the gap which has occurred will
be thereby filled up so that such injury to the pneumatic tyre is automatically
repaired.
In case of injury happening to this tyre (that is suppose one or several of the
cells have been punctured and have collapsed) such collapsed cells may be
replaced by new ones with but little trouble and which is easily quickly and
securely executed on the spot by unloosing the wrapper (by removing loops y off
studs d) putting in new cell or cells z and the firmly securing again the bandage or
wrapper by straining the loops y over the studs d again.
2
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. A safety cellular tyre for road wheels consisting of a number of separate
elastic cells such as z arranged all round the circumference of the wheel and held
in the fellce and enclosed and covered in by a suitable wrapper or cover which
latter is arranged and secured to the felloe of the wheel in any suitable manner
said wrapper being arranged and constructed to act substantially in the manner
and for the purposes hereinbefore described and illustrated in the drawings
hereunto annexed.
2. Constructing tyres for the wheels of road vehicles of a number of separate
cells such as in combination with an enclosing removable wrapper or cover which
latter serves both to hold said cells in position and on its outside serves as wearing
surface to the tyre substantially in the manner and for the purposes hereinbefore
set forth.
Dated thin 20th day of November 1892.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.