Improvements in the Covers. of Pneumatic Tyres for Velocipedes.
Year: 1895

page_text: PROVISIONAL SPECIFICATION..
B.
Improvements in the Covers. of Pneumatic Tyres for Velocipedes.
I, HERMANN GRÜTTNER of 69 Krausenstrasse Berlin, Germany, Merchant, do
hereby declare the nature of this invention to be as follows:-
This invention relates to an improved construction of the covers for pneumatic.
tyres, wherein the two edges of the covering are 150 formed as to lock into each
other when wrapped round the tyre.
For this purpose the one edge of the cover is formed with a thickening or fillet
running along it on one or on both sides, such fillet being so formed as to constitute
a single or double hook. The other edge is made a double one, or with a deep
groove in it, the internal surfaces of which are made to correspond with the hook-
shaped external surface or surfaces of the other edge, so that when this is introduced
therein, the two edges will hook into each other and thus form a secure fastening,
the engagement of which is insured by the pressure to which it is subjected between
the pneumatic tyre and the metal rim of the wheel.
The double or grooved edge of the cover may either be formed in one piece with
the same, or the one or both parts of the edge may be formed separately and fixed
to the cover in any suitable manner.
1
The fixing ou of the cover is effected in a very simple and convenient manner.
The pneumatic tyre being first only partially inflated, the cover is wrapped
round, and the edges are hooked into each other, aud the tyre having been fitted on
the wheel so that the joint of the cover is against the metal rim, the tyre is then
fully inflated.
Dated this 26th day of April 1895.
ABEL & IMRAY,
Agents for the Applicant.
Improvements in the Covers of Pneumatic Tyres for Velocipedes.
I, HERMANN GRÜTTNER, of 69 Krausenstrasse, Berlin, Germany, Merchant, 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 relates to an improved construction of the covers for pneumatic
tyres, wherein the two edges of the covering are so formed as to lock into each
other when wrapped round the tyre.
The accompanying drawing shews three constructions of the cover for carrying
out my said invention.
เ
The essential feature consists in forming the one edge of the cover a for the
pneumatic tyre of a hook shape, while the other edge consists of two lappets d
ande which receive between them the hook shaped edge. The hook can either be
made double or single; if made double, it may either have the two hooks arranged
symmetrically as at c Fig. 1., in which case the two lappets & aud e are also

page_text: symmetrical with correspondingly formed counterhooks as shew, or the two hooks
may be unsymmetrical or shifted relatively to each other as shewo at Fig. 3, in
which case the hook shaped lappets d, e, are correspondingly unsymmetrical, the
inner lappet d being shorter than the outer one e, so as to engage with the inner
hook c.
" .1
If the book is made single, it may be of the form shewn at c Fig. 2, in which case
only the lappet d is made with a counter 'hook, the other lappet e only serving to
prevent, by its pressure and frictional contact against c, the disengagement of the
hooked joint. In either arrangement the chook is held so securely between the
lappets and,e, which in their turn are confined between the rim and pneumatic
tyre, that any disengagement of the joint when the tyre is fully distended is
impossible..
d
The above described cover can be made in various ways. The lappets d'and e
can be formed in one piece with the cover a or one or both can be made separate
and fixed on. .J
i
+
The fitting of the cover upon the pneumatic tyre is very simple and convenient:
The cover a is first fitted round the tyre when this is only partially inflated, the
hook c being inserted between the lappets d'and e.
The covered tyre is' then placed round the rim. b, and the tyre is fully
inflated.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim.is:
A fastening for the covers of pneumatic tyres consisting in forming the one edge
of the cover of a single or double hook-shape which is then inserted between two
lappets constituting the other edge of the cover and so formed as to hook into
or lock the hook or books of the first tamed edge substantially as described.
Dated this 15th day of November. 1895.
I
ABEL & IMRAY,
Agents for the Applicant..