Improvements in or relating to Automatic Stopping for Pneumatic Tyres.
Year: 1897

page_text: Date of Application, 17th Nov., 1897
Complete Specification Left, 17th Aug., 1898-Accepted, 5th Nov., 1898
PROVISIONAL SPECIFICATION.
Improvements in or relating to Automatic Stopping for Pneumatic
Tyres.
I, OSKAR PERGHER, of the Chemical Products Factory, Furth, in the Kingdom
of Bavaria, Apothecary, do hereby declare the nature of this invention to be as
follows:-
My invention relates to a substance for the automatic repair of damaged pneumatic
tyres from the inside. This composition becomes solid at the injured places and
thus automatically fills up the punctured parts. The composition is poured into the
tyre valve by means of a little funnel and the valve is again closed and the tyre
pumped up.
If the tyre is punctured the composition which is at that place and the
rest thereof which flows to it when the wheel is in the required position will in
consequence of this composition set fast and thus close and block up the punctured
holes.
The composition consists essentially of gutta percha dissolved in benzine together
with sugar colour soluble in water and water glass (silicate of soda) zinc white, silica,
and a small quantity of an ethereal oil.
The gutta percha serves to maintain the whole preparation in a state of fluidity in
the compressed air or space, and serves in the case of an outward puncture of the
tyre to cleanse, and at the same time to close up the aperture. The soluble sugar
colour serves as colouring material. The other bodies, such as water glass, zinc
white, and silica close the filled pneumatic tyre so that repeated filling up with air
is avoided. The ethereal oils will give the whole composition an agreeable scent.
5 Improvements in or relating to Automatic Stopping for Pneumatic
Tyres.
I, OSKAR PERGHER, of the Chemical Products Factory, Furth, in the Kingdom of
Bavaria, Apothecary, 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 object of the present invention is a material for the automatic repair of damaged
pneumatic tyres from within, designed to stiffen at the punctured places, and so fill up
automatically the injured parts. The mass is poured into the tube valve through a

page_text: little funnel, whereupon the valve is again closed and the tyre pumped up. In the
case of injury to the tyre, the part of the material which is at that place, and the rest
of the material which flows towards the perforations as the wheel is turned round
will, by reason of its composition, become solid and thus close up the punctures and
render the tyre airtight.
The preparation consists essentially of one part by weight of gutta percha dissolved
in benzine, and one part sugar colour soluble in water, with addition of five parts
water glass (silicate of soda) one part zine white, and one part silica or the like, and
a small quantity of some ethereal oil. The gutta percha dissolved in benzine is added
to the remainder of the composition, i.e. to the water glass, zinc white and so
forth, and then the whole heated over a vapour bath in order to drive off the
benzine which is injurious to the rubber. The guttapercha, is cases of outward
punctures in the tyre, serves to close up the aperture. The remaining ingredients
tend to stop up, that is to cement the injured part. The sugar colour, soluble
in water, serves as a colouring matter. The other bodies also tend to prevent
the escape of air. The ethereal oils give a pleasant aroma to the entire compound.
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 :-
A compound for automatically repairing damaged pneumatic tyres consisting
essentially of one part guttapercha dissolved in benzine, one part sugar colour soluble
in water, 5 parts water glass, one part zinc white and 1 part silica which when
inserted into the pneumatic tyres of cycles makes the said tyres air-tight when
these are injured by solidifying in the punctures and so closing them.
Dated the 16th day of Angust 190°
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.