Improvements in Pneumatic Tyres.
Year: 1896

page_text: Date of Application, 27th Feb., 1896
Complete Specification Left, 27th Nov., 1896-Accepted, 30th Jan., 1897
Improvements in Pneumatic Tyres.
LEO THOMAS DARNAULT Engineer of 2 East 132nd Street New York
City U.S.A. do hereby declare the nature of this invention to be as follows:-
The invention has for its object improvements in pneumatic tyres by which such
tyres are rendered easily repairable.
For this purpose, I introduce a suitable quantity of pulverized rubber into the
air-chamber of a pneumatic tyre. On a puncture occurring, these particles are
drawn to the punctured spot by the force of the escaping air, thus diminishing if
not entirely preventing, the further escape of air; or, these particles may be
caused to accumulate on to the said punctured spot by placing the tyre in a
suitable position.
In order to seal a puncture made in such repairable tyres, I introduce through
the puncture a suitable quantity of rubber solution, which by uniting at the
punctured spot with some of the loose pulverized rubber contained within the
air-chamber, and with the inner-wall of said air-chamber, effects the desired
result.
For the same purpose, I may replace the pulverized rubber in the air-chamber
by small pieces of rubber, or combine pulverized rubber with rubber in small
pieces, or I may combine rubber in powder or in small pieces with any other
material or materials in powder or small pieces, or I may use any material or
materials in powder or small pieces without any admixture of rubber whatever,
always provided that such powder or small pieces be entirely free within the air-
tube or chamber.
1 may also replace the rubber solution used in the sealing process herein before
described by any other adhesive substance.
These improvements can be applied to single-tube pneumatic tyres or to those
comprising a sheath, casing or cover and an inner, elastic, inflatable air-tube and
any pneumatic tyre may be converted into my tyre by introducing the above-
mentioned particles into the air-chamber either at the time of manufacture or at
any subsequent time.
Dated this Twenty-sixth day of February 1896
PLETE SPECT
ION.
Improvements in Pneumatic Tyres.
LEO THOMAS DARNAULT Engineer formerly of 2 East 132nd Street New York
but now at 30 Talbot Road Bayswater London 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 has reference to a new method of preparing pneumatic tyres in
order to facilitate the repair of punctures in said tyres.
To accomplish this object, I furnish the air tube with a suitable quantity of
dry pulverized rubber, this powder being quite free and unattached within the
air tube.

page_text: On a puncture occurring, 1 introduce rubber solution through the puncture,
then by placing the tyre in a suitable position the loose powder within the tyre is
cnused to fall over the solution at the punctured spot and the puncture is thus
scaled over within the tube by the union of the rubber solution with some of the
looso powder, the union of the solution and the powder forming an adhesive,
quick-drying, elastic mass or pad, the baso of which i.e. the part in contact with
the inner wall of the tube is composed of the rubber solution and the top surface
of which ie. the part towards the centre of the tube is composed of the pulverized
rubber which being dry and non-adhesive prevents the inner walls of the tube
from being stuck together by the solution and also confines the solution to a small
circumscribed spot just over the puncture.
Instead of using pulverized rubber alone I may use it mixed with some other
pulverized substance or I may use some other substance in powder without the
admixture of any rubber, or I may use rubber or other material in small pieces,
always provided that such powder or pieces shall be quite free and unattached
within the tube, and I may instead of using rubber solution use any adhesive
substance for the purpose stated.
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. The combination with a pneumatic tyre of loose dry, pulverized rubber or
amalgam of rubber within said tyre.
2. An inflatable inner tube for a pneumatic tyre containing loose, dry pulverized
rubber or amalgam of rabber.
3. A single tube or hose-pipe tyre containing loose, dry pulverized rubber or
amalgam of rubber.
4. The within described method of preparing a repairable pneumatic tyre
consisting in furnishing the air tube with loose, dry, pulverized rubber or rubber
amalgam and the within described method of repairing such tyres which consists
in introducing rubber solution through: the puncture by means of a convenient tool
either through the outer cover in the case of a double tube or tube and cover tyre
or directly into the tyre in the case of a single tube or hose-pipe tyre or directly
into the inflatable inner tube itself of a double tube tyre when the cover of such
tyre has been removed, and then placing the tyre in a position that causes some of
the loose powder to fail on to the solution thus forming an adhesive quick-drying
elastic mass or pad within the air tube over the punctured spot as herein set
forth.
5. The combination with a pneumatic tyre of any loose, dry pulverized substance
within said tyre for the purpose stated.
6. An inflatable inner tube containing any loose dry pulverized substance for the
purpose stated.
7. A single tube or hose-pipe tyre containing any loose, dry pulverized substance
for the purpose stated.
8. The combination within a pneumatic tyre of loose, dry rubber powder with
rubber solution or other adhesive substance for the purpose herein set forth.
9. The combination within a pneumatic tyre of rubber solution or other
adhesive substance with any loose dry powder for the purpose herein set forth.
10. The combination with a pneumatic tyre of loose pieces of rubber or other
material within said tyre.
11. The combination within a pneumatic tyre of rubber solution or other
adhesive substance with loose pieces of rubber or other material for the purpose
herein set forth.
Dated this Twont-sid
N 1
1000
L. T. DARNAULT.