Improvements in the Mode of and Means for Repairing Pneumatic Tyres.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Mode of and Means for Repairing Pneumatic
Tyres.
I WALTER GRIFFITHS of Highgate Square Moseley Road Birmingham in the
County of Warwick Manufacturer, do hereby declare the nature of this
invention to be as follows.
My invention has for its object Improvements in the mode of and means for
repairing Pneumatic tyres, by which in case of puncture such tyres can easily
repaired without removing the tyre from the wheel or the wheel from the machine
or vehicle. In carrying my invention into effect I provide an instrument having
three Flexible steel prongs mounted and arranged so as to form when closed
together at the point a sharp pointed steel tube which can readily be pressed
through the rubber of the tyre.
In the base of the handle a tube is mounted to screw within the prongs in such
a manner that the forward movement of the tube opens the prongs. Within the
tube a sliding ram rod is provided for purposes hereinafter to be described.
Flanges are provided upon the prongs at a suitable distance to prevent the instru-
ment from being inserted too far within the tyre and flanges are also provided at
the top of the prongs to enable the instrument to be retained in
position afer being pressed into the tyre. For preparing the instrument for the
repair of a puncture a suitable piece of repairing rubber is first connected at its
centre to a thread by means of a needle or other suitable means and is covered
one side with rubber solution after which it is drawn into the tube from the front
end sufficiently to be fully enveloped by the tube. The tube is then withdrawn
until the prongs close to a point, upon which the instrument is ready for use.
The action of repairing a puncture is as follows. The point of the prongs is
inserted into the puncture and retained there while the tube is screwed forward
until the prongs are forced onen and the front of the tube inserted in the tyre after
which the sliding ram rod is pressed down the tube thereby pressing the piece of
repairing india rubber into the tyre and by means of pumping fresh air into the
tyre or by the force of the air remaining in the tyre the repairing india rubber
is opened out against the inside of the air tube or cover and the solution on the
repairing piece adhering to the same the pressure of the air continues to press the
repairing rubber disc against the puncture after the instrument is withdrawn
thereby repairing the puncture in a most effective manner while little or no air
can escape during the insertion of the instrument.
Dated this 10th day of November 1896.

page_text: COMPLETE SPECIFICATION
Improvements in the Mode of and Means for Repairing Pneumatic
Tyres.
I WALTER GRIFFITHS of Highgate Square Moseley Road Birmingham in the
County of Warwick Manufacturer 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:-
My invention has for its object "Improvements in the mode of and means for
the repairing of Pneumatic tyres" by which in case of a puncture such tyres
whether of single or double tube can readily be repaired without removing the
tyre from the rim or the wheel from the machine.
In order that my invention may be clearly understood I have illustrated my
invention on the accompanying drawings.
Figure 1 is a section through my instrument shewing it in the first position
while being inserted in the tyre at the point of puncture.
Figure 2 is a similar section to Figure 1 but shewing it in the second position.
Figure 3 is a view of the repairing plug and patch.
Figure 4 is a side view of the instrument.
Figure 5 shews the position of the plug and patch after being repaired.
In carrying my invention into effect my instrument consists of the two or more
steel prongs A having the points A¹ which are mounted to form part of the said
prongs by hinges 2 and so as to form when closed together at the point the
thin sharp steel tube a³ which can readily be pressed through the rubber of the
tyre. A tube B is mounted in the handle 6 so that the end ba of the tube rests
within the points A¹ of the prongs which are opened by pressure on the spring
part of the prongs A. thus bringing the points into the position shewn by Figure 2.
The points are flanged out as shewn at a so as to prevent the instrument being
forced out or either of the tubes slipping off the end during the operation herein-
after described. For preparing the instrument for the repair of a puncture, a
suitable piece of repairing rubber such as D Figure 3 is connected with a length
of thread d after which it is drawn into the mouth of the tube B by the thread
being threaded through the slot 63 a small quantity of solution being also placed
in the slot above the patch. Within the said tube B a sliding rod C is inserted
for the purpose of pushing the patch D from the tube and at the same time presses
the solution on to the patch.
The action of repairing a puncture is as follows. The points a³ of the prongs
are inserted into the puncture and afterwards forced open by pressure on the
prongs in the direction shewn by arrows after which the sliding rod is pressed
down the tube thereby pressing the patch into the inside of the tyre, after which
the instrument is withdrawn and the patch pulled by means of the thread so that
the plug enters the puncture whereupon the inflation of the tyre presses and
retains the patch against the inside of the air tube or case, and the solution on the
repairing patch adhering to the same the pressure of the air continues to retain
it in position. The wings E are provided for use in holding the instrument in
position.
The prongs A may be operated in the required manner by means of a screw
ring which act on threads formed on the outsides of the prongs or a sliding link
may be provided for the same purpose. The tube B may be screwed at 62 and the
collar A tapped so as to enable the mouth of the tube to be screwed forward
through the points A¹ into the tyre.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:
1st. The improvements in the mode of and means for repairing Pneumatic
tyres substantially as herein set forth and illustrated on the accompanying
drawings.
2nd. For repairing pneumatic tyres the instrument substantially as herein set
forth and shewn upon the accompanying drawings.
Dated this 11th day of August 1897
WALTER GRIFFITHS.