Improved Valve for Pneumatic India Rubber Tyres and the like.
Year: 1891

page_text: Date of Application, 29th May, 1891
Complete Specification Left, 4th June, 1891-Accepted, 4th July, 1891
PROVISIONAL SPECIFICATION.
Improved Valve for Pneumatic India Rubber Tyres and the like.
A communication from abroad by HEINRICH KLEYER, of Frankfort-on-the-Main,
in the Empire of Germany, Cycle Wheel Manufacturer.
1, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool & 6, Bank Street, Manchester
both in the County of Lancaster & 323 High Holborn in the County of Middlesex,
Civil Engineer, do hereby declare the nature of this invention to be as follows:-
The valve which it is believed has hitherto been exclusively used for the
admission of compressed air into pneumatic indiarubber tyres is shown in Figure 6
of the accompanying sheet of drawings, and consists
1. Of a soft indiarubber pipe a, over which a soft indiarubber disc bis
hermetically glued by means of an indiarubber solution at c;
2. Of a notched vulcanite cylinder d which fits into the indiarubber tube a,
tightly closing it, and rests between the inner upper end of this pipe and the
indiarubber disc attached thereto;
3. Of the linen band e which is placed over the upper end of the indiarubber
tube and is attached to the same on both sides by means of an indiarubber a
solution;
4. Of the linen cover f
A valve composed in the above manner is however not durable and possesses,
besides; various drawbacks. For instance, the valve, after only a brief usage of
the cycle to which the tyre is attached, becomes leaky, when, owing to insufficient
pressure of air in the indiarubber tyre, the sides of the latter press against the
cylinder a, thus causing the indiarubber pipe to quickly and frequently wear out.
Further, the valve immediately becomes leaky if dust or other similar foreign
matter lodge between the cylinder d and the walls of the tube a, and it is quite
impossible to remove this dust without drawing the valve out of the indiarubber
tyre and taking it to pieces.
Further, the valve, as hitherto employed, very quickly ceases to be tight, when
the connection between the tube a and the indiarubber disc is broken up by
pressure exercised on the tube a during the pumping in of the air.
Finally, a great disadvantage of the valve hitherto employed is that, by careless
overfilling of the pneumatic indiarubber tyre, when there is a considerable excess
of pressure owing to an increase of temperature, as well as in the case of intended
repairs, the necessary removal of the compressed air from the indiarubber tyre can
not be effected through the valve but only by making a hole in the indiarubber
tyre, which must be again carefully repaired.
This invention serves to obviate the above mentioned drawbacks and at the same
time allows of the escape of the superfluous or other air out of the indiarubber.
tyre. This new valve is shown on the annexed sheet of drawings, on which
Figures 1 and 3 are views of the same, Figure 3 representing the valve as shown
in Figure 1 turned about 90° round its longitudinal axis;
Figures 2 and 4 are longitudinal sections of Figures 1 and 3 respectively, and
finally Figure 5 is a plan view of the new valve.
As will be seen from the figures, the whole body of the valve, the tube A. and
the plate B, consists of a single cast piece of soft indiarubber, the lower part of
which is coated with a linen casing C. The pipe A is provided with a hollow
space D, narrowing sharply at the top.

page_text: From the upper boundary line of this hollow space, a flat incision E is made
through the upper closed part of the tube A, by means of a lancet, or similar
sharp instrument.
This part of the tube serves as the actual valve. The upper part G of the
pipe A has a narrow longitudinal form (see Figure 5) corresponding to the course
of the lancet 'blade. This part of 'the tube, in consequence of this, is easily bent
to both sides. The new valve is then attached to the indiarubber tyre in the
usual manner.
The mode of action of the new valve is as follows:-
If air be forced into the hollow space D by means of an air pump, it presses
apart the surfaces E stabbed by the lancet and which lie in the interior of the
pneumatic indiarubber tyre, the slit E opens and the air penetrates into the hollow
chamber of the indiarubber tyre. As soon however as the pressure in the hollow
space D allows, the walls bordering the slit E return again to their former position,
the slit closes, and the surfaces bordering it are so firmly pressed one against the
other by the overpressure reigning in the indiarubber tyre, that any escape of air
from the tyre is entirely prevented.
The tyre may also easily be partially or totally emptied with this new valve by
introducing a fine tube through the hollow space D of the same, pressing this tube
upwards, so as to push to one side the limiting surfaces of the slit E, whereby air
escapes through the opening of the pipe as long as the same remains in connection
with the hollow chamber of the tyre, and overpressure exists in the tyre.
Should the slit E, through the entrance of any foreign matter between its
limiting surfaces, no longer close entirely, such can be easily and completely
cleaned by means of a suitably shaped instrument introduced between the surfaces..
This new valve possesses the following advantages:-
1st. The whole body of the valve is elastic, and the upper part of the tube.A
which forms the actual valve bends so extremely easily to either side that neither
the inner walls of the pneumatic tyre nor the valve itself suffer if, through too
small air pressure in the tyre between the ground and the steel tyre of the cycle,
side pressure or shock is exerted from the latter on the valve.
2nd. Any leakage of the tube A at the point of connection with the disc B
is entirely removed by the latter being made of soft indiarubber in one piece with
the former.
3rd. The compressed air in the tyre may be partially or entirely removed by the
insertion of a small pipe through the valve.
4th. Finally, the cleaning of the valve may be at any time easily and completely
performed by the insertion of a piece of wire.
Dated this 28th day of May 1891.
WM. P. THOMPSON & Co.,
Per John Hayes,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improved Valve for Pneumatic India Rubber Tyres and the like.
A. communication from abroad by HEINRICH KLEYER, of Frankfort-on-the-Main, 4
in the Empire of Germany, Cycle Wheel Manufacturer.
I, WILLIAM PHILLIPS THOMPSON F.C.S. M.I.M.E. of the Agency for i
Foreign Patent Solicitors 6, Lord Street, Liverpool & 6, Bank Street,
Manchester both in the County of Lancaster & 323 High Holborn in the
County of Middlesex, Civil Engineer do hereby declare the nature of this invention 5
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The valve, which, it is believed, has hitherto been exclusively used for the

page_text: admission of compressed air into pneumatic indiarubber tyres, is shown in Figure 6
of the sheet of drawings, filed with the Provisional Specification and consists--
1. Of a soft indiarubber pipe a, over which a soft indiarubber disc b is hermetically
glued by means of an indiarubber solution at c,
2. Of a notched vulcanite cylinder d, which fits into the indiarubber tube a,
tightly closing it, and rests between the inner upper end of this pipe and the india-
rubber disc attached thereto,
3. Of the linen band e which is placed over the upper end of the indiarubber
tube and is attached to the same on both sides by means of an indiarubber
solution,
4. Of the linen cover f.
A valve composed in the above manner is, however, not durable, and possesses,
besides, various drawbacks. For instance, the valve, after only a brief usage of
the cycle to which the tyre is attached, becomes leaky, when, owing to insufficient
pressure of air in the indiarubber tyre, the sides of the latter press against the
cylinder a, thus causing the indiarubber pipe to quickly and frequently wear out.
Further, the valve immediately becomes leaky if dust or other similar foreign
matter lodge between the cylinder d and the walls of the tube a, and it is quite
impossible to remove this dust without drawing the valve out of the indiarubber
tyre and taking it to pieces.
Further, the valve, as hitherto employed, very quickly ceases to be tight, when
the connection between the tube a and the indiarubber disc is broken up by
pressure exercised on the tube a during the pumping in of the air..
Finally, a great disadvantage of the valve hitherto employed is that, by careless
overfilling of the pneumatic indiarubber tyre, when there is a considerable excess
of pressure owing to an increase of temperature, as well as in the case of intended
repairs, the necessary removal of the compressed air from the indiarubber tyre
cannot be effected through the valve, but only by making a hole in the indiarubber
tyre, which must be again carefully repaired.
This invention serves to obviate the above mentioned drawbacks, and, at the same
time, allows of the escape of the superfluous or other air out of the indiarubber
tyre. This new valve is shown on the sheet of drawings filed with the Provisional
Specification, on which :-
Figures 1 and 3 are views of the same, Figure 3 representing the valve as shown
in Figure 1 turned about 90° round its longitudinal axis ;
Figures 2 and 4 are longitudinal sections of Figures 1 and 3 respectively, and
finally,
Figure 5 is a plan view of the new valve.
As will be seen from the figures, the whole body of the valve, the tube A and
the plate B, consists of a single cast piece of soft indiarubber, the lower part of
which is coated with a linen casing C. The pipe A is provided with a hollow
space D, narrowing sharply at the top.
From the upper boundary line of this hollow space, a flat incision E is made
through the upper closed part of the tube A, by means of a lancet or similar sharp
instrument.
This part of the tube serves as the actual valve. The upper part G of the
pipe A has a narrow longitudinal form (see Figure 5) corresponding to the course
of the lancet blade. This part of the tube, in consequence of this, is easily bent to
both sides. The new valve is then attached to the indiarubber tyre in the usual
manner.
The mode of action of the new valve is as follows:-
If air be forced into the hollow space D by means of an air pump, it presses
apart the surfaces E stabbed by the lancet and which lie in the interior of the
pneumatic indiarubber tyre, the slit E opens, and the air penetrates into the hollow
chamber of the indiarubber tyre. As soon, however, as the pressure in the hollow
space D allows, the walls bordering the slit E return again to their former position,
the slit closes, and the surfaces bordering it are so firmly pressed one against the

page_text: other by the overpressure reigning in the indiarubber tyre that any escape of air
from the tyre is entirely prevented.
The tyre may also easily be partially or totally emptied with this new valve by
introducing a fine tube through the hollow space D of the same, pressing this tube
upwards, so as to push to one side the limiting surfaces of the slit E, whereby air
escapes through the opening of the pipe as long as the same remains in connection
with the hollow chamber of the tyre, and overpressure exists in the tyre.
Should the slit E, through the entrance of any foreign matter between its limiting
surfaces, no longer close entirely, such can be easily and completely cleaned by
means of a suitably shaped instrument introduced between the surfaces.
This new valve possesses the following advantages
:-
1st. The whole body of the valve is elastic, and the upper part of the tube A,
which forms the actual valve, bends so extremely easily to either side that neither
the inner walls of the pneumatic tyre nor the valve itself suffer if, through too
small air pressure in the tyre between the ground and the steel tyre of the cycle,
side pressure or shock is exerted from the latter on the valve.
2nd. Any leakage of the tube A at the point of connection with the disc B
is entirely removed by the latter being made of soft indiarubber in one piece with
the former.
3rd. The compressed air in the tyre may be partially or entirely removed by the
insertion of a small pipe through the valve.
4th. Finally, the cleaning of the valve may be at any time easily and completely
performed by the insertion of a piece of wire.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated
to me by my foreign correspondent, I declare that what I claim is :-
A valve whereby compressed air can be introduced into and let out of indiarubber
tyres and the like, and which will not be influenced by a blow, a stroke or pressure
from without, consisting of the tube A with upper part G cast together with the
packing plate B out of soft rubber, which part G projects into the interior of the
tyre, and is pierced through with a fine slit, in such manner that the air pressure ou
the exterior walls closes the slit but the pressure of the compressed air in the
space D, or of a small tube, introduced therein, opens the puncture; all arranged
substantially as hereinbefore described and shown.
Dated this 3rd day of June 1891.
WM. P. THOMPSON & Co.,
Agents for the Applicant.