An Improved Valve.
Year: 1894

page_text: Date of Application, 16th Mar., 1894
Complete Specification Left, 3rd Aug., 1894-Accepted, 8th Sept., 1894
An Improved Valve.
1, CLEMENTS COURTNEY, of 25 Ashbrook Road, Upper Holloway, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to
be as follows :-
This ny invention has reference to an improved valve more especially applicable
for use in combination with pneumatic tyres for cycles and other vehicles; but
which valve may be used in combination with other articles such as air-mattresses,
life-belts, and other articles intended to be inflated with air, gases or liquids.
The object of my invention is to provide a valve which is simple in construction,
neat in appearance, not liable to get out of order, which will efficiently prevent the
return of compressed air, gas or liquid, and which is cheap to manufacture.
A further object of the invention is to construct a valve of that class in which
the valve proper consists of rubber or such-like substance or material, in such
manner that the rubber does not make close contact with the metal or other
substance forming the body of the valve or valve-stem at the part or parts where
the rubber or the like is raised from off the metal by the action of and to
permit the passage of the air or liquid between said rubber and the metal into
the tyre or the like. It is found by experience that when rubber, elastic, or the
like is in close contact with metal and some other substances for a length of
time, the rubber will vulcanize or become sticky in those places where the contact
exists, and it will adhere to the metal or other substance. It is to overcome
this objection in combined rubber and metal valves that this my present invention
hereinafter described is designed.
When constructing a valve in accordance with this my invention, I employ the
ordinary and well-known socket or outer casing for containing the valve proper and
retaining it in the opening made for its reception in the tyre or the like.
The valve proper comprises a stem-hereinafter referred to as the valve-stem-
consisting of a short length of tube externally screw-threaded and formed with a
shoulder and collar or flange a short distance from one end thereof; the shorter
portion beyond the shoulder being plain and not screw-threaded. Upon this plain
portion, a piece of rubber, elastic or other suitable flexible and pliable tube is
sprung or otherwise attached. At the other extremity of this piece of tube is a
preferably metal plug which effectively closes the end thereof. The end of the
tube may however be closed in any other suitable manner, such as by being tied
with string or wire, cemented together, or the tube may be moulded in requisite
lengths with one closed end.
A small pin-hole is made in the side of the tube and permits air, gas or liquid
forced into the tube-by a force-pump or other means applied to the screw-threaded
portion of the valve-stem, to escape into the valve-casing afore-referred to, and
from thence into the tyre or the like. The return of the air, gas or fluid is however
prevented by reason of the closing of the pin-hole by the pressure of the compressed
air upon the outer surface of the flexible tube.
The expansion and elongation of the flexible tube is limited by the internal
dimensions of the casing.
Dated this 16th day of March 1894.

page_text: An Improved Valve.
I, CLEMENTS COURTNEY, of 25 Ashbrook Road, Upper Holloway, London, N.
Engineer, 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 my invention has reference to an improved valve more especially applicable
for use in combination with pneumatic tyres for cycles and other vehicles; but
which valve may be used in combination with other articles, such as air mattresses,
life belts, and all such like articles intended to be inflated with air, gases or
liquids.
The object of my invention is to provide a valve which is simple in construction,
neat in appearance, not liable to get out of order, which will efficiently prevent the
return of compressed air, gas or liquid, and which is cheap to manufacture.
A further object is to construct a valve of that class in which the valve proper
consists of rubber, or such like substance or material, in such manner that the
rubber does not make close contact with the metal forming the body of the valve,
or valve-stem at the part or parts where the rubber or the like is raised from off
the metal by the action of and to permit the passage of the air or liquid between
said rubber and the metal into the tyre or the like. It is found when rubber and
the like is in close contact with metal and some other substances for a length of
time, that the rubber will vulcanize or become sticky in those places where the
contact exists, and will adhere to the metal or the like, and it is to overcome this
objection in combined rubber and metal valves that my hereinafter described valve
is designed.
My invention may be described as follows; reference being had to the accom-
panying drawing, and to the figures and letters of reference marked thereon; like
letters referring to like parts in all the views.
Fig. 1., is an elevation of my improved valve:
Fig. 2., is a diametrical section thereof:
Fig. 3., is a detail view of the valve proper.
The valve comprises a stem A (hereinafter referred to as the valve-stem)
consisting of a short length of tube externally screw threaded and formed with a
flange B a short distance from one end thereof; the shorter portion C beyond the
flange being plain and not screw-threaded. Upon this plain portion, a piece of
rubber, elastic or other suitable flexible and pliable tube D is sprung or otherwise
attached. At the other extremity of this piece of flexible tube is a preferably
metal plug E which effectively closes the end thereof. The end of the tube may
however be closed in any other suitable manner such as by being tied, cemented,
or the tube may be moulded with a closed end when manufactured. A small pin-
hole F is made in the side of the tube and permits air, gas or liquid forced into
the tube (by a force-pump, or other means) applied to the screw threaded portion
of the valve-stem to escape into the ordinary and well known valve-casing G
through the aperture H and from thence into the tyre or the like. The return of
the air is however prevented by reason of the closing of the pin-hole F by the
pressure of the compressed air upon the outer surface of the flexible tube D. The
expansion and elongation of the flexible tube is limited by the internal dimensions
of the casing G and undue strain upon the rubber or the like is prevented by the
plug E coming into contact with the upper edges of the aperture H. Grooves I
in the plug E permit the air to pass into the aperture Ĥ when said plug rests
upon the upper periphery of the aperture.
The valve casing G is provided with the usual head K or any other suitable
device, and a nut to retain said casing in place within the tyre or the like.

page_text: The valve-stem A is fitted with the usual dust-cap M and is retained within the
valve-casing G by the nut N; the flange O of which overlaps the flange Bas
sbewn.
It will be readily understood, that when air is forced through the valve-stem A
it will pass into the flexible tube D and escape through the pin-hole F into the
casing G then through aperture H into the tyre or the like. When however
the pressure from the outside is removed, the pressure of the air within the tyre
compresses the rubber and effectively closes the pin-hole F.
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 :-
-
In a valve of that class herein before described and having a valve-casing adapted
to be secured within a cycle-tyre and other articles intended to be filled with air,
gas, or liquids, and a valve-stem secured to said casing, the rubber or other flexible
tube closed in any suitable way at one end, provided with an incision or the like
through its side, and attached at its open end to the valve stem, all substantially as
and adapted to operate substantially as and for the purposes herein before described,
and illustrated in the drawings hereunto annexed.
Dated this 4th day of June 1894.
C. COURTNEY.