Improvements in Air Valves for the Pneumatic Tyres of Bicycles and other Inflated Articles.
Year: 1896

page_text: Date of Application, 23rd June, 1896
Complete Specification Left, 23rd Mar.. 1897-Accepted, 22nd May, 1897
PROVISIONAL SPECIFICATION.
Improvements in Air Valves for the Pneumatic Tyres of Bicycles
and other Inflated Articles.
We, WILLIAM COTTRELL, of 143, Southampton Street, Camberwell, in the
County of Surrey, Engineer, and JAMES DIXON, of 57, Stile Hall Gardens,
Gunnersbury, in the County of Middlesex, Engineer, do hereby declare the nature
of this invention to be as follows:-
Our invention relates to the air valves used for the purpose of inflating the
pneumatic tyres of the wheels of cycles and other vehicles, footballs, and the like,
and it has for its object a novel method of construction by which such air valve is
more durable than has heretofore ordinarily been the case, whilst it is equally
effective, easily made, fitted, and used, and not liable to get out of order.
In order to put our invention in operation we use a tube or case fitted and fixed
into the tyre or other article to be inflated, in the usual way, but open at its outer
end upon which is screwed a cap which holds in position the inner valve or inlet
pipe itself, the outer end of which projects through the cap and is screwed to receive
the force pump by which air is forced in.
The inlet pipe is made taper outside, its inner end being the smaller, and upon it
we stretch and fit a piece of suitable tube of pure indiarubber which is fixed to the
taper pipe upon which it is fitted, by means of indiarubber solution or other suitable
cement or means. The outer taper part of the indiarubber-covered inlet pipe fits
into the outer end of the outer case, which has a corresponding taper, and against
which it is forced by the hollow nut described, making an airtight joint.
Upon the smaller end of this taper and india-rubber-covered air inlet pipe we fit
freely a cap of metal or other suitable material, the inside of which is made taper
to fit for a sufficient distance down more or less accurately the indiarubber
covering of the inlet tube described. The outer end of the cap when the device is
in its place is at a short distance from the inner end of the opening which receives
it, in the tube or case which is fixed in the tyre, this opening being too small to
allow the cap to pass into it, so that it acts as a stop when the valve is raised, a
sufficient number of small notches being made round its edge to allow the air to
be delivered through it into the tyre, even when the cap is in contact with it.
The outside of the cap fits in the outer case or tube sufficiently freely to allow
the air forced in to pass between them when the cap is raised from its seat.
is
The action of the device described is as follows:-The force pump being attached
to the screwed end of the taper india-rubber-covered valve seat, which projects as
described through the hollow nut by which it is held in position, the pump
worked and the air forced in raises the cap from the india-rubber-covered inlet pipe
upon which it fits, and passes into the tyre. When the piston of the pump is
withdrawn for a fresh stroke the cap is returned to its india rubber seat by the
pressure of the air in the tyre, and the greater the pressure the more tightly the cap
is held down.
In order to deflate the tyre, the outer hollow nut by which the indiarubber-
covered inlet tube is held in position is unscrewed, which allows the air to escape
through the valve case.
The different parts of the apparatus may be made of brass or other suitable
metal, or material, and we do not confine ourselves to the precise details and

page_text: proportions of the parts which may be varied more or less to suit varying
circumstances.
Our improved air valve is applicable to the inflation of pneumatic tyres of
bicycles or other cycles or vehicles, to footballs, and other purposes of the like
kind.
Dated this 23rd day of June 1896
EDWARDS. &, Co.,
65 and 66, Chancery Lane, London, Agents for the Applicants.
Improvements in Air Valves for the Pneumatic Tyres of Bicycles
and other Inflated Articles.
We, WILLIAM COTTRELL, of 143, Southampton Street, Camberwell, in the
County of Surrey, Engineer. and JAMES DIXON, of 57, Stile. Hall Gardens,
Gunnersbury, in the County of Middlesex, 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, and accompanying
drawing, that is to say :-
Our invention relates to the air valves used for the purpose of inflating the
pneumatic tyres of the wheels of cycles and other vehicles, footballs, and the like,
and it has for its object a novel method of construction by which such air valve is
more durable than has heretofore ordinarily been the case, whilst it is equally
effective, easily made, fitted, and used, and not liable to get out of order.
The accompanying drawing is in illustration of an air valve constructed according
to our invention, Figure 1 being a side view, Figure 2 a section, Figures 3 and 4
the inner pipe and cap, and the remaining figures separate detailed views of the
several parts.
In order to put our invention in operation we use a tube or case a fitted and fixed
at b into the tyre or other article to be inflated, in the usual way, by a plate and
nuts and z, but open at its outer end upon which is screwed a cap c which holds
in position the inner valve or inlet pipe itself d, the outer end of which d¹ projects
through the cap and is screwed to receive the force pump by which air is forced in,
and also a cap e, when the pump is not in use.
The inlet pipe d is made taper outside, its inner end being the smaller, and upon
it we stretch and fit a piece of suitable tube f of indiarubber which is fixed to the
taper pipe d upon which it is fitted, by means of indiarubber solution or other
suitable cement or means. The outer part of the indiarubber-covered inlet pipe d
fits into the outer end of the outer case a, which may have a corresponding taper
or may be parallel, and against which it is forced by the hollow nut c described, an
air-tight joint being made by the collar g and indiarubber washer h.
The part below the collar g is shown square, a recess in the top of a being also
slightly squared, as shown in Figure 10, to prevent the pipe d from turning round.
Upon the smaller end of this taper and indiarubber-covered air inlet pipe d we
fit freely a cap i of metal or other suitable material, the inside of which is made
taper to fit for a sufficient distance down more or less accurately the indiarubber
covering of the inlet tube d described. The outer end of the cap i when the
device is in its place is at a short distance from the inner end of the opening which
receives it, in the tube or case a which is fixed in the tyre, this opening being too
small at k to allow the cap to pass into it, so that it acts as a stop when the valve
is raised from its indiarubber seat, a sufficient number of small notches being made
round its edge to allow the air to be delivered through it into the tyre, even when

page_text: the cap is in contact with it. Or, the end of the cap i is made conical as shown,:
the sides of the cone being flattened to allow the air to pass.
The outside of the cap i fits in the outer case or tube a sufficiently freely to:
allow the air forced in to pass between them when the cap is raised from its seat.
The action of the device described is as follows:-The force pump being attached!
to the screwed end ate of the taper india rubber-covered valve seat d, which projects.
as described through the hollow nut c by which it is held in position, the pum) is
worked, and the air forced in raises the cap i from the taper indiarubber-cov red
inlet pipe upon which it fits, and passes into the tyre. When the piston of the
pump is withdrawn for a fresh stroke the capi is returned to its indiarubber seat
by the pressure of the air in the tyre, and the greater the pressure the more tightly-
the cap is held down.
In order to deflate the tyre, the outer hollow nut c by which the indiarubber-.
covered inlet tube d is held in position is unscrewed, which allows the air to escape
through the valve case a.
The different parts of the apparatus may be made of brass or other suitable.
metal or material, and we do not confine ourselves to the precise details and
proportions of the parts which may be varied more or less to suit varying.
circumstances.
Our improved air valve is applicable to the inflation of pneumatic tyres of
bicycles or other cycles or vehicles, to footballs, and other purposes of the like.
kind.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:-
1. In air valves for the pneumatic tyres of bicycles and other inflated articles,
the inlet air pipe d taper outside, and provided with an external covering of india--
rubber attached to it, and the valve itself consisting of a cap i closed at its outer
end, and tapered internally to fit closely upon the indiarubber covering f of the
tapered inlet pipe d, substantially as described and shown.
2. The combination with the tapered indiarubber-covered inlet pipe d and valvei
described and claimed in Claim 1, of the outer case a attached to the pneumatic
tube or other article to be inflated, and provided with means for connecting it to an.
inflating pump, substantially as described and illustrated.
Dated this 23rd day of March 1897.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicants.