Improvements in Air Valves suitable for Pneumatic Tyres.
Year: 1893

page_text: Date of Application, 11th Jan., 1893
Complete Specification Left, 1st Aug., 1893—Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Air Valves suitable for Pneumatic Tyres.
1, EDWIN BOWLES, of Queen's Road, Beeston, in the County of Nottingham,
Cycle Works Foreman, do hereby declare the nature of this invention to be as
follows:-
This invention relates to air valves and is particularly designed with a view to
use in pneumatic tyres for cycles and the like.
In carrying the invention into effect I employ a main piece which for distinction
I will call the body; this piece is recessed from its inner end, the bottom of the
recess forming the seat for the valve. the smaller hole or continuation passing
through the rest of the body. At its inner end the body may be formed into a
head, which may fit against the inside of the air tube, while a washer may be
pressed up against the outside of the air tube, thus forming an air tight joint.
Beyond this the body may be continued in a cylindrical form with a screw thread
upon it to receive a nut to secure it to the wheel rim; also to receive the pump
nozzle when inflated or a cap in ordinary circumstances.
The valve I prefer to make of a metallic rod of smaller diameter than the
smaller hole in the body long enough to pass through the body and screwed at the
end to receive a cap or nut by which the valve may be drawn up tight on to its
seating after the tyre has been inflated; both pump nozzle and covering cap may
be screwed over this nut. The outer end of the body where the pump nozzle
screws on may be cut or bored or equivalent means may be devised for the passage
of the air from the pump to the inside of the body.
At its inner end the body may be screwed internally to receive a cap having
holes or equivalent through which the air can pass from the interior of the body
to the interior of the air tube. This cap is preferably provided with a square or
equivalent central hole to fit on to the end of the valve spindle which inay be
extended beyond the valve so that when the cap is screwed up or otherwise fixed
it will keep the valve froin turning while the nut upon the outer end of the valve
spindle is screwed up to draw the valve firmly on to its seat.
Instead of screwing
on the inner cap it may be put on with a bezel like a watch glass or otherwise
secure and the same remark would apply to the other caps; or the valve spindle
may be formed with a square neck below the valve and the valve body may be
forined with a square hole to receive the square neck on the spindle to keep the
valve from turning while the nut upon the outer end of the valve spindle is screwed
up, thus dispensing with the screwed cap at the inner end of the valve body. The
valve itself I prefer to form of rubber or it may be made of a metal centre rubber
covered, or it may be metal altogether, and may fit against a metal rubber or
equivalent seating. In practice I find that a rubber valve fitting against a metal
seating gives satisfactory results.
If desired a spring may be placed in the inner recess of the body between the
valve and the inner cap for the purpose of normally retaining the valve upon its
seat; this spring may be used either with or without the nut upon the outer end
of the valve spindle.
Dated this 11th day of January 1893.
W. P. THOMPSON & BUULT,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Air Valves suitable for Pneumatic Tyres.
I, EDWIN BOWLES, of Queen's Road, Beeston, in the County of Nottingham,
Cycle Works Foreman, 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 which relates to air valves and is particularly designed with a view
to use in pneumatic tyres for cycles and the like, will be best understood by
reference to the accompanying drawings, in which
Figure is a longitudinal section of the complete fitting with the valve closed.
Figure 2 is a similar view, but with the cap removed and the valve open.
Figure 3 is a perspective view of the valve body and nut and
Figure 4 shows the inner cap, the valve spindle, and its nut.
Figure 5 is a perspective view showing a portion of the wheel rin, air-tube and
the valve.
Like letters represent like parts throughout the drawings.
A is the cylindrical valve-body preferably reduced at its outer end A' and
screwed externally to receive the cap B which fitting up against the leather
washer C, closes the external portion of the fitting securely in. The body A is
recessed at its inner end at D so as to leave a valve-seat E while it is further
recessed to a smaller diameter at F, the outer end of the recess F being preferably
countersunk to receive the conical or rounded end of the nut G which screws upon
the screwed end of the valve spindle or stem H. I is the valve preferably
having a rubber washer or facing suitably faced to fit the valve-seat E;
however the valve may be made entirely of metal and the seat of metal or either
the valve or seat may be partly or entirely formed of rubber or other equivalent
material.
Beyond the valve I the stem H is continued at H2 and squared, flattened, or
otherwise arranged, so that when fitting into the plug ) which screws into the
large recess in the inner end of the body A it will of necessity turn with or be
held by the said plug J. J is perforated with an opening J passing entirely
through it, and this opening may be provided with side channels or the like, to
allow of the free passage of the air, which is forced in past the valve I; or
separate holes may be provided through the plug J to allow of the passage of the
air. In Figure 4 the channels Je are provided for this purpose.
The plug J is provided with a flange or head J between which and the flange or
head A of the body A the air tube K may be gripped as shown in Figure 5, the
plug J being screwed up tight for this purpose; both the face of J³ nearest to the
body A, and the face of the collar A² facing J, may be provided with rings or
grooves J to facilitate the making of a tight joint with the air-tube K. L is the
solid or hollow rim of the wheel shown hollow in Figure 5. M is a nut screwing
upon the outside of the cylindrical body A for the purpose of securing the fitting
upon the rim of the wheel as indicated in Figure 5. The object of the plug J
and collar Js is to prevent the turning of the valve spindle H and H while the
nut G is screwed on or off; and also to secure the body A in an air-tight manner
upon the air-tube K.
Cuts O or equivalent means may be employed to allow of the passage of the air
from the pump into the interior of the body A and so through the valve into the
air-tube K; the pump fitting would screw upon the outer screwed portion A¹ of
the valve body A in place of the cap
which would be removed for the purpose.
In use the valve body would be secured to the air-tube K by screwing up the
plug J and gripping the tube between the head J and the collar A², the valve I
being inserted in its place in the body before the plug J was screwed up. The
body being attached to the air-tube K would be passed through an opening provided

page_text: for the purpose in the wheel rim L and secured therein by the nut M. Usually
the hole through the rim L would be squared or flattened at one side so as to
prevent the body from turning while the nut M is screwed up. In Figures 3 and 5
of the drawings a flat A' is shown upon the exterior of the body A for this
purpose.
To inflate the tube the cap B would be unscrewed and the nut G slackened or if
desired entirely removed so as to allow of the valve I moving freely off its seat;
the pump fitting would be screwed on to the cylindrical portion A¹ of the body A
and the pumping operation performed in the usual manner the valve I fitting firmly
in the seating by reason of the pressure exerted upon it by the compressed air
contained within the tube K but after the filling operation is completed the nut G
may be screwed tight up so as to ensure a perfectly air tight union between the
valve and its seat and also to prevent it from being accidentally noved from its
seat.
After the air-tube is charged the pump would be unscrewed the nut G screwed
up tight and the cap B screwed over all thus making it secure and protecting the
internal parts from injury.
The cap B may
spokes of the wheel.
Instead of the screwed valve stem and nut the valve stein may be provided
with a head in lieu of the nut integral with the stem, the stem itself screwing into
the valve.
be secured by a chain passing around the neck B' to one of the
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. In an air valve fitting the combination with a cylindrical body such as A
having a head or flange A and a nut M screwing upon the cylindrical portion for
the purpose of securing the fitting to the rim of the wheel of a hollow plug such
as screwing into the inner end of the body A and provided with a head or
flange such as substantially as described and illustrated in the accompanying
drawings.
2. In an air valve fitting a valve such as 11 having its stem projecting on both
sides one portion being round and screwed to receive a nut and the other squared
flattened or similarly shaped so as to prevent it from turning substantially as
described and illustrated in the accompanying drawings.
3. In an air valve fitting having a cylindrical body such as A the combination
with a valve such as I and stem such as H H1 H2 of an independent plug or piece
such as J adapted to fit over the valve stem H for the purpose of preventing the
valve from turning when the nut is screwed on or off the other end of the spindle
substantially as described and illustrated in the accompanying drawings.
4. In au air valve fitting a cylindrical valve body such as A externally screwed
having a head or flange A2 at one end and a reduced portion at its outer end
also screwed externally a longitudinal perforation F and an internally screwed
enlargement such as D substantially as described and illustrated in the accompanying
drawings.
5. In an air valve fitting the double purpose plug J adapted to secure the valve
fitting to the air tube and also to prevent the turning of the valve substantially as
described and illustrated in the accompanying drawings.
6. The combination and arrangement or parts constituting the complete air valve
fitting substantially as described and illustrated in the accompanying drawings.
Dated this 13th day of Lul 1893
EDWIN BOWLES.
W. P. Thompson & Boult,
Agents for the Applicant.