Improvements in or relating to Valves for Pneumatic Tyres.
Year: 1898

page_text: Date of Application, 18th Nov., 1898
Complete Specification Left, 17th Aug., 1899-Accepted, 18th Nov.,
1899
PROVISIONAL SPECIFICATION.
Improvements in or relating to Valves for Pneumatic Tyres.
We, THOMAS SLOPER, of 14 and 15, Brittox, Devizes, in the County of Wilts,
and CHRISTIAN HAMILTON GRAY, of The Indiarubber, Guttapercha and Telegraphi
Works Co., Ltd., of Silvertown, in the County of Essex, Indiarubber Manu-
facturer, do hereby declare the nature of this invention to be as follows:-
This invention relates to air valves for pneumatic tyres, and may be carried out
in the following manner.
The valve body comprises a head adapted to be placed inside the air tube, the
body being screwed on the outside for the reception of the usual nuts by which
it is secured to the rim of the wheel. The body is hollow and internally
screw-threaded with preferably a very fine thread into which screws the valve
plug which consists of a hollow rod or equivalent screw threaded with a fine
thread externally to fit inside the valve body, and having a cup or recess at
its inner end adapted to engage with a leather or other scat inside the valve body
and preferably close against the head thereof. At a suitable distance from its
inner end the valve plug is bored across into its interior recessed peripherally
and provided with a rubber or equivalent ring or band which foms the operating
valve. At its outer end the valve plug may be screwed to receive a cap and is
preferably provided with one or more milled edges or surfaces by which it may be
turned. The valve body is preferably recessed externally for its outer end to
receive a clip which carries a spring attachment of the cap. The inner end
of the valve body is preferably allowed to project so as to form a double seating
for the leather, rubber or other material, the head being perforated at this part
to allow of the passage of the air into the air tube.
In operation the valve plug is slightly unscrewed and the pump attached to
its screwed outer end when the air is forced through the valve plug past the
rubber band which surrounds it and past the seat at the inner end of the plug
into the air tube. The valve plug is then screwed up so that its inner end
engages with the seat and thus hermetically closes the passage.
The fine thread prevents the escape of any serious quantity of air during the
process of inflation, but packing may be used in addition to or instead of this
thread if desired.
We provide a resilient or ductile plate or bridge which may be secured between
the air tube and the nut or washer upon the valve body so as to engage with the
rim of the wheel when the valve is screw up. By this arrangement we are
enabled to secure a more perfect fit than is possible with the rigid bridges at
present employed; and the same valve may be employed with different kinds,
shapes, and sizes of wheel rims. The plate may be stamped or otherwise formed,
and may be thickened at the centre if desired whether by folding over a portion
of the same piece of metal or another piece of metal or by forming that portion of
the metal thicker than the rest.
Dated this 18th day of November 1898.
BOULT & WADE,
Agents for the Applicant.

page_text: Improvements in or relating to Valves for Pneumatic Tyres.
We, THOMAS SLOPER, of 14 and 15, Brittox, Devizes, in the County of Wilts,
and CHRISTIAN HAMILTON GRAY, of The Indiarubber, Guttapercha and Telegraph
Works Co., Ltd., of Silvertown, in the County of Essex, Indiarubber Manu-
facturer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to le particularly described and ascertained in and
by the following statement:-
This invention relates to air valves for pneumatic tyres.
In carrying out the invention the valve body is recessed externally at or
near its onter end to receive a clip which carries a spring attachment of the
dust cap.
A resilient or ductile plate or bridge is also provided which is secured between
the air tube and the nut upon the valve body so as to engage with the rim of
the wheel when the valve body is screwed up. By this arrangement a more
perfect fit is secured than is possible with the rigid bridges at present employed
and the same valve may be employed with different kinds shapes and sizes of
wheel rims. The plate may be stamped or otherwise formed and may be
thickened at the centre if desired, either by folding over a portion of the same
piece of metal or another piece of metal or by forming that portion of the metal
thicker than the rest.
In the accompanying drawings:
Figure 1 is an elevation of a valve attached to the rim (in section) of a cycle
wheel.
Figure 2 is a perspective view showing the plate or washer in position the
air tube being omitted and the outer tube cut away.
Figures 3, 4, 5 and 6 are views of the plate or washer detached.
Like letters indicate like parts in all the figures.
A is the body of the valve screw threaded in the usual manner for fixing in
the wheel rim. It is provided with a cap B having a spring attachment and
spring clip B, and on the body of the valve is formed an annular groove or
recess A to receive the spring clip. The groove A¹ enables the clip to turn
readily in any direction on the body of the valve whilst retaining a firm grip
of the same.
The valve is formed in a usual mauner with a flat head A forming a bearing
surface to engage the air-tube E, and C is a plate or washer interposed between
the tightening nut A3 and the said air-tube.
The plate C is formed with a central rectangular portion, in which is the hole C¹
for the valve body, and tapering ends placed at an angle to the central portion.
The plate is formed of any ductile or resilient material and preferably the central
portion is formed thicker than the tapered ends. This may be done by bending
over a fold of the material from which the plate is stamped, as shown in Figure 5
or by a double fold of a separate piece of material as shown in Figure 6.
The valve is attached to the rim of the wheel in the usual well known manner,
being held fast by a nut F which bears against the outer surface of the rim, and
draws the plate C against the inuer surface of the rim or of the outer tube, to
which the plate readily adapts itself as shown in Figure 2 owing to its con-
struction and resilient or ductile quality.
With the short rigid plates usually employed a space is left at the ends of the
plate forming an opening, through which the air tube is liable to be blown when
inflated,, and with a wide rim there is sometimes a space at each side of the plate,

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
-
1. In an inflation valve for a pneumatic tyre the combination with a dust cap B
a spring support connected therewith and a spring clip such as B¹ of an annular
groove such as A¹ substantially as and for the purpose described and illustrated
in Figure 1 of the accompanying drawings.
2. The combination with a valve for a pneumatic tyre of a resilient or ductile
plate such as C substantially as and for the purpose described and illustrated in
the accompanying drawings.
Dated this 29th day of July 1899.
THOMAS SLOPER.
C. H. GRAY.
Boult & Wade,
Agents for the Applicants.