Year: 1897

page_text: Date of Application (in United Kingdom), 24th June, 1897
Complete Specification Left, 24th June, 1897-Accepted, 31st July, 1897
I, HIRAM NATHANIEL RHODES, of Duluth, in the County of St. Louis,
State of Minnesota, United States of America, 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:-
My invention relates to valves for pneumatic tyres as I shall describe referring to
the accompanying drawings, in which like characters refer to like parts.
Fig. 1 is a side elevation, with parts broken away, of a tyre provided' with a valve
according to this invention.
Fig. 2 shews the same parts with the nipple and valve in vertical section.
Fig. 3 is a view like Fig. 2, illustrating the manner in which the air pump is applied
for charging, and showing the valve opened by the pressure.
Fig. 4 is a side elevation of a single tube tyre provided with the valve.
Fig. 5 is a view like Fig. 4, but with parts broken away, and with nipple and valve
shown in vertical section.
Referring first to Figs. 1, 2 and 3, 1 indicates the outside tube or cover and 2
the inside tube of an ordinary double tube pneumatic tyre. The outer tube 1 has the
ordinary nipple seat 3 and'n slotted mouth or opening 4 closed by the lacing 5. The
nipple aa² is of usual construction, being formed of soft rubber, while the bushing a
is preferably of metal and is cemented within the nipple stem a. The disc-like base a²
is placed within the cover 1 and is fixed to the interior tube 2, by cement as
indicated at 2..
The portion of the inner tube 2, which underlies the body of the nipple a and the
central portion of the disc-like base a², is left loose to form a diaphragm 6 which has
through it a single perforation 7 at one side of the axis of the nipple.
bb indicates the T-shaped valve consisting of a head and stem which works.
in the bore of the bushing a¹, whilst the head 6 is covered by the diaphragın 6 and
seats against the inner face of the nipple base. The valve stem b is of less diameter
than the bore of the bushing a', so as to permit the free passage of air. Preferably,
the working face of the valve head 6' is made with a raised annular flange 62, which
becomes imbedded in the rubber face of the nipple a², thus insuring an air-tight joint
when the valve is seated. When the valve is in working position, the hole 7 of the
diaphragm 6. is at the outer edge or rim of the valve head.
When the tyre is charged, the valve bb¹ is preferably clamped in its closed position,
by means of a cap screw c, the head of which bears against the outer end of the

page_text: bushing a, or against an interposed, washer c', and the stem of which is screwed into
the end of the valve stem b.
In Figs. 3, 8, 9 and 10 indicate, respectively, the, cylinder, the piston rod and the
flexible discharge pipe, of an ordinary pump, the pipe having a screw threaded
nozzle 11, engaging with the nipple bushing a¹, in the usual way.
When the clamping cap or screw c is removed and the pump is applied to the
nipple, as illustrated in Fig. 3, the valve acts as follows. By the pressure of air
discharged from the pump, the valve bbl is forced iuwards; the elastic diaphragın 6
yielding to permit the movement of the valve and to open the hole or air passage 7,
permitting the air to pass into the interior of the tube 2.
During the suction or stroke of the pump, the air pressure within the tube 2, acting
upon the diaphragm 6 forces the valve into its closed position, when it forms a
completely air tight joint.
In securing the valved nipple to a single tube tyre, as illustrated in Figs. 4 and 5,
the tube 12 is cut away to form an opening of somewhat larger diameter than the
valve head b¹. Over this opening and extending over a considerable portion of the
surrounding surface of the tube 12, I securely cement a thin, flexible diaphragm 14,
preferably of rubber.
The base
of the nipple is then cemented' to the outer surface of the diaphragm 14
which has a small hole or air passage 7 in proximity to the edge of the valve
head ¹.
The action of this valve arrangement is substantially the same as that; above
described; with reference to Figs. 1, 2 and 3.
The portion of the tube which I have termed the " diaphragm." may obviously. be
an independent piece, or it may be a portion of one of the tubes of which a tyre is
constructed, and thus the improved valve may be readily applied either to a single or
to a double tube:tyre..
From the drawing and the description it will be seen that the tyre valve is of
simple and cheap construction ensuring an air-tight joint. The efficiency of this valve,
is proved by actual use which shews that there is no leakage, and that the
charging is comparatively easy and rapid, as compared with valve now generally used
and there are no parts liable to displacement or loss.
Having now particularly described' and ascertained the nature of this Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1
1. The combination with a tyre nipple, of a valve having its head seated against
the inner face of the nipple, and covered by a diaphragm which yields 'to the
opening inoveinent of the valve, allowing air to pass through a hole of the diaphragm,
substantially as described.
"
2. The combination with the tyre nipple of the valve having its head seated
against the inner face of the nipple, the cap-screw c screwing into the stem of the
valve and the diaphragm covering the valve head and yielding to the opening
movement of said valve, for air to pass through a hole, substantially as described.
.3. The combination with the tyre nipple a a² formed of soft rubber, of the valve bi
having its head b¹ seated against the inner face of the nipple and provided with the
annular flange 62, substantially as and for the purpose set forth.
Dated this 24th day of June 1897.