Improvements in or relating to Pneumatic Valves.
Year: 1897

page_text: Date of Application, 5th Jan., 1897-Accepted, 27th Mar.,
1897
COMPLETE SPECIFICATION.
Improvements in or relating to Pneumatic Valves.
I, CHARLES HENRY CLARK, Manufacturer, residing at No. 29 Boardman Avenue,
in the City of Rochester, State of New York, 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:-
This invention relates to pneumatic valves for bicycle tires, and for other purposes.
The object of the invention is to provide a valve, particularly for pneumatic tires,
which simple in construction, and in which the wearing parts are easily removable,
and can be repaired or replaced quickly by any one at very slight cost. In fact, as
will be presently explained, the only part of the valve likely to wear out is composed
of a short length of common rubber tubing, which can be replaced in a few moments,
without the aid of an expert. In the accompanying drawing,
Fig. 1 is a side view of the valve-casing and cap;
Fig. 2 is a sectional view showing the valve closed;
Fig. 3 is a sectional view showing the cap reversed and the valve open, and
Fig. 4 is a sectional view showing the parts separated.
In the drawing, A indicates the casing of the valve, which is tubular and adapted
for attachment to the tire in the ordinary way. The upper part of the casing is
threaded internally at a and there is a threaded tubular plug or support B which
screws inside the casing A, and has a projection on its inner end upon which there
is a short piece of rubber tube C, open at both ends. In the top of the plug is a
slot 6' in which may be fitted a screw-driver d on the screw-cap D. With this screw-
driver the plug can be inserted or removed at any time. The screw-cap is provided
with a soft rubber packing disk F, and a thin metal diskf which is free to rotate.
At the inner end of the rubber tube is a conical valve E for expanded the end of
the tube and compressing it against the wall of the casing to cut off the escape of air.
The smaller end of the cone rests within the inner end of the rubber tube, and a stem e
upon the valve extends up through the plug B, and has its top flattened and expanded,
forming a small head e' which prevents the valve from being lost when the plug
is removed. The valve E has free play up and down to a limited extent, but the valve
and the tube C are connected to the plug and are removable with it. The opening or
bore of the casing is preferably of two or three different sizes. It is largest at the
upper end, in which the plug and rubber tube fit. Below the tube the opening is
narrower, being but slightly larger than the valve E, and forming a guide for said
valve. Below the valve the opening may be still smaller, if desired.
.
To inflate the tire, the cap D is removed, the pump nozzle applied either to the
inner or outer thread of the casing, and the air is forced in, passing through the
plug B and the tube C and around the conical valve E into the tire. When the pump
is stopped the outflowing air strikes the head of the conical valve and instantly forces
it into the tube, thereby closing the tube and expanding the end of it laterally against
the casing to prevent air from passing around it. When the tire is inflated the air
may be prevented from escaping entirely by the check-valve E, but the screw-cap D
should be screwed on the outer end of the casing to keep out dust and to assist in
holding the air from escaping. Figures 1 and 2 show the screw-cap so attached.
Figure 3 shows it inverted and the screw-driver inserted in the slot of the plug for

page_text: the purpose of withdrawing the same. Should the valve stick in the tube it may be
loosened by pushing down the stem e with the screw-driver d.
Should the valve fail to operate properly, it may be removed and inspected with
very little trouble, as all of the working parts are connected with the screw-plug B. If
the rubber tube C be worn, it can be removed and replaced without difficulty by
anyone, and without taking the valve to a repair shop.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A pneumatic valve comprising a casing, such as A, a plug, such as B, a rubber
tube on the plug, and a conical valve operating in the rubber tube.
2. A pneumatic valve comprising a casing, such as A, a plug, such as B, screwed
into the casing, an extension on the plug, a rubber tube on the extension, and a
conical valve having a stem passing up through the tube and plug and provided with
a head.
3. A pneumatic valve, comprising a casing A, a cap D, and a removable plug to
which the valve E and tube Care connected.
Dated this 4th day of January 1897.
BOULT & WADE,
Agents for the Applicant.