Improvements in or relating to Air Valve and Air Outlet Caps for Pneumatic Tyres, Pneumatic Shields, Cushions, and other like Articles supplied with Fluid under Compression.
Year: 1897

page_text: Date of Application, 6th Oct., 1897
Complete Specification Left, 6th July, 1898-Accepted, 1st Oct., 1898
Improvements in or relating to Air Valve and Air Outlet Caps for
Pneumatic Tyres, Pneumatic Shields, Cushions, and other like
Articles supplied with Fluid under Compression.
I, ALEXANDER COLE, of 58, Booterstown Avenue, in the County of Dublin,
Ireland, Commercial Traveller, do hereby declare the nature of this invention
to be as follows;
-
In many pneumatic devices the air-tightness depends entirely on the cap. In
others there is a valve but a cap is used as an additional security, and to prevent
dirt from entering the tube to the valve.
Now my invention is designed to be used in both these cases. When applied
to a valved orifice such as those ordinarily used on pneumatic bicycle tyres I
place a ring below the screwed cap which fits on the body of the valve and
keeps the valve in position. This ring is preferably formed something like an
enormous eyelet with an india rubber disc in the centre formed with a central
hole. By this means the disc can suit any size of valve. This disc ring is
linked to a second ring sliding in a recess in the cap consequently the cap can
be screwed on and off the tube or orifice but will always remain in the ring
and this ring being attached by a stirrup or links to the lower ring the cap
always remains attached to the valve device, and thus cannot get lost and no
chain is required. The cap has usually, especially when there is no valve, a
leather or rubber washer or disc fitting against the tube. Now in screwing the
valve down this washer screws round on the lip of the tube and is very quickly
worn out. Now part of my invention consists in placing this leather washer in
a little turned cup within the turned head of the cap. The cap consequently
freely turns on the cup and the washer is held stationary on the lip of the tube
by friction consequently there is no wear on the washer. At the same time as
the washer naturally expands outward on being pressed (the cap being enlarged
internally to allow said expansion) it is held sufficiently tightly in the cap to
prevent its falling out.
COMPLETE SPECIFICATION.
Improvements in or relating to Air Valve and Air Outlet Caps for
Pneumatic Tyres, Pneumatic Shields, Cushions, and other like
Articles supplied with Fluid under Compression.
I, ALEXANDER COLE, of 58, Booterstown Avenue, in the County of Dublin,
Ireland, Commercial Traveller, do hereby declare the nature of this invention

page_text: and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:—
In many pneumatic tyres, pneumatic shields, cushions and other like articles
supplied with fluid under compression the air-tightness depends entirely on the
cap, in others there is a valve, but a cap is used as an additional security, and to
prevent dirt from entering the tube to the valve.
Now my invention is designed to be used in both cases. It is best described
by aid of the accompanying drawings, in which,
i
Fig. 1 is a general view of a bicycle valve with my cap attached, the cap
being unscrewed and turned to one side.
Fig. 2 similar view taken at right angles to the first and with the cap in
position.
Fig. 3 a perspective view of the cap and its attachment and, Fig. 4 enlarged
view of attachment showing the india-rubber disc adapting it for very widely
varying sizes of valve bodies.
cap
ין
In these A is a ring shown in detail in Fig. 4 placed below the screwed
which fits on the body of the valve and keeps the valve tube or stem G in position.
This ring is preferably formed something like an enormous eyelet with an india-
rubber disc B in the centre formed with a central hole. By this means the disc
can suit several different sizes of valves. This disc ring is linked by links C
to a second ring D sliding in a recess on the cap E, consequently the cap E
can be screwed on and off the tube or orifice G, but will always remain in the
ring D and this ring being attached by the swivelling stirrup C or links to the
lower ring A. the cap E always remains attached to the valve device and thus
cannot get lost, and no chain is required.
Having now particularly described and ascertained the nature of my inven-
tion, and in what manner the same is to be performed, I declare that what
I claim is:-
1. The combination with a pneumatic-cushion valve device of a dust cap capable
of being freely screwed on to the end of the nozzle and a stirrup or pair of links
uniting it by means of a swivel or its equivalent with an attachment below the
valve cap For its equivalent whereby while the dust cap E can be freely screwed
on and off or thrown to one side it is held firmly to the valve device and thus
cannot get lost.
2. The eyelet disc substantially as and for the purposes described.
3. The combination with a valve device of an abutment fixed on the valve
below the valve cap F a stirrup or links swivelling on this abutment and fixed
to the cap E but sliding loosely thereon and a cap fitting the nozzle whereby
the cap is held permanently to the valve device while being free to be screwed
off and on substantially as described.
Dated this fith day of T.L. 1000
WM. P. THOMPSON & Co.,
Patent Agents, of Liverpool, Manchester, Birmingham, and London.