Improvements in Air-valves for Pneumatic Tyres.
Year: 1895

page_text: Date of Application, 16th July, 1895-Accepted, 17th. Aug.,, 1895
COMPLETE SPECIFICATION:*
Improvements in Air-valves for Pneumatic Tyres.::
I, JULIUS SCHIÖNNING, of Holbergsgade 9, Copenhagen, in the Kingdom of
Denmark, Manufacturer, 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 :-
The air-valves hitherto employed for pneumatic tyres all have.the, defect, that
they are difficult to get at, the end with which the tube of the air-pump is to .be
connected being placed between and in the same direction as the spokes of the
wheel and the valve-seat itself being furthermore so constructed that it is difficult
to clean, which, especially as far as these valves are concerned, is a great
drawback.
According to my said invention the above mentioned inconveniences as well as
several others are obviated, the tube with which the air-pump is to be connected
projecting sideways between and clear of the spokes and the valve-seat and its
leather-packing being at any time easily accessible for inspection.
The invention is illustrated in the accompanying drawing, in which
Figure 1 is a vertical section of the valve in its closed position, and
Figure 2 shows a part of the same during the operation of pumping or
inflating.
Like letters designate like parts in both figures.
a is the head inside the air-tube kept fast between the head and the piece b,
The fluted
which is screwed tightly against the air-tube by means of the nut c.
nute serves to fasten the valve to the felly. The tube d of the valve is screw-
threaded on the outside, but has a smooth surface on the one side to prevent it
from turning in the piece band in the felly. At the other end the tube dis
recessed hollowed out and in which recess or hollow the leather-packing ring 1
rests. Over this end of the tube d is screwed the piece which is bored out
longitudinally, the boring being at the upper end supplied with screw-threads that
fit those of the tube d, the boring, however, tapering somewhat at the lower end.
The narrowing forms part of a ball-surface embracing the ball or cylinder i, bored
through at a right angle, which extends downwards into the similarly bored and
externally screw-threaded tap h that is connected with the air-pump when air is to
be pumped into the tyre and which also serves to hold the dust-cap k, screwed
thereto. Inside the tap h is placed a pin n the lower end of which is conical and
fits into the conically shaped contraction of the boring of the tap h so that it serves
as a reserve-valve during the action of pumping or inflating and prevents the injected
air from returning to the pump.
The main-valve, however, consists of the ball i, which only allows passage
between the channel in the tap h and the main-channel in d, when the tap through
a cutting in the piece f is turned outwards at right angles as shown in Figure 2,
where the piece with the ball i and the tap h are shown while the dust-cap and
part of the piece d with appurtenances are left out.
In this position where the tap h projects sideways between the spokes of the
wheel the pumping may be carried out comfortably. When finished the tap h is
turned down and the surface of the ball i will at once together with the packing-
disc completely close the valve-opening, the tap h being kept in position by the
screwing on of the dust-cap k, which by being screwed securely against another
packing-ring will increase the air-tightness, this being, however, not necessary, as

page_text: the packing-ring 'l as well as the ball i with its tap h may at any time be easily
removed from the piece f for inspection and cleansing by unscrewing from the
tube d, while the force with which the ball i presses against the packing-ring
with appertaining valve-seat may be easily regulated by screwing the, piece f more
or less tightly against d and absolute air-tightness thereby obtained.
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. An air-valve for pneumatic tyres characterized by the closing element being
formed by a ball, bored out at a right angle, placed directly outside the main-
piece (d) of the valve and supplied with a tap (h) that in its turn.is bored out, and
externally screw-threaded, the said ball either opening or closing the valve when
turned around its own centre.
2. In the air-valve for pneumatic tyres characterized in Claim 1 the arrangement,
in which the ball (i) is placed in a loose piece (f) supplied with screw-threads
which fit those of the main-piece (d) so that the valve may be easily cleaned and
its pressure easily regulated."
3. In the air-valve for pneumatic tyres characterized in Claim 1 the arrangement
in which the tap (h) contains a loose reserve-valve which is closed by the pressure
of air in the pneumatic tyre, but is opened by the pressure of air in the pump
'whenever this exceeds the counterpressure of the air in the pneumatic tyre.
Dated this 16th day of July 1895.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.