Improvements in Inflation Valves for Pneumatic Tires and other Air Chambers.
Year: 1898

page_text: Date of Application, 9th Apr., 1898
Complete Specification Left, 30th Dec., 1898-Accepted, 11th Feb.,
1899
PROVISIONAL SPECIFICATION.
'
Improvements in Inflation Valves for Pneumatic Tires and other Air
Chambers.
I, ROBERT REID, of 106, A'Beckett Street, Melbourne, in the Colony of Victoria,
Engineer, do hereby declare the nature of this invention to be as follows;-
My invention relates to valves such as are used upon the tires of bicycles and
the like and upon other air chambers for admitting air and retaining it in a
compressed state, the object of my invention being to supply a valve which is
simple in construction and which may be relied on to keep the compressed air
from escaping from the chamber.
According to my invention I use (instead of an automatic valve) a screw down
valve inserted into one end of a metal tube by means of a left-handed thread.
This tube at its other end is suitably screwed or fixed to the chamber wherein
the air is to be compressed and in the case of a tire passes through the rim of
the wheel in the ordinary way. The screw down valve has the end acting as
the valve proper of conical shape and the thread employed for screwing this valve
to its seating is inimediately adjacent to the conical end. Beyond this thread is
a collar or flange with a milled edge and beyond this collar is a screwed enu with
a right handed thread for the attachment of the pump or inflator. This screw
down valve has a small hole drilled so far into it as not to go through the conical
end, and meeting this hole at right angles to it is another small hole which
passes through the lower part of the conical end.
To operate this valve when screwed into the tube by means of the left handed
thread previously described the pump or inflator is screwed on in the usual way
by means of a right handed thread and the action of tightening up the same
slightly unscrews the screw down valve from its seating so that the pump or
inflator can be used; when sufficient air has been pumped into the air chamber
and the pump is slacked off from the screw down valve the latter will at the
same time be screwed down to its seating by means of the left-handed thread before
described whereby the air under compression will be retained.
Dated the 9th day of April 1898
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
Improvements in Inflation Valves for Pneumatic Tires and other Air
Chambers.
I, ROBERT REID, of 106, A'Beckett Street, Melbourne, in the Colony of Victoria,
Engineer, do hereby declare the nature of this invention and in what manner the

page_text: same is to be performed, to be particularly described and ascertained in and by the
following statement; -
My invention relates to valves such as are used upon the tires of bicycles and
the like and upon other air chambers for admitting air and retaining it in a
compressed state, the object of my invention being to supply a valve which is
simple in construction and which may be relied on to keep the compressed air
from escaping from the chamber.
In the accompanying drawing,—
Figure 1 is a longitudinal section of a valve constructed according to my
invention and drawn to an exaggerated scale;
Figure 2 is a sectional view of one part of the valve; and
Figure 3 is an elevation of another part of the said valve.
My improved valve comprises a tubular portion a and a screw down portion
the screw down portion being provided with a left-handed screw-thread c adapted
to engage with corresponding screw-threads d in one end of the tubular portion a;
this tubular portion at the other end is formed with a screw-thread as at e or
otherwise suitably grooved in order to enable it to be fixed to the chamber wherein
the air is to be compressed, or in the case of a pneumatic tire this end may be
passed through the rim and fixed to the air chamber of the tire in any desirable
manner. At the bottom of the screw-threads d a seat f for the valve is formed.
The screw down or valve portion 6 has the end which acts as the valve proper
made flat as shewn at g, and the other end of the said valve portion bis pro-
vided with a right-handed screw thread h. Between the screw-threads c and h
is a collar or flange i having a milled edge. Through the said valve portion b
a hole is formed longitudinally which hole at one end communicates with a
transverse hole & formed between the screw-thread c and the end g.
With the construction herein before described the act of tightly screwing the
nipple or union of the pump or inflator onto the thread h serves to slightly turn
the valve portion 6 so that the end g is moved away from the valve seating, thereby
allowing the air from the pump to flow through the passages and k and past
the valve; when sufficient air has been pumped into the air chamber and the pump
is to be removed, the act of unscrewing the nipple or union from the thread
serves first of all to rotate the valve portion b so as to press the end y against its
seating and thereby close the said valve, the continued rotation of the nipple
serving to remove it from the thread h.
The collar with the milled edge serves for tightly screwing down the valve or
opening it when required.
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 inflation valve consisting of two parts screwed one into the other one
of which is designed for attachment to the air chamber to be inflated and the
other for the attachment of the inflating pump, the part which forms the valve
proper being provided at the two ends with screw-threads of opposite hand in
such a manner that the screwing on of the nipple or union of the inflating pump
serves to open the valve and the unscrewing of the said nipple or union to close
the valve, substantially as described.
2. The manufacture and use of inflation valves substantially as hereinbefore
described and illustrated in the accompanying drawing.
Dated the 30th day of December 1898.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.