Improvements in and relating to Valves for Pneumatic Tyres.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Valves for Pneumatic Tyres.
I, SEDGELEY LORD, of 13, Dagmar Road, London, N.E., Cycle Manufacturer,
do hereby declare the nature of this invention to be as follows:-
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In accordance with my invention the valvular device comprises two seatings,
one at top and the other at bottom, with a main portion between the two
seatings. This main portion is hereinafter designated the "body." Said "body
would preferably, be of cylindrical form, and be made of any suitable metal or
other material. It is bored up for nearly its entire length and terminates at
its lower end, with a raised seating for the valve. Said "body" is screwed
externally, to receive the nuts or the like, necessary to secure it to the air tube
and the wheel rim; and, at the opposite end the "body" is screwed internally
to receive a screwed cap piece in which is formed the raised top seating and the
nose piece for the pump nozzle, with the addition of a dust excluding cover.
The screwed cap piece aforesaid is also formed with an internal recess, and
screwed internally to receive a small screwed nipple which serves to connect the
valve spindle to the screwed cap aforesaid and so as to allow of all the internal
parts being readily disconnected. The valve spindle is formed to receive a valve
at each end.
These two valves are recessed sufficiently to allow of the introduction there-
into of any suitable material or composition to ensure an effective air seal.
Now, in the operation of inflating the tyre, it is only necessary to unscrew the
screwed cap aforesaid to the extent of one or two threads, with the object of there
being a certain air space between the seating and the valve when open. Then,
upon inflation being completed, it is only necessary to reverse the aforesaid
screwing action, whereupon the whole will be hermetically sealed.
1 1000
Improvements in and relating to ves
I. SEDGELEY LORD, of 13, Dagmar Road, London, N.E., Cycle 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;-
My improvements relate to valves, especially those for use with pneumatic
tyres and I will proceed to describe my invention in connection with this par-

page_text: ticular application of same to pneumatic tyres of velocipedes and other wheeled
vehicles; in illustration of which I have also appended the accompanying sheet
of drawings.
In accordance with my improvements the valve is constructed with two seat-
:ings.
.
The main seating a is formed at the bottom of the valve body and is lineable
with or approximately so, the under side of the head of the valve, so that this
seating is always inside the air tube of tyre when affixed thereto; this disposi-
tion being to ensure that any leakage likely to occur from porosity of material
located above the main seat, could not in any way permit of a leakage of air
from the tube. The other of the two seatings aforesaid is formed, relatively
to the one first named, at the top end of the valve body. The body
c of the
valvular device situated between the two seatings would usually be cylindrical
in shape, and be made of any suitable metal or material. Said body is bored
up for nearly its entire length and terminates at its lower end with the main
raised valve seat a first above referred to. The body c is screwed externally to
receive the nuts or the like, necessary to secure it to the air tube and the wheel
rim; and, at the opposite end it is screwed internally to receive a screwed cap
piece in which is formed the raised top seating of valve. This screwed cap
piece may be formed with the nose piece for the pump nozzle in one piece, or
it may be in two parts or pieces and be joined or connected to the screwed cap
by screwing, soldering or otherwise, and with the addition where necessary of
a screwed guide piece d for the purpose of regulating the traverse of the said
screwed cap said screwed cap as well as the attached nose piece or nipple h or
one or other or both are perforated for the purpose of allowing free ingress of air
through the valve, and so to ensure the obtainment of a maximum volume of
air way or passage. Instead however, of the last above referred to cap piece
aforesaid being screwed internally to receive the nose or nipple aforesaid this
connection of parts may be effected by any other suitable means, say for instance
by the end being "spun over, or sawn or slotted through and clinched."
The valve spindle e is formed to receive a valve at each end, namely at the
one end, the main valve f and at the other end, the top or check valve g. The
two valves and g aforesaid are recessed sufficiently to allow of the introduction
thereinto of any suitable material or composition to ensure an effective air seal.
In the operation of inflating the tyre, it is only necessary to unscrew the cap
piece aforesaid to the extent of a few threads with the object of ensuring
there being a certain amount of air space between the seatings a and b and the
valves and g, when open. Then upon inflation being completed it is only
necessary to reverse the direction of the aforesaid screwing action, whereupon
the whole will be hermetically sealed.
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Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
First. A valve for pneumatic tyres constructed with two seatings disposed
in the manner and with the objects in view herein set forth.
Second. In valves, the employment of the continuous valve spindle e with a
valve at each end which perform the functions of main and check valves
respectively at one and the same time. Said valves being controlled by a con-
tinuous valve spindle.
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