Improvements in Valves for Pneumatic Tyres and other Air Chambers.
Year: 1892

page_text: Date of Application, 20th Feb., 1892
Complete Specification Left, 18th Oct., 1892-Accepted, 17th Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Valves for Pneumatic Tyres and other Air
Chambers.
I EDWARD HENRY SEDDON of Marsland Road Brooklands in the County of
Chester, India Rubber Manufacturer do hereby declare the nature of this invention
to be as follows :-
My invention relates to valves for pneumatic tyres and other air chambers and
consists in improvements in the construction of the valves having for their object
special means for facilitating the cutting off of the air passage through the valve
while the act of inflation or injection is taking place without removing or detaching
the air pump therefrom.
My improvements consist in constructing the valve with two seats and seals one
having a selfacting lift and the other being provided with a screw down plug
or face.
In carrying out my invention I by preference form the double valve in one casing
and screw the casing to a tube neck or its equivalent which is in communication
with and fixed to the air chamber. In the casing I arrange a selfacting spindle
valve having a ball disc or its equivalent faced with or without an elastic substance
and fitted to the valve seat in such a manner as to ensure a somewhat perfect seal.
The spindle may or may not be provided with a spring to assist in keeping it down.
The passage leading through the valve seat below the spindle is also formed with a
valve seat at its entrance upon or into which a plug or face is arranged to screw
down so as to seal the passage, the spindle of the plug or face passing through a
stuffing box in the casing or having a packing washer interposed between the gland
on the spindle and the enlarged head thereof. A nozzle is provided on the casing,
the passage thereof entering the casing in such a manner that the injected air shall
pass to the selfacting valve only when the screw down valve is open. A milled
head is provided on the spindle and a dust cap is fitted to the nozzle.
Dated this 18th day of February 1909
R. J. URQUHART,
57, Barton Arcade, Manchester, Consulting Engineer and Patent Agent.
COMPLETE SPECIFICATION.
Improvements in Valves for Pneumatic Tyres and other Air
Chambers.
I EDWARD HENRY SEDDON of Marsland Road, Brooklands in the County of
Chester, India Rubber 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 invention relates to valves for pneumatic tyres and other air chambers, and
consists in an improved construction of valve the object being chiefly to cut off the
air passage through the valve while the act of inflation or injection is taking place
without having first to detach the air pump. My improvements consist in con-
structing the valve with two seats and seals one having a self-acting lift and the
other having a screw down plug or valve face, the spindle of the screw down plug
or valve passing through the cover of the casing and having an enlarged head and
a packing washer interposed between the cover and said head.

page_text: In the drawings attached hereunto
Figure 1 represents in section on an enlarged scale my improved valve attached
to a metal neck leading into the air chamber.
Figure 2 shews the valve detached from the neck and
Figure 3 a modified form of my improved valve.
Similar letters of reference refer to like parts in the several views.
Referring to Figures 1 and 2 A is the tube or neck inserted through the wall b
of the air tube and secured thereto and to the rim by the head and washer a¹
placed inside the rim or felloe of the wheel and the washer a² and nut a screwed
upon the tube outside the rim in the usual way. B is the valve casing screwed.
or otherwise attached to the tube A. The upper part of the casing is bored
and so as to form an air passage with a seating for a selfacting lift valve c
which may be as shown a small cylinder with conical face fitting loosely into
the bore so as to allow the air to pass it and prevented from falling out by a
pin cor may be of any other suitable form of freely lifting valve. A spring
may be used to assist in keeping it down. The lower part 2 of the casing B
is bored out so as to form another seating at the lower end of the air passage b¹
and is tapped with a screw thread. D is the screw down plug or valve formed.
with an enlarged head d screw threaded outside, and a spindle d' that passes
through the cover C screwed air tight upon the casing B and has a milled
plate fixed upon it by means of which the plug or valve D can be turned.
The upper part of the head d is somewhat reduced in diameter and formed with
a valve face d³ which when screwed down on its seating closes the passage b.
The valve face d³ may be flat as shewn or conical and may have a washer
of leather or rubber attached to it or such washer may be placed on the valve
seating and the valve face d³ may be solid with the head d as shewn or loose
with a shank inserted into the head as ordinarily made for water taps. A washer e
of rubber or leather is placed under the head or upon the cover C.
plug D is bored up the centre with a lateral outlet opening under the face d³,
and the spindle is screwed at its outer end d for the attachment of the inflator
nozzle. E is a cap which can be screwed upon the end d to keep out the
.dust.
The
The arrangement shewn by Fig. 3 differs from the one described with reference
to Figs. 1 and 2 only in having a lateral projection for the attachment of the
inflater formed on the casing B the plug D being solid in this case.
When inflating the plug D is screwed out till the head d comes against the
cover C the washer e making an air tight joint and preventing the air injected from
escaping past the head and spindle of the plug. The lift valve c acts as back
pressure valve during inflation and when the tyre is sufficiently filled with compressed
air, the plug D is screwed down to close the orifice & tightly, thus making a double
seal.
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.
A valve constructed with a self acting lift valve and seat therefore in the valve
casing, and a faced plug arranged to screw down upon a seat in the casing to
cut off the air passage to said lifting valve and formed with an enlarged head or
equivalent part that can be screwed back against the cover or gland of the valve
casing, substantially as and for the purposes hereinbefore described and indicated
by the drawings.
R. J. URQUHART,
57, Barton Arcade, Manchester, 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.