A New or Improved Valve for Pneumatic Tyres.
Year: 1897

page_text: A New or Improved Valve for Pneumatic Tyres.
We, JOHN BROWN, Engineer, and HARRY NEWMAN BROWN, both of 22, Lincoln
Road, Peterborough, Engineers, do hereby declare the nature of this invention to
be as follows:-
:-
This invention relates to an improved valve especially intended for use with
pneumatic tyres, and its object is to provide a valve which is not liable to get out of.
order, and which will be thoroughly air tight.
In carrying out our invention, the stem of the valve is provided with a small
tubular extension projecting beyond the screw threaded portion.
Around this
tubular extension a small conical plug of rubber preferably vulcanised, is fitted,
the top of which is formed with a small groove continuous with a groove formed in
the extremity of the extension or stem.
On the end of this stem a tube or nipple is fitted secured to it by a nut which
screws on the stem and engages with a shoulder on the tube. The inside of the
tube at the inner end is of conical form fitting closely on the conical rubber plug,
so that when the nut is properly screwed down a completely air tight joint is
obtained. Within the tube or nipple a small pin is fitted having a conical head or
portion fitting within the conical recess of the tube. This pin is screw threaded,
the screw threaded part projecting into the outer end of the nipple. The latter is
screw threaded internally at its outer end. A cap or cover is fitted to the screwed
pin, this cap having a short stem formed with a screw threaded hole fitting the piu.
The stem of the cup is inserted in the end of the nipple, and engaged with the
pin. On turning the cap round it will screw on the pin drawing the latter up and
bringing the conical surface into contact with the inner surface of the tube or
nipple forming a completely air tight joint. The pin is also provided with a vul-
canised rubber surface at its conical part so as to render the joint more thoroughly
air tight. The head or plug of the pin is formed with a cross groove similar to
that in the extremity of the stem, preventing any danger of stopping the air
passage.
The
In order that the valve may be more securely fitted to the inner tube of the tyre, we
propose to form the end which is secured to the tube in a peculiar manner.
Hange at the end of the stem is formed with a groove in its upper surface extend-
ing completely around it. The bent plate which is employed to fix the valve to the
tube and which is placed on the other side of the rubber is formed with an annular
rib or projecting surface corresponding to the groove in the flange. When the
plate is pressed down by the nut employed to secure it in position, the rib or pro-
jecting surface will press the rubber into the groove, and will form a thoroughly
air tight joint.
1
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page_text: We, JOHN BROWN, Engineer, and HARRY NEWMAN BROWN, Engineer, both of 22,
Lincoln Road, Peterborough, 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 :-
This invention relates to an improved valve especially intended for use with
pneumatic tyres, and its 'object is to provide a valve which is not liable to get out
of order, and which will be thoroughly air-tight.
In order to more clearly describe this invention reference is had to the accom-,
panying drawings which illustrate in section and to an enlarged scale a valve
constructed according to this invention.
.
On the end of the stem a a tube or nipple b is fitted and secured to it by a
nut c which. screws on the stem and engages with a shoulder 6' on the tube or,
nipple b. A shoulder b² engages with the ledge a¹ on the stem a so that when
the nut c is screwed down, the tube 6 can be rotated but cannot be moved
lengthwise.
Within the stem a a rubber seating d is fitted upon the cross piece, a² and the.
inner surface of the said rubber seating d is of conical shape.
Within the lower portion of the tube or nipple ba pin e is fitted having a conical
portione adapted to fit within the conical surface of the rubber seating d. This
pin e is screw-threaded and engages with a screw-threaded hole in the tube or
nipple b. By, turning the tube or nipple b it will screw on the pin e drawing, the
latter up and bringing the conical portion el into contact with the conical surface.
of the rubber seating d, forming a completely air-tight joint. The conical
portion e¹ may be covered with rubber so as to render the joint more thoroughly
air-tight.
In order that the pin e may be prevented from turning it is provided with.a
lower extension e² which engages with grooves fl in the bush f, and the lower portion
of the tube or nipple 6 is flattened somewhat to allow air to pass around it.. The
slots, 6s provide the necessary connection between the interior of the stem a and the
interior of the tube or nipple 6 for the passage of air...
In order that the valve may be more securely fitted to the air tube of the tyre,
the flange h at the end of the stem a is formed with a groove h¹ extending.completely
round it. The plate i which is employed to fix the valve to the tube and which is
placed on the other side of the rubber is formed with an annular rib or projection 11
corresponding to the groove h¹. When the plate i is pressed down by means of the
nutsk the rib ¹ presses the rubber into the groove h¹and forms, a thoroughly
air tight joint..
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is
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(1). An improved valve for pneumatic tyres, comprising stem a, tube or nipple.b
having shoulders 61.62, nut' c, rubber seating d, screw-threaded pin e adapted to
engage with the tube or nipple b and having a conical portion e¹ and extension, e²,..
bush having grooves f, flange having annular
groove
h, plate having
corresponding annular rib or projection and securing puts all arranged and
operating substantially as described with reference to the accompanying drawings.
(2) An improved means for attaching valves to the air tubes of pneumatic tyres
FAT TRA
1.
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page_text: comprising the flange h having annular groove h', plate having corresponding
annular rib or projection and securing nuts j k arranged and operating
substantially as described with reference to the accompanying drawings.
Dated this 23rd day of September 1898.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicants.